{"title":"Pool Heaters for 30,000 Gallon Pools and Up","description":"\u003cstyle\u003e\n  .ns { font-size: 15px; line-height: 1.6; color: #222; }\n  .ns p { margin: 0 0 12px; }\n  .ns a { color: #00aaff; text-decoration: none; }\n  .ns a:hover { text-decoration: underline; }\n\n  .ns-table { width: 100%; border-collapse: collapse; margin: 14px 0 6px; font-size: 0.88em; border: 1px solid #d0dce8; border-radius: 8px; overflow: hidden; }\n  .ns-table thead tr { background: #0a3d62; }\n  .ns-table th { padding: 10px 12px; text-align: left; font-weight: 600; color: #fff !important; }\n  .ns-table td { padding: 9px 12px; border-top: 1px solid #d0dce8; vertical-align: middle; }\n  .ns-table tbody tr:nth-child(even) { background: #f4f8fc; }\n  .ns-table tbody tr:hover { background: #e8f4fd; }\n  .ns-table td:first-child { white-space: nowrap; font-weight: 600; color: #0a3d62; }\n  .ns-table a { color: #0a3d62; font-weight: 600; text-decoration: none; }\n  .ns-table a:hover { text-decoration: underline; 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}\n  .cr-panel ul { margin: 0 0 4px; padding-left: 18px; font-size: 0.88em; line-height: 1.8; }\n  .cr-panel ul li { margin-bottom: 2px; }\n  .cr-panel .cr-note { font-size: 0.78em; opacity: .82; margin-top: 10px; padding-top: 10px; border-top: 1px solid rgba(255,255,255,.2); }\n  .pill { display: inline-block; background: rgba(255,255,255,.18); padding: 1px 7px; border-radius: 8px; font-size: .78em; margin-left: 3px; vertical-align: middle; }\n\n  #db1:checked ~ .calc-wrap .seg-btn[for=\"db1\"],\n  #db2:checked ~ .calc-wrap .seg-btn[for=\"db2\"],\n  #db3:checked ~ .calc-wrap .seg-btn[for=\"db3\"],\n  #db4:checked ~ .calc-wrap .seg-btn[for=\"db4\"],\n  #db5:checked ~ .calc-wrap .seg-btn[for=\"db5\"] { background: #0a3d62; color: #fff; border-color: #0a3d62; }\n\n  #db1:checked ~ .calc-wrap .cr-1,\n  #db2:checked ~ .calc-wrap .cr-2,\n  #db3:checked ~ .calc-wrap .cr-3,\n  #db4:checked ~ .calc-wrap .cr-4,\n  #db5:checked ~ .calc-wrap .cr-5 { display: block; }\n\n  #db1:checked ~ .calc-wrap .cr-default,\n  #db2:checked ~ .calc-wrap .cr-default,\n  #db3:checked ~ .calc-wrap .cr-default,\n  #db4:checked ~ .calc-wrap .cr-default,\n  #db5:checked ~ .calc-wrap .cr-default { display: none; }\n\n  .calc-note-sm { font-size: 0.78em; color: #666; margin: 8px 0 0; }\n\n  @media (max-width: 560px) {\n    .seg-btn { min-width: 60px; font-size: 0.7em; padding: 7px 3px; }\n  }\n  @media (max-width: 600px) {\n    .ns-table thead { display: none; }\n    .ns-table tr { display: block; margin-bottom: 10px; border: 1px solid #d0dce8; border-radius: 6px; }\n    .ns-table td { display: block; text-align: right; padding: 7px 10px; border-top: 1px solid #eee; }\n    .ns-table td::before { content: attr(data-label); float: left; font-weight: 700; color: #0a3d62; }\n    .ns-table td:first-child { background: #0a3d62; color: #fff; text-align: left; border-radius: 5px 5px 0 0; }\n    .ns-table td:first-child::before { display: none; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"ns\"\u003e\n\u003ch2\u003ePool Heaters for 30,000 Gallon Swimming Pools and Larger\u003c\/h2\u003e\n\u003cp\u003eThis collection covers pool heaters for inground pools above 30,000 gallons - a volume typical of larger residential pools, custom builds, and light commercial applications. It includes the AquaCal SQ200R, a 138,000 BTU inverter heat pump rated for pools up to 35,000 gallons and the most energy-efficient option in this collection, alongside eight Hayward H-series gas heaters in natural gas and propane versions spanning 150,000 to 400,000 BTUs. The AquaCal SQ200R requires a 220V dedicated circuit and no gas line. All Hayward gas models require a natural gas line or propane tank plus a 240V electrical connection.\u003c\/p\u003e\n\u003ca href=\"#bottom\" class=\"ns-skip\"\u003eSkip to products\u003c\/a\u003e\n\u003ch2\u003eWhat Size Pool Heater Do I Need for a 30,000 to 80,000 Gallon Swimming Pool?\u003c\/h2\u003e\n\u003cp\u003eSelect your pool size or use case below to see the right models, BTU requirements, and estimated running costs.\u003c\/p\u003e\n\u003cinput class=\"calc-radio\" id=\"db1\" name=\"calc-30kup\" type=\"radio\"\u003e \u003cinput class=\"calc-radio\" id=\"db2\" name=\"calc-30kup\" type=\"radio\"\u003e \u003cinput class=\"calc-radio\" id=\"db3\" name=\"calc-30kup\" type=\"radio\"\u003e \u003cinput class=\"calc-radio\" id=\"db4\" name=\"calc-30kup\" type=\"radio\"\u003e \u003cinput class=\"calc-radio\" id=\"db5\" name=\"calc-30kup\" type=\"radio\"\u003e\n\u003cdiv class=\"calc-wrap\"\u003e\n\u003cspan class=\"calc-field-label\"\u003eMy pool holds approximately...\u003c\/span\u003e\n\u003cdiv class=\"seg\"\u003e\n\u003clabel for=\"db1\" class=\"seg-btn\"\u003e30,000-35,000 gal\u003c\/label\u003e \u003clabel for=\"db2\" class=\"seg-btn\"\u003e35,000-45,000 gal\u003c\/label\u003e \u003clabel for=\"db3\" class=\"seg-btn\"\u003e45,000-50,000 gal\u003c\/label\u003e \u003clabel for=\"db4\" class=\"seg-btn\"\u003eOver 50,000 gal\u003c\/label\u003e \u003clabel for=\"db5\" class=\"seg-btn\"\u003eSpa heating\u003c\/label\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"calc-result\"\u003e\n\u003cspan class=\"cr-default\"\u003eSelect your pool size above to see recommendations.\u003c\/span\u003e\n\u003cdiv class=\"cr-panel cr-1\"\u003e\n\u003cspan class=\"cr-head\"\u003e30,000-35,000 gal - recommended: 138,000-150,000 BTU\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/aquacal-sq200r-pool-heat-pump-heat-cool\"\u003eAquaCal SQ200R\u003c\/a\u003e - $6,450 - approx. $72\/mo (warm) or $98\/mo (moderate) \u003cspan class=\"pill\"\u003eInverter\u003c\/span\u003e \u003cspan class=\"pill\"\u003eSpa\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/hayward-h150-pool-heater-natural-gas-150k-btu\"\u003eHayward H150 Natural Gas\u003c\/a\u003e - $2,999 - gas heater, fast heat-up at any air temp \u003cspan class=\"pill\"\u003eGas\u003c\/span\u003e \u003cspan class=\"pill\"\u003eSpa\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/hayward-h150-pool-heater-propane-150k-btu\"\u003eHayward H150 Propane\u003c\/a\u003e - $2,999 - same as above on LP gas \u003cspan class=\"pill\"\u003eGas\u003c\/span\u003e \u003cspan class=\"pill\"\u003eSpa\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"cr-note\"\u003eThe AquaCal SQ200R is the only heat pump in this collection - it is the right choice for warm or moderate climates where the pool is used regularly and energy efficiency matters. The Hayward H150 gas models are significantly cheaper upfront and heat much faster, making them the better fit for occasional use, cold climates, or pools that sit unused for stretches.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cr-panel cr-2\"\u003e\n\u003cspan class=\"cr-head\"\u003e35,000-45,000 gal - recommended: 150,000-200,000 BTU\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/hayward-h150-pool-heater-natural-gas-150k-btu\"\u003eHayward H150 Natural Gas\u003c\/a\u003e - $2,999 - 150,000 BTU, up to 35,000 gal \u003cspan class=\"pill\"\u003eGas\u003c\/span\u003e \u003cspan class=\"pill\"\u003eSpa\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/hayward-h150-pool-heater-propane-150k-btu\"\u003eHayward H150 Propane\u003c\/a\u003e - $2,999 - 150,000 BTU, up to 35,000 gal \u003cspan class=\"pill\"\u003eGas\u003c\/span\u003e \u003cspan class=\"pill\"\u003eSpa\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/hayward-h200-pool-heater-natural-gas-200k-btu\"\u003eHayward H200 Natural Gas\u003c\/a\u003e - $3,699 - 200,000 BTU, up to 45,000 gal \u003cspan class=\"pill\"\u003eGas\u003c\/span\u003e \u003cspan class=\"pill\"\u003eSpa\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/hayward-h200-pool-heater-propane-200k-btu\"\u003eHayward H200 Propane\u003c\/a\u003e - $3,699 - 200,000 BTU, up to 45,000 gal \u003cspan class=\"pill\"\u003eGas\u003c\/span\u003e \u003cspan class=\"pill\"\u003eSpa\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"cr-note\"\u003eFor a pool in the 35,000 to 45,000 gallon range, the H200 is the correctly sized model. The H150 is included for pools on the lower end of this bracket where slightly undersizing is acceptable in exchange for a lower price and faster run cycles. Sizing up to the H200 gives faster heat-up and runs the unit at lower capacity, which reduces wear.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cr-panel cr-3\"\u003e\n\u003cspan class=\"cr-head\"\u003e45,000-50,000 gal - recommended: 200,000-250,000 BTU\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/hayward-h200-pool-heater-natural-gas-200k-btu\"\u003eHayward H200 Natural Gas\u003c\/a\u003e - $3,699 - 200,000 BTU, up to 45,000 gal \u003cspan class=\"pill\"\u003eGas\u003c\/span\u003e \u003cspan class=\"pill\"\u003eSpa\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/hayward-h200-pool-heater-propane-200k-btu\"\u003eHayward H200 Propane\u003c\/a\u003e - $3,699 - 200,000 BTU, up to 45,000 gal \u003cspan class=\"pill\"\u003eGas\u003c\/span\u003e \u003cspan class=\"pill\"\u003eSpa\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/hayward-h250-pool-heater-natural-gas-250k-btu\"\u003eHayward H250 Natural Gas\u003c\/a\u003e - $3,999 - 250,000 BTU, up to 50,000 gal \u003cspan class=\"pill\"\u003eGas\u003c\/span\u003e \u003cspan class=\"pill\"\u003eSpa\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/hayward-h250-pool-heater-propane-250k-btu\"\u003eHayward H250 Propane\u003c\/a\u003e - $3,999 - 250,000 BTU, up to 50,000 gal \u003cspan class=\"pill\"\u003eGas\u003c\/span\u003e \u003cspan class=\"pill\"\u003eSpa\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"cr-note\"\u003eThe H250 at 250,000 BTUs is the right size for pools approaching 50,000 gallons. For pools right at 45,000 gallons, the H200 is adequate, but the H250 at only $300 more heats faster and runs at lower output, reducing fuel consumption per degree of temperature rise.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cr-panel cr-4\"\u003e\n\u003cspan class=\"cr-head\"\u003eOver 50,000 gal - recommended: 400,000 BTU\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/hayward-h400-pool-heater-natural-gas-400k-btu\"\u003eHayward H400 Natural Gas\u003c\/a\u003e - $5,099 - 400,000 BTU, up to 80,000 gal \u003cspan class=\"pill\"\u003eGas\u003c\/span\u003e \u003cspan class=\"pill\"\u003eSpa\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/hayward-h400-pool-heater-propane-400k-btu\"\u003eHayward H400 Propane\u003c\/a\u003e - $5,099 - 400,000 BTU, up to 80,000 gal \u003cspan class=\"pill\"\u003eGas\u003c\/span\u003e \u003cspan class=\"pill\"\u003eSpa\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"cr-note\"\u003eThe Hayward H400 is the largest residential gas pool heater available and handles pools up to 80,000 gallons. At 400,000 BTUs it can raise a 50,000 gallon pool by roughly 8 degrees Fahrenheit per hour. It requires a 240V circuit and a high-capacity gas supply - a licensed contractor should verify your gas line can support the flow rate before installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cr-panel cr-5\"\u003e\n\u003cspan class=\"cr-head\"\u003eSpa-capable heaters in this collection\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/aquacal-sq200r-pool-heat-pump-heat-cool\"\u003eAquaCal SQ200R\u003c\/a\u003e - $6,450 - pools up to 35,000 gal - spa mode to 104 F \u003cspan class=\"pill\"\u003eInverter\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/hayward-h150-pool-heater-natural-gas-150k-btu\"\u003eHayward H150 Natural Gas\u003c\/a\u003e - $2,999 - pools up to 35,000 gal - spa mode to 104 F \u003cspan class=\"pill\"\u003eGas\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/hayward-h150-pool-heater-propane-150k-btu\"\u003eHayward H150 Propane\u003c\/a\u003e - $2,999 - pools up to 35,000 gal - spa mode to 104 F \u003cspan class=\"pill\"\u003eGas\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/hayward-h200-pool-heater-natural-gas-200k-btu\"\u003eHayward H200 Natural Gas\u003c\/a\u003e - $3,699 - pools up to 45,000 gal - spa mode to 104 F \u003cspan class=\"pill\"\u003eGas\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/hayward-h200-pool-heater-propane-200k-btu\"\u003eHayward H200 Propane\u003c\/a\u003e - $3,699 - pools up to 45,000 gal - spa mode to 104 F \u003cspan class=\"pill\"\u003eGas\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/hayward-h250-pool-heater-natural-gas-250k-btu\"\u003eHayward H250 Natural Gas\u003c\/a\u003e - $3,999 - pools up to 50,000 gal - spa mode to 104 F \u003cspan class=\"pill\"\u003eGas\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/hayward-h250-pool-heater-propane-250k-btu\"\u003eHayward H250 Propane\u003c\/a\u003e - $3,999 - pools up to 50,000 gal - spa mode to 104 F \u003cspan class=\"pill\"\u003eGas\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/hayward-h400-pool-heater-natural-gas-400k-btu\"\u003eHayward H400 Natural Gas\u003c\/a\u003e - $5,099 - pools up to 80,000 gal - spa mode to 104 F \u003cspan class=\"pill\"\u003eGas\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/hayward-h400-pool-heater-propane-400k-btu\"\u003eHayward H400 Propane\u003c\/a\u003e - $5,099 - pools up to 80,000 gal - spa mode to 104 F \u003cspan class=\"pill\"\u003eGas\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"cr-note\"\u003eAll 9 models in this collection support spa mode to 104 F. The Hayward gas heaters are particularly well suited for spa use because they heat water quickly - a gas heater can bring a cold spa to temperature in under an hour, while the AquaCal SQ200R heat pump heats at 1 to 2 degrees F per hour and is better suited for maintaining spa temperature in a pool\/spa combination kept warm together.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"calc-note-sm\"\u003eMonthly cost estimates for the AquaCal SQ200R assume a moderate climate swim season and average US electricity rate of $0.17\/kWh. Gas heater running costs depend on local gas rates and usage frequency. Pool cover use reduces heat pump running costs by up to 40%. Call us at \u003ca style=\"color: #0a7cc4;\" href=\"tel:800-809-3741\"\u003e800-809-3741\u003c\/a\u003e for personalised sizing advice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003ePool Heaters for Large Swimming Pools: Hayward H150, H200, H250, H400, and AquaCal SQ200R\u003c\/h2\u003e\n\u003ctable class=\"ns-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003ePool Size\u003c\/th\u003e\n\u003cth\u003eUnit\u003c\/th\u003e\n\u003cth\u003eBTUs\u003c\/th\u003e\n\u003cth\u003eType \/ Mode\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"3\" data-label=\"Pool Size\"\u003eUp to 35,000 gal\u003c\/td\u003e\n\u003ctd data-label=\"Unit\"\u003e\u003ca href=\"\/products\/aquacal-sq200r-pool-heat-pump-heat-cool\"\u003eAquaCal SQ200R\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd data-label=\"BTUs\"\u003e138,000\u003c\/td\u003e\n\u003ctd data-label=\"Type \/ Mode\"\u003e\n\u003cspan class=\"tag tag-heatcool\"\u003eHeat\/Cool\u003c\/span\u003e \u003cspan class=\"tag tag-inv\"\u003eInverter\u003c\/span\u003e \u003cspan class=\"tag tag-spa\"\u003eSpa\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd data-label=\"Price\"\u003e$6,450\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Unit\"\u003e\u003ca href=\"\/products\/hayward-h150-pool-heater-natural-gas-150k-btu\"\u003eHayward H150 Natural Gas\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd data-label=\"BTUs\"\u003e150,000\u003c\/td\u003e\n\u003ctd data-label=\"Type \/ Mode\"\u003e\n\u003cspan class=\"tag tag-gas\"\u003eGas\u003c\/span\u003e \u003cspan class=\"tag tag-heatonly\"\u003eHeat Only\u003c\/span\u003e \u003cspan class=\"tag tag-spa\"\u003eSpa\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd data-label=\"Price\"\u003e$2,999\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Unit\"\u003e\u003ca href=\"\/products\/hayward-h150-pool-heater-propane-150k-btu\"\u003eHayward H150 Propane\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd data-label=\"BTUs\"\u003e150,000\u003c\/td\u003e\n\u003ctd data-label=\"Type \/ Mode\"\u003e\n\u003cspan class=\"tag tag-gas\"\u003eGas\u003c\/span\u003e \u003cspan class=\"tag tag-heatonly\"\u003eHeat Only\u003c\/span\u003e \u003cspan class=\"tag tag-spa\"\u003eSpa\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd data-label=\"Price\"\u003e$2,999\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"2\" data-label=\"Pool Size\"\u003eUp to 45,000 gal\u003c\/td\u003e\n\u003ctd data-label=\"Unit\"\u003e\u003ca href=\"\/products\/hayward-h200-pool-heater-natural-gas-200k-btu\"\u003eHayward H200 Natural Gas\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd data-label=\"BTUs\"\u003e200,000\u003c\/td\u003e\n\u003ctd data-label=\"Type \/ Mode\"\u003e\n\u003cspan class=\"tag tag-gas\"\u003eGas\u003c\/span\u003e \u003cspan class=\"tag tag-heatonly\"\u003eHeat Only\u003c\/span\u003e \u003cspan class=\"tag tag-spa\"\u003eSpa\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd data-label=\"Price\"\u003e$3,699\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Unit\"\u003e\u003ca href=\"\/products\/hayward-h200-pool-heater-propane-200k-btu\"\u003eHayward H200 Propane\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd data-label=\"BTUs\"\u003e200,000\u003c\/td\u003e\n\u003ctd data-label=\"Type \/ Mode\"\u003e\n\u003cspan class=\"tag tag-gas\"\u003eGas\u003c\/span\u003e \u003cspan class=\"tag tag-heatonly\"\u003eHeat Only\u003c\/span\u003e \u003cspan class=\"tag tag-spa\"\u003eSpa\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd data-label=\"Price\"\u003e$3,699\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"2\" data-label=\"Pool Size\"\u003eUp to 50,000 gal\u003c\/td\u003e\n\u003ctd data-label=\"Unit\"\u003e\u003ca href=\"\/products\/hayward-h250-pool-heater-natural-gas-250k-btu\"\u003eHayward H250 Natural Gas\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd data-label=\"BTUs\"\u003e250,000\u003c\/td\u003e\n\u003ctd data-label=\"Type \/ Mode\"\u003e\n\u003cspan class=\"tag tag-gas\"\u003eGas\u003c\/span\u003e \u003cspan class=\"tag tag-heatonly\"\u003eHeat Only\u003c\/span\u003e \u003cspan class=\"tag tag-spa\"\u003eSpa\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd data-label=\"Price\"\u003e$3,999\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Unit\"\u003e\u003ca href=\"\/products\/hayward-h250-pool-heater-propane-250k-btu\"\u003eHayward H250 Propane\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd data-label=\"BTUs\"\u003e250,000\u003c\/td\u003e\n\u003ctd data-label=\"Type \/ Mode\"\u003e\n\u003cspan class=\"tag tag-gas\"\u003eGas\u003c\/span\u003e \u003cspan class=\"tag tag-heatonly\"\u003eHeat Only\u003c\/span\u003e \u003cspan class=\"tag tag-spa\"\u003eSpa\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd data-label=\"Price\"\u003e$3,999\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"2\" data-label=\"Pool Size\"\u003eUp to 80,000 gal\u003c\/td\u003e\n\u003ctd data-label=\"Unit\"\u003e\u003ca href=\"\/products\/hayward-h400-pool-heater-natural-gas-400k-btu\"\u003eHayward H400 Natural Gas\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd data-label=\"BTUs\"\u003e400,000\u003c\/td\u003e\n\u003ctd data-label=\"Type \/ Mode\"\u003e\n\u003cspan class=\"tag tag-gas\"\u003eGas\u003c\/span\u003e \u003cspan class=\"tag tag-heatonly\"\u003eHeat Only\u003c\/span\u003e \u003cspan class=\"tag tag-spa\"\u003eSpa\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd data-label=\"Price\"\u003e$5,099\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Unit\"\u003e\u003ca href=\"\/products\/hayward-h400-pool-heater-propane-400k-btu\"\u003eHayward H400 Propane\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd data-label=\"BTUs\"\u003e400,000\u003c\/td\u003e\n\u003ctd data-label=\"Type \/ Mode\"\u003e\n\u003cspan class=\"tag tag-gas\"\u003eGas\u003c\/span\u003e \u003cspan class=\"tag tag-heatonly\"\u003eHeat Only\u003c\/span\u003e \u003cspan class=\"tag tag-spa\"\u003eSpa\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd data-label=\"Price\"\u003e$5,099\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp class=\"ns-note\"\u003e\u003cspan class=\"tag tag-gas\"\u003eGas\u003c\/span\u003e heaters require a natural gas line or propane tank plus a 240V circuit. \u003cspan class=\"tag tag-heatcool\"\u003eHeat\/Cool\u003c\/span\u003e units both heat and chill - the AquaCal SQ200R can cool the pool in summer. \u003cspan class=\"tag tag-inv\"\u003eInverter\u003c\/span\u003e models vary output for lower running costs and quieter operation. \u003cspan class=\"tag tag-spa\"\u003eSpa\u003c\/span\u003e units are rated for spa use to 104 F. All models in this collection are for inground pools.\u003c\/p\u003e\n\u003cdiv style=\"margin: 28px 0 0;\"\u003e\n\u003ch2 style=\"font-size: 1.2em; color: #0a3d62; margin: 0 0 16px;\"\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cdiv style=\"border-top: 1px solid #d0dce8; padding: 14px 0;\"\u003e\n\u003ch3 style=\"font-size: 0.97em; color: #0a3d62; margin: 0 0 6px; font-weight: bold;\"\u003eHow many BTUs do I need for a pool over 30,000 gallons?\u003c\/h3\u003e\n\u003cp style=\"font-size: 0.9em; color: #333; margin: 0; line-height: 1.6;\"\u003eFor gas heaters, the general rule is 50,000 BTUs per 10,000 gallons as a minimum - so a 35,000 gallon pool needs at least 175,000 BTUs, making the H200 at 200,000 BTUs the correctly sized option. Sizing up is always better: a larger unit heats faster and runs at lower output, which reduces wear and fuel consumption per degree of heat. For heat pumps, pool size ratings are based on sustained maintenance heating rather than raw BTU output - the AquaCal SQ200R at 138,000 BTUs is rated to 35,000 gallons based on real-world tested performance rather than a simple BTU formula.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-top: 1px solid #d0dce8; padding: 14px 0;\"\u003e\n\u003ch3 style=\"font-size: 0.97em; color: #0a3d62; margin: 0 0 6px; font-weight: bold;\"\u003eShould I choose natural gas or propane for a large pool heater?\u003c\/h3\u003e\n\u003cp style=\"font-size: 0.9em; color: #333; margin: 0; line-height: 1.6;\"\u003eThe Hayward H-series heaters are available in both natural gas and propane versions at identical prices. If your property already has a natural gas supply line, natural gas is the more convenient and typically lower-cost fuel option. Propane is the practical choice for properties without a gas line - a 250-gallon or larger propane tank is typical for a pool heater in the 150,000 to 400,000 BTU range. At the H400 level, consumption is high enough that a 500-gallon tank and regular delivery schedule is worth planning for. A propane supplier can advise on tank sizing based on your expected usage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-top: 1px solid #d0dce8; padding: 14px 0;\"\u003e\n\u003ch3 style=\"font-size: 0.97em; color: #0a3d62; margin: 0 0 6px; font-weight: bold;\"\u003eWhy is the AquaCal SQ200R the only heat pump in this collection?\u003c\/h3\u003e\n\u003cp style=\"font-size: 0.9em; color: #333; margin: 0; line-height: 1.6;\"\u003eResidential pool heat pumps have practical upper limits - as pool volume increases, the BTU output required for fast heat-up exceeds what electric heat pumps can economically deliver. The AquaCal SQ200R at 138,000 BTUs is one of the largest residential inverter heat pumps available and is rated to 35,000 gallons. For pools above that volume, gas heaters are the standard solution - they can produce 200,000 to 400,000 BTUs efficiently and economically in a way that heat pumps cannot match at scale. If you have a 35,000 gallon pool and want a heat pump for energy efficiency, the SQ200R is the right choice. For anything larger, the Hayward H-series is the practical path.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-top: 1px solid #d0dce8; padding: 14px 0;\"\u003e\n\u003ch3 style=\"font-size: 0.97em; color: #0a3d62; margin: 0 0 6px; font-weight: bold;\"\u003eHow long does a Hayward gas pool heater take to heat a large pool?\u003c\/h3\u003e\n\u003cp style=\"font-size: 0.9em; color: #333; margin: 0; line-height: 1.6;\"\u003eA gas heater raises pool water temperature at roughly 1 degree Fahrenheit per hour per 10,000 BTUs per 10,000 gallons of water. The Hayward H400 at 400,000 BTUs heating a 40,000 gallon pool from 65 to 80 degrees Fahrenheit would take approximately 15 hours. The H200 on the same pool would take around 30 hours. Sizing up gives significantly faster heat-up - a meaningful difference if you need the pool ready quickly after a cold period.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-top: 1px solid #d0dce8; padding: 14px 0;\"\u003e\n\u003ch3 style=\"font-size: 0.97em; color: #0a3d62; margin: 0 0 6px; font-weight: bold;\"\u003eCan I use a gas pool heater with a saltwater pool?\u003c\/h3\u003e\n\u003cp style=\"font-size: 0.9em; color: #333; margin: 0; line-height: 1.6;\"\u003eYes. All Hayward H-series heaters use a cupro-nickel heat exchanger which resists the corrosion that salt and chlorine can cause in standard copper exchangers. They are compatible with saltwater pools, chlorine pools, and bromine pools. Maintaining proper water chemistry - particularly pH between 7.4 and 7.6 and total alkalinity in the correct range - is important to protect the heat exchanger regardless of sanitizer type.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-top: 1px solid #d0dce8; border-bottom: 1px solid #d0dce8; padding: 14px 0;\"\u003e\n\u003ch3 style=\"font-size: 0.97em; color: #0a3d62; margin: 0 0 6px; font-weight: bold;\"\u003eDo you offer installation?\u003c\/h3\u003e\n\u003cp style=\"font-size: 0.9em; color: #333; margin: 0; line-height: 1.6;\"\u003eYes. Visit our \u003ca href=\"\/pages\/need-installation\"\u003einstallation support page\u003c\/a\u003e for details on connecting with a licensed installer in your area. Gas pool heater installation requires a licensed contractor in most jurisdictions and must comply with local gas codes. A licensed plumber or pool professional handles the plumbing connections. The AquaCal SQ200R heat pump requires a 220V dedicated circuit and inline plumbing installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cspan id=\"bottom\"\u003e\u003c\/span\u003e\n\u003c\/div\u003e","products":[{"product_id":"aquacal-sq200r-pool-heat-pump-heat-cool","title":"AquaCal SQ200R Pool Heat Pump (Heat\/Cool)","description":"\u003c!-- more --\u003e\n\u003cp\u003eThe AquaCal SQ200R SuperQuiet is a variable-speed inverter pool heat pump rated at 138,000 BTU for pools up to 35,000 gallons. It heats and cools, runs on a pure titanium heat exchanger, and includes built-in PoolSync WiFi. Comparable heat pumps at this BTU output from other brands retail between $7,000 and $9,000. The SQ200R delivers premium performance at a competitive price point.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2-year parts and labor warranty included. Register with PoolSync within 30 days of installation for a free third year of coverage.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNot sure if the SQ200R is the right size for your pool? \u003cstrong\u003eCall us at 800-809-3741\u003c\/strong\u003e and we'll help you size it correctly before you buy.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eAll New for 2025: The SuperQuiet 200R Heats or Cools Your Pool, Now With Built-in WiFi\u003c\/h2\u003e\n\u003cp\u003eThe AquaCal SQ200R is the largest model in the SuperQuiet series. It uses an inverter-driven variable-speed compressor and a pure titanium heat exchanger to extract heat from the air, giving you precise temperature control for a fraction of the cost of a gas heater.\u003c\/p\u003e\n\u003ch3\u003eA Note from the Owner...\u003c\/h3\u003e\n\u003cblockquote\u003e\n\u003cp\u003eHi! I'm Lindsay, the founder of Nonstop Swim. I've spent thousands of hours researching products, working with our vendors, and talking to customers. Here are my thoughts on the AquaCal SQ200R:\u003c\/p\u003e\n\u003cp\u003eThe AquaCal SuperQuiet series includes the SQ200R heat pump (this one - 138K BTU for pools up to 35,000 gallons), the \u003ca href=\"https:\/\/nonstopswim.com\/products\/aquacal-sq160r-pool-heat-pump-heat-cool\" title=\"AquaCal SQ 160\"\u003eSQ160R heat pump\u003c\/a\u003e (128K BTU for pools up to 30,000 gallons), and the \u003ca href=\"https:\/\/nonstopswim.com\/products\/aquacal-sq140r-pool-heat-pump-heat-cool\" title=\"AquaCal SQ 140 heat pump\"\u003eSQ140R\u003c\/a\u003e (114K BTU for pools up to 25,000 gallons). The SQ200R is the choice if you have a large pool and\/or you want rapid, powerful heating for maximum efficiency.\u003c\/p\u003e\n\u003cp\u003eRight now, this is the heat pump to get for the most energy output at maximum efficiency, thanks to the built-in inverter technology, which allows the heater to precisely modulate its output.\u003c\/p\u003e\n\u003cp\u003eGive us a shout if you have any questions! \u003cem\u003e-Lindsay \u0026amp; the Nonstop Swim team\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr\u003e\n\u003ch2\u003eAquaCal SQ200R Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eSQ200R\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBTU Output (Heating)\u003c\/td\u003e\n\u003ctd\u003e138,000 BTU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePool Size (Recommended)\u003c\/td\u003e\n\u003ctd\u003eUp to 35,000 gallons\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperation\u003c\/td\u003e\n\u003ctd\u003eHeat and Cool\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoefficient of Performance (COP)\u003c\/td\u003e\n\u003ctd\u003e6.1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompressor Type\u003c\/td\u003e\n\u003ctd\u003eVariable speed inverter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat Exchanger\u003c\/td\u003e\n\u003ctd\u003ePure titanium (lifetime warranty)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR-410A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Options\u003c\/td\u003e\n\u003ctd\u003e1-phase 208\/230V (residential) or 3-phase 460V (commercial)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlow Resistance\u003c\/td\u003e\n\u003ctd\u003e2 PSI at 45 GPM (variable speed pump compatible)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWiFi\u003c\/td\u003e\n\u003ctd\u003eBuilt-in PoolSync WiFi (no accessories needed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003eLCD with diagnostic system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMin. Operating Temperature\u003c\/td\u003e\n\u003ctd\u003eWorks down to freezing (32°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e2 years parts and labor + 1 year free with PoolSync registration; lifetime on titanium heat exchanger\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch2\u003eThe AquaCal SQ200R: Total Pool Temperature Control Made Simple\u003c\/h2\u003e\n\u003cp\u003eThe SQ200R uses about 75% less energy than gas heaters by pulling free heat from the air through its pure titanium heat exchanger instead of burning fuel. At a 6.1 COP, it produces 6.1 units of heat energy for every 1 unit of electricity consumed. For most pool owners, that translates to a few dollars a day to maintain your target temperature.\u003c\/p\u003e\n\u003ch3\u003eKey Features at a Glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e138,000 BTU output\u003c\/strong\u003e for faster heating on pools up to 35,000 gallons\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6.1 COP\u003c\/strong\u003e for the lowest operating costs in its class\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in PoolSync WiFi\u003c\/strong\u003e for full control from your phone, no extra hardware needed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual heat and cool operation\u003c\/strong\u003e for year-round comfort\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable speed pump compatible:\u003c\/strong\u003e adds only 2 PSI at 45 GPM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePure titanium heat exchanger\u003c\/strong\u003e with lifetime warranty, rust-proof and corrosion-resistant\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSQ200R Technical Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower options:\u003c\/strong\u003e residential 1-phase (208\/230V) or commercial 3-phase (460V)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCold-weather capable:\u003c\/strong\u003e operates efficiently down to freezing temperatures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOversized titanium heat exchanger\u003c\/strong\u003e for maximum heat transfer efficiency\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLCD diagnostic display\u003c\/strong\u003e for easy troubleshooting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-duty rust-proof cabinet\u003c\/strong\u003e built for outdoor installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in condensate drain\u003c\/strong\u003e for low-maintenance operation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eAquaCal SQ200R Manual and Warranty Information\u003c\/h2\u003e\n\u003cp\u003eThe SQ200R comes with a \u003cstrong\u003e2-year warranty on parts and labor\u003c\/strong\u003e, plus a \u003cstrong\u003efree extra year of coverage when connected to the PoolSync app within 30 days of installation\u003c\/strong\u003e. The pure titanium heat exchanger carries a separate \u003cstrong\u003elifetime warranty\u003c\/strong\u003e. The PoolSync connection also enables remote monitoring and real-time diagnostics by AquaCal's Florida-based support team.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/AquaCalSQ200R-Brochure.pdf?v=1739340926\" title=\"AquaCal SQ200R Brochure\"\u003eAquaCal SQ200R Brochure (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/AquaCal-SuperQuiet-200R-Manual-Installation.pdf?v=1739340926\" title=\"AquaCal SQ200R Manual - Installation\"\u003eAquaCal SQ200R Manual - Installation (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/AquaCal-SuperQuiet-200R-Manual-Installation.pdf?v=1739340926\" title=\"AquaCal SQ200R Manual - Operation\"\u003eAquaCal SQ200R Manual - Operation (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/AquaCal-SuperQuiet-IceBreaker-SQ200-Heat-Pump-Warranty.pdf?v=1739340926\" title=\"AquaCal SQ200R Warranty\"\u003eAquaCal SQ200R Warranty (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/AquaCal-SQ-200-R-tech-specs.png?v=1739340940\" alt=\"AquaCal SQ200R tech specs\"\u003e\u003c\/p\u003e","brand":"AquaCal","offers":[{"title":"1 phase\/60 Hz\/230v + embedded PoolSync WiFi (Residential)","offer_id":46386538315993,"sku":"SQ200ARDSBPA","price":6450.0,"currency_code":"USD","in_stock":true},{"title":"3 phase\/60 Hz\/230v + embedded PoolSync WiFi (Residential)","offer_id":48444767600857,"sku":"SQ200BRDSBPA","price":6450.0,"currency_code":"USD","in_stock":true},{"title":"3 phase\/60 Hz\/460v + embedded PoolSync WiFi (Residential)","offer_id":48444767633625,"sku":"SQ200GRDSBPA","price":6450.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/AquaCal-SQ-200R-Heat-Pump-front-view.jpg?v=1774022587"},{"product_id":"hayward-h150-pool-heater-natural-gas-150k-btu","title":"Hayward H150 Pool Heater Natural Gas 150K BTU","description":"\u003c!-- more --\u003e\n\u003cp\u003eThe W3H150FDN is a natural gas pool heater built for in-ground pools and spas on Hayward's Universal H-Series platform. It delivers 150,000 BTU\/hr of heating output, operates in low ambient temperatures down to 40 degrees F, and connects via 2\" x 2-1\/2\" CPVC union fittings that simplify new installs and replacement jobs. The forced-draft combustion system and low NOx design also qualify it for use in stricter air quality regions including SCAQMD Rule 1146.2 jurisdictions.\u003c\/p\u003e\n\u003ch2\u003eW3H150FDN Universal H-Series Natural Gas Pool Heater - Specs and Features\u003c\/h2\u003e\n\u003cp\u003eThe W3H150FDN ships factory-wired for 240V single-phase, 60 Hz power but can be field-converted to 120V by swapping a jumper on the ignition control board. It draws only 5.5 circuit amps with a 15-amp maximum breaker - a minimal electrical footprint for any gas heater. It supports water flow between 20 and 125 GPM and uses a cupro nickel heat exchanger rated for salt water and chemically demanding pool environments. At 135 lb and 19\" wide, it is the smallest and lightest model in the Universal H-Series natural gas lineup - a practical advantage on tight equipment pads and straightforward replacement jobs.\u003c\/p\u003e\n\u003ch3\u003eW3H150FDN Installation and Clearance Requirements\u003c\/h3\u003e\n\u003cp\u003eThe W3H150FDN requires 6 inches of rear clearance and 12 inches on each side. The forced-draft design eliminates the need for a high-wind stack, which simplifies positioning in enclosed or semi-enclosed equipment areas. Plumbing connects via 2\" x 2-1\/2\" CPVC union fittings. Before setting the pad, confirm your natural gas meter capacity and supply line sizing are sufficient - undersized piping or a low-capacity meter will cause startup and performance issues regardless of how well everything else is installed.\u003c\/p\u003e\n\u003ch2\u003eUniversal H-Series Combustion System and Pool Sizing\u003c\/h2\u003e\n\u003cp\u003eThe Universal H-Series platform uses a forced-draft combustion design that pushes air through the chamber at a controlled rate regardless of wind conditions. That removes stack dependency and keeps combustion consistent across installation environments. Hayward's hydraulic design maintains uniform water velocity across all heat exchanger tubes, which produces faster heat-up times and reduced pump run time - Hayward rates that efficiency advantage at up to 18% compared with less efficient gas heater designs. At 150,000 BTU\/hr, this unit is well matched for pools in the 10,000 to 35,000 gallon range, with the upper end being most realistic in warmer climates where the pool holds heat well. For larger pools or faster recovery times, step up to the \u003ca title=\"Hayward W3H200FDN Natural Gas Pool Heater 200K BTU\" href=\"https:\/\/nonstopswim.com\/products\/hayward-h200-pool-heater-natural-gas-200k-btu\"\u003eW3H200FDN\u003c\/a\u003e or \u003ca title=\"Hayward W3H250FDN Natural Gas Pool Heater 250K BTU\" href=\"https:\/\/nonstopswim.com\/products\/hayward-h250-pool-heater-natural-gas-250k-btu\"\u003eW3H250FDN\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eCupro Nickel Heat Exchanger and Salt Water Resistance\u003c\/h3\u003e\n\u003cp\u003eThe W3H150FDN uses a standard cupro nickel heat exchanger, which handles salt water and aggressive pool chemistry better than standard copper alternatives. For pools running salt chlorine generators or elevated sanitizer levels, this is a meaningful spec - heat exchanger corrosion is one of the more common failure points on gas heaters over time. The cupro nickel material also holds up well in coastal installs where airborne salt adds to the chemical load on the unit.\u003c\/p\u003e\n\u003ch3\u003eW3H150FDN vs. Larger H-Series Natural Gas Models - Choosing the Right BTU\u003c\/h3\u003e\n\u003cp\u003eThe W3H150FDN shares the same Universal H-Series platform, electrical requirements, and clearances as the \u003ca title=\"Hayward W3H200FDN Natural Gas Pool Heater 200K BTU\" href=\"https:\/\/nonstopswim.com\/products\/hayward-h200-pool-heater-natural-gas-200k-btu\"\u003eW3H200FDN\u003c\/a\u003e, \u003ca title=\"Hayward W3H250FDN Natural Gas Pool Heater 250K BTU\" href=\"https:\/\/nonstopswim.com\/products\/hayward-h250-pool-heater-natural-gas-250k-btu\"\u003eW3H250FDN\u003c\/a\u003e, and \u003ca title=\"Hayward W3H400FDN Natural Gas Pool Heater 400K BTU\" href=\"https:\/\/nonstopswim.com\/products\/hayward-h400-pool-heater-natural-gas-400k-btu\"\u003eW3H400FDN\u003c\/a\u003e - the difference is output and physical size. The 150K model is the right fit for smaller pools, standalone spas, or any install where footprint and weight matter as much as heating capacity. Natural gas also runs cheaper than propane in most markets, giving this model a lower operating cost than the \u003ca title=\"Hayward W3H150FDP Propane Pool Heater 150K BTU\" href=\"https:\/\/nonstopswim.com\/products\/hayward-h150-pool-heater-propane-150k-btu\"\u003eW3H150FDP\u003c\/a\u003e over time.\u003c\/p\u003e\n\u003ctable\u003e\n\u003ccaption\u003e\u003cstrong\u003eFull Specifications - Hayward W3H150FDN Natural Gas Pool Heater\u003c\/strong\u003e\u003c\/caption\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eHayward\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel \/ SKU\u003c\/td\u003e\n\u003ctd\u003eW3H150FDN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eUniversal H-Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel Type\u003c\/td\u003e\n\u003ctd\u003eNatural Gas\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eNew Construction, Aftermarket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePool Type\u003c\/td\u003e\n\u003ctd\u003eIn Ground\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeating Capacity\u003c\/td\u003e\n\u003ctd\u003e150,000 BTU\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKilowatts\u003c\/td\u003e\n\u003ctd\u003e44 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat Exchanger\u003c\/td\u003e\n\u003ctd\u003eStandard cupro nickel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLow NOx\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling Capability\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLow Ambient Operation\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Operating Temperature\u003c\/td\u003e\n\u003ctd\u003e40 degrees F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e120\/240V (ships 240V; field-convertible to 120V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhase\u003c\/td\u003e\n\u003ctd\u003eSingle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency\u003c\/td\u003e\n\u003ctd\u003e60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit Amps\u003c\/td\u003e\n\u003ctd\u003e5.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Breaker Size\u003c\/td\u003e\n\u003ctd\u003e15 Amps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater Flow Rate\u003c\/td\u003e\n\u003ctd\u003e20 to 125 GPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePlumbing Connections\u003c\/td\u003e\n\u003ctd\u003e2\" x 2-1\/2\" CPVC union\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear Clearance\u003c\/td\u003e\n\u003ctd\u003e6\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSide Clearance\u003c\/td\u003e\n\u003ctd\u003e12\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Dimensions (H x W x L)\u003c\/td\u003e\n\u003ctd\u003e24\" x 19\" x 29.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Weight\u003c\/td\u003e\n\u003ctd\u003e135 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e30.6\" x 32.8\" x 33.3\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Weight\u003c\/td\u003e\n\u003ctd\u003e150 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActive Defrost\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoost Mode\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSilent Mode\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel\u003c\/td\u003e\n\u003ctd\u003eOpen Line\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e610377387194\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this heater natural gas or propane?\u003c\/summary\u003e\n\u003cp\u003eNatural gas. The W3H150FDN is configured for natural gas only. If your site runs propane, you need the \u003ca title=\"Hayward W3H150FDP Propane Pool Heater 150K BTU\" href=\"https:\/\/nonstopswim.com\/products\/hayward-h150-pool-heater-propane-150k-btu\"\u003eW3H150FDP\u003c\/a\u003e instead. The two are not interchangeable without a conversion, which should be done by a licensed technician.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat size pool can a 150,000 BTU heater handle?\u003c\/summary\u003e\n\u003cp\u003eAt 150,000 BTU\/hr, this unit is well matched for pools in the 10,000 to 35,000 gallon range. In warm climates like Florida where pools hold heat well, the upper end of that range is very achievable. It also works well as a dedicated spa heater. For larger pools or faster recovery, step up to the \u003ca title=\"Hayward W3H200FDN Natural Gas Pool Heater 200K BTU\" href=\"https:\/\/nonstopswim.com\/products\/hayward-h200-pool-heater-natural-gas-200k-btu\"\u003eW3H200FDN\u003c\/a\u003e or \u003ca title=\"Hayward W3H250FDN Natural Gas Pool Heater 250K BTU\" href=\"https:\/\/nonstopswim.com\/products\/hayward-h250-pool-heater-natural-gas-250k-btu\"\u003eW3H250FDN\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat type of pool is this heater made for?\u003c\/summary\u003e\n\u003cp\u003eIn-ground pools and spas. It works on both new construction and aftermarket replacement jobs, and the CPVC union connections make it a practical swap for older H-Series units already plumbed with those fittings.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat electrical service does the W3H150FDN require?\u003c\/summary\u003e\n\u003cp\u003eIt ships wired for 240V single-phase, 60 Hz with a 15-amp maximum breaker, drawing only 5.5 circuit amps. It can be field-converted to 120V by swapping a jumper on the ignition control board - see the installation manual for that procedure. Either way, the electrical draw is minimal since most of the energy comes from the gas supply, not the grid.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhy does the cupro nickel heat exchanger matter for salt pools?\u003c\/summary\u003e\n\u003cp\u003eSalt water is more corrosive to standard copper than to cupro nickel alloy. On a gas heater that runs at high temperatures, exchanger corrosion accelerates faster than on heat pumps, so the material choice has real long-term impact. Cupro nickel holds up better in salt systems and in pools that run higher sanitizer levels.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes this heater need a special vent stack or chimney?\u003c\/summary\u003e\n\u003cp\u003eNo. The forced-draft system pushes combustion air through the chamber mechanically, so performance is not dependent on wind or stack height. Indoor and semi-enclosed installations still require proper venting - see the installation manual linked below.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes the W3H150FDN meet low NOx requirements?\u003c\/summary\u003e\n\u003cp\u003eYes. It meets Low NOx clean air standards including SCAQMD Rule 1146.2, which applies in parts of Southern California and some other air quality districts. If your municipality requires low NOx compliance for pool heaters, this model qualifies.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003ch2\u003eW3H150FDN Warranty, Manuals, and Install Documentation\u003c\/h2\u003e\n\u003cp\u003eThe W3H150FDN includes a \u003cstrong\u003e1-year parts warranty\u003c\/strong\u003e. Review the installation manual before any work begins to confirm gas supply, venting, and clearance requirements are met at the site.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca title=\"Hayward W3H150FDN H-Series Natural Gas Pool Heater Installation and Operation Manual\" rel=\"noopener noreferrer\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/Hayward-H-Series-Manual.pdf?v=1774482075\" target=\"_blank\"\u003eHayward H-Series Pool Heater Installation and Operation Manual\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca title=\"Hayward H-Series Pool Heater Warranty Documentation\" rel=\"noopener noreferrer\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/Hayward-H-Series-Warranty.pdf?v=1774482074\" target=\"_blank\"\u003eHayward H-Series Pool Heater Warranty Documentation\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":48335917318361,"sku":"W3H150FDN","price":2999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/Hayward-H150-Pool-Heater-Side.jpg?v=1774484822"},{"product_id":"hayward-h150-pool-heater-propane-150k-btu","title":"Hayward H150 Pool Heater Propane 150K BTU","description":"\u003c!-- more --\u003e\n\u003cp\u003eThe W3H150FDP is a propane pool heater built for in-ground pools and spas on Hayward's Universal H-Series platform. It delivers 150,000 BTU\/hr of heating output, operates in low ambient temperatures down to 40 degrees F, and connects via 2\" x 2-1\/2\" CPVC union fittings that simplify new installs and replacement jobs. The forced-draft combustion system and low NOx design also qualify it for use in stricter air quality regions including SCAQMD Rule 1146.2 jurisdictions.\u003c\/p\u003e\n\u003ch2\u003eW3H150FDP Universal H-Series Propane Pool Heater - Specs and Features\u003c\/h2\u003e\n\u003cp\u003eThe W3H150FDP ships factory-wired for 240V single-phase, 60 Hz power but can be field-converted to 120V by swapping a jumper on the ignition control board. It draws only 5.5 circuit amps with a 15-amp maximum breaker - a minimal electrical footprint for any gas heater. It supports water flow between 20 and 125 GPM and uses a cupro nickel heat exchanger rated for salt water and chemically demanding pool environments. At 135 lb and 19\" wide, it is the smallest and lightest model in the Universal H-Series propane lineup - a practical advantage on tight equipment pads and straightforward replacement jobs.\u003c\/p\u003e\n\u003ch3\u003eW3H150FDP Installation and Clearance Requirements\u003c\/h3\u003e\n\u003cp\u003eThe W3H150FDP requires 6 inches of rear clearance and 12 inches on each side. The forced-draft design eliminates the need for a high-wind stack, which simplifies positioning in enclosed or semi-enclosed equipment areas. Plumbing connects via 2\" x 2-1\/2\" CPVC union fittings. Before setting the pad, confirm your propane supply line sizing and regulator output match the unit's fuel requirements - undersized supply lines will cause startup and performance issues regardless of how well everything else is installed.\u003c\/p\u003e\n\u003ch2\u003eUniversal H-Series Combustion System and Pool Sizing\u003c\/h2\u003e\n\u003cp\u003eThe Universal H-Series platform uses a forced-draft combustion design that pushes air through the chamber at a controlled rate regardless of wind conditions. That removes stack dependency and keeps combustion consistent across installation environments. Hayward's hydraulic design maintains uniform water velocity across all heat exchanger tubes, which produces faster heat-up times and reduced pump run time - Hayward rates that efficiency advantage at up to 18% compared with less efficient gas heater designs. At 150,000 BTU\/hr, this unit is well matched for pools in the 10,000 to 35,000 gallon range, with the upper end being most realistic in warmer climates where the pool holds heat well. For larger pools or faster recovery times, step up to the \u003ca title=\"Hayward W3H200FDP Propane Pool Heater 200K BTU\" href=\"https:\/\/nonstopswim.com\/products\/hayward-h200-pool-heater-propane-200k-btu\"\u003eW3H200FDP\u003c\/a\u003e or \u003ca title=\"Hayward W3H250FDP Propane Pool Heater 250K BTU\" href=\"https:\/\/nonstopswim.com\/products\/hayward-h250-pool-heater-propane-250k-btu\"\u003eW3H250FDP\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eCupro Nickel Heat Exchanger and Salt Water Resistance\u003c\/h3\u003e\n\u003cp\u003eThe W3H150FDP uses a standard cupro nickel heat exchanger, which handles salt water and aggressive pool chemistry better than standard copper alternatives. For pools running salt chlorine generators or elevated sanitizer levels, this is a meaningful spec - heat exchanger corrosion is one of the more common failure points on gas heaters over time. The cupro nickel material also holds up well in coastal installs where airborne salt adds to the chemical load on the unit.\u003c\/p\u003e\n\u003ch3\u003eW3H150FDP vs. Larger H-Series Propane Models - Choosing the Right BTU\u003c\/h3\u003e\n\u003cp\u003eThe W3H150FDP shares the same Universal H-Series platform, electrical requirements, and clearances as the \u003ca title=\"Hayward W3H200FDP Propane Pool Heater 200K BTU\" href=\"https:\/\/nonstopswim.com\/products\/hayward-h200-pool-heater-propane-200k-btu\"\u003eW3H200FDP\u003c\/a\u003e, \u003ca title=\"Hayward W3H250FDP Propane Pool Heater 250K BTU\" href=\"https:\/\/nonstopswim.com\/products\/hayward-h250-pool-heater-propane-250k-btu\"\u003eW3H250FDP\u003c\/a\u003e, and \u003ca title=\"Hayward W3H400FDP Propane Pool Heater 400K BTU\" href=\"https:\/\/nonstopswim.com\/products\/hayward-h400-pool-heater-propane-400k-btu\"\u003eW3H400FDP\u003c\/a\u003e - the difference is output and physical size. The 150K model is the right fit for smaller pools, standalone spas, or any install where footprint and weight matter as much as heating capacity. If your site runs natural gas instead of propane, look at the W3H150FDN.\u003c\/p\u003e\n\u003ctable\u003e\n\u003ccaption\u003e\u003cstrong\u003eFull Specifications - Hayward W3H150FDP Propane Pool Heater\u003c\/strong\u003e\u003c\/caption\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eHayward\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel \/ SKU\u003c\/td\u003e\n\u003ctd\u003eW3H150FDP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eUniversal H-Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel Type\u003c\/td\u003e\n\u003ctd\u003ePropane (LP)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eNew Construction, Renovation, Aftermarket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePool Type\u003c\/td\u003e\n\u003ctd\u003eIn Ground\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeating Capacity\u003c\/td\u003e\n\u003ctd\u003e150,000 BTU\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKilowatts\u003c\/td\u003e\n\u003ctd\u003e44 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat Exchanger\u003c\/td\u003e\n\u003ctd\u003eStandard cupro nickel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLow NOx\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling Capability\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLow Ambient Operation\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Operating Temperature\u003c\/td\u003e\n\u003ctd\u003e40 degrees F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e120\/240V (ships 240V; field-convertible to 120V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhase\u003c\/td\u003e\n\u003ctd\u003eSingle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency\u003c\/td\u003e\n\u003ctd\u003e60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit Amps\u003c\/td\u003e\n\u003ctd\u003e5.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Breaker Size\u003c\/td\u003e\n\u003ctd\u003e15 Amps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater Flow Rate\u003c\/td\u003e\n\u003ctd\u003e20 to 125 GPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePlumbing Connections\u003c\/td\u003e\n\u003ctd\u003e2\" x 2-1\/2\" CPVC union\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear Clearance\u003c\/td\u003e\n\u003ctd\u003e6\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSide Clearance\u003c\/td\u003e\n\u003ctd\u003e12\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Dimensions (H x W x L)\u003c\/td\u003e\n\u003ctd\u003e24\" x 19\" x 29.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Weight\u003c\/td\u003e\n\u003ctd\u003e135 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e30.6\" x 32.8\" x 33.3\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Weight\u003c\/td\u003e\n\u003ctd\u003e150 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActive Defrost\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoost Mode\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSilent Mode\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel\u003c\/td\u003e\n\u003ctd\u003eOpen Line\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e610377387200\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this heater for propane or natural gas?\u003c\/summary\u003e\n\u003cp\u003ePropane. The W3H150FDP is configured for LP (liquefied propane) only. If your site runs natural gas, you need the W3H150FDN instead. The two are not interchangeable without a conversion, which should be done by a licensed technician.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat size pool can a 150,000 BTU heater handle?\u003c\/summary\u003e\n\u003cp\u003eAt 150,000 BTU\/hr, this unit is well matched for pools in the 10,000 to 35,000 gallon range. In warm climates like Florida where pools hold heat well, the upper end of that range is very achievable. It also works well as a dedicated spa heater. For larger pools or faster recovery, step up to the \u003ca title=\"Hayward W3H200FDP Propane Pool Heater 200K BTU\" href=\"https:\/\/nonstopswim.com\/products\/hayward-h200-pool-heater-propane-200k-btu\"\u003eW3H200FDP\u003c\/a\u003e or \u003ca title=\"Hayward W3H250FDP Propane Pool Heater 250K BTU\" href=\"https:\/\/nonstopswim.com\/products\/hayward-h250-pool-heater-propane-250k-btu\"\u003eW3H250FDP\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat type of pool is this heater made for?\u003c\/summary\u003e\n\u003cp\u003eIn-ground pools and spas. It works on new construction, renovation, and aftermarket replacement jobs, and the CPVC union connections make it a practical swap for older H-Series units already plumbed with those fittings.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat electrical service does the W3H150FDP require?\u003c\/summary\u003e\n\u003cp\u003eIt ships wired for 240V single-phase, 60 Hz with a 15-amp maximum breaker, drawing only 5.5 circuit amps. It can be field-converted to 120V by swapping a jumper on the ignition control board - see the installation manual for that procedure. Either way, the electrical draw is minimal since most of the energy comes from the propane supply, not the grid.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhy does the cupro nickel heat exchanger matter for salt pools?\u003c\/summary\u003e\n\u003cp\u003eSalt water is more corrosive to standard copper than to cupro nickel alloy. On a gas heater that runs at high temperatures, exchanger corrosion accelerates faster than on heat pumps, so the material choice has real long-term impact. Cupro nickel holds up better in salt systems and in pools that run higher sanitizer levels.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes this heater need a special vent stack or chimney?\u003c\/summary\u003e\n\u003cp\u003eNo. The forced-draft system pushes combustion air through the chamber mechanically, so performance is not dependent on wind or stack height. Indoor and semi-enclosed installations still require proper venting - see the installation manual linked below.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003eDoes the W3H150FDP meet low NOx requirements?\u003c\/summary\u003e\n\u003cp\u003eYes. It meets Low NOx clean air standards including SCAQMD Rule 1146.2, which applies in parts of Southern California and some other air quality districts. If your municipality requires low NOx compliance for pool heaters, this model qualifies.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003ch2\u003eW3H150FDP Warranty, Manuals, and Install Documentation\u003c\/h2\u003e\n\u003cp\u003eThe W3H150FDP includes a \u003cstrong\u003e1-year parts warranty\u003c\/strong\u003e. Review the installation manual before any work begins to confirm gas supply, venting, and clearance requirements are met at the site.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca title=\"Hayward W3H150FDP H-Series Propane Pool Heater Installation and Operation Manual\" rel=\"noopener noreferrer\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/Hayward-H-Series-Manual.pdf?v=1774482075\" target=\"_blank\"\u003eHayward H-Series Pool Heater Installation and Operation Manual\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca title=\"Hayward H-Series Pool Heater Warranty Documentation\" rel=\"noopener noreferrer\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/Hayward-H-Series-Warranty.pdf?v=1774482074\" target=\"_blank\"\u003eHayward H-Series Pool Heater Warranty Documentation\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":48337170006233,"sku":"W3H150FDP","price":2999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/Hayward-H150-Pool-Heater-Side.jpg?v=1774484822"},{"product_id":"hayward-h200-pool-heater-natural-gas-200k-btu","title":"Hayward H200 Pool Heater Natural Gas 200K BTU","description":"\u003c!-- more --\u003e\n\u003cp\u003eThe W3H200FDN is a natural gas pool heater built for in-ground pools and spas on Hayward's Universal H-Series platform. It delivers 200,000 BTU\/hr of heating output, operates in low ambient temperatures down to 40 degrees F, and connects via 2\" x 2-1\/2\" CPVC union fittings that simplify new installs and replacement jobs. The forced-draft combustion system and low NOx design also qualify it for use in stricter air quality regions including SCAQMD Rule 1146.2 jurisdictions.\u003c\/p\u003e\n\n\u003ch2\u003eW3H200FDN Universal H-Series Natural Gas Pool Heater - Specs and Features\u003c\/h2\u003e\n\u003cp\u003eThe W3H200FDN ships factory-wired for 240V single-phase, 60 Hz power but can be field-converted to 120V by swapping a jumper on the ignition control board. It draws only 5.5 circuit amps with a 15-amp maximum breaker - a minimal electrical footprint for a 200K BTU unit. It supports water flow between 20 and 125 GPM and uses a cupro nickel heat exchanger rated for salt water and chemically demanding pool environments. The cabinet measures 24\" H x 22\" W x 29.5\" L and weighs 140 lb - the most compact and lightest model in the Universal H-Series natural gas lineup, which makes it easy to work with on tight equipment pads and replacement jobs.\u003c\/p\u003e\n\n\u003ch3\u003eW3H200FDN Installation and Clearance Requirements\u003c\/h3\u003e\n\u003cp\u003eThe W3H200FDN requires 6 inches of rear clearance and 12 inches on each side. The forced-draft design eliminates the need for a high-wind stack, which simplifies positioning in enclosed or semi-enclosed equipment areas. Plumbing connects via 2\" x 2-1\/2\" CPVC union fittings. Before setting the pad, confirm your natural gas meter capacity and supply line sizing are sufficient - a 200K BTU heater draws meaningful gas volume, and undersized piping or a low-capacity meter will cause startup and performance issues.\u003c\/p\u003e\n\n\u003ch2\u003eUniversal H-Series Combustion System and Pool Sizing\u003c\/h2\u003e\n\u003cp\u003eThe Universal H-Series platform uses a forced-draft combustion design that pushes air through the chamber at a controlled rate regardless of wind conditions. That removes stack dependency and keeps combustion consistent across installation environments. Hayward's hydraulic design maintains uniform water velocity across all heat exchanger tubes, which produces faster heat-up times and reduced pump run time - Hayward rates that efficiency advantage at up to 18% compared with less efficient gas heater designs. At 200,000 BTU\/hr, this unit is well matched for pools in the 15,000 to 45,000 gallon range, with the upper end being most realistic in warmer climates where the pool holds heat well. For larger pools or faster recovery times, step up to the \u003ca href=\"https:\/\/nonstopswim.com\/products\/hayward-h250-pool-heater-natural-gas-250k-btu\" title=\"Hayward W3H250FDN Natural Gas Pool Heater 250K BTU\"\u003eW3H250FDN\u003c\/a\u003e or \u003ca href=\"https:\/\/nonstopswim.com\/products\/hayward-h400-pool-heater-natural-gas-400k-btu\" title=\"Hayward W3H400FDN Natural Gas Pool Heater 400K BTU\"\u003eW3H400FDN\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eCupro Nickel Heat Exchanger and Salt Water Resistance\u003c\/h3\u003e\n\u003cp\u003eThe W3H200FDN uses a standard cupro nickel heat exchanger, which handles salt water and aggressive pool chemistry better than standard copper alternatives. For pools running salt chlorine generators or elevated sanitizer levels, this is a meaningful spec - heat exchanger corrosion is one of the more common failure points on gas heaters over time. The cupro nickel material also holds up well in coastal installs where airborne salt adds to the chemical load on the unit.\u003c\/p\u003e\n\n\u003ch3\u003eW3H200FDN vs. Larger H-Series Natural Gas Models - Which BTU Do You Need?\u003c\/h3\u003e\n\u003cp\u003eThe W3H200FDN shares the same Universal H-Series platform, electrical requirements, and clearances as the \u003ca href=\"https:\/\/nonstopswim.com\/products\/hayward-h250-pool-heater-natural-gas-250k-btu\" title=\"Hayward W3H250FDN Natural Gas Pool Heater 250K BTU\"\u003eW3H250FDN\u003c\/a\u003e and \u003ca href=\"https:\/\/nonstopswim.com\/products\/hayward-h400-pool-heater-natural-gas-400k-btu\" title=\"Hayward W3H400FDN Natural Gas Pool Heater 400K BTU\"\u003eW3H400FDN\u003c\/a\u003e - the difference is output and physical size. At 140 lb and 22\" wide, the 200K model is a practical fit for smaller residential pools up to around 45,000 gallons in warm climates, or as a dedicated spa heater where compact footprint and fast recovery matter more than raw output. Natural gas also runs cheaper than propane in most markets, giving this model a lower operating cost than the \u003ca href=\"https:\/\/nonstopswim.com\/products\/hayward-h200-pool-heater-propane-200k-btu\" title=\"Hayward W3H200FDP Propane Pool Heater 200K BTU\"\u003eW3H200FDP\u003c\/a\u003e over time.\u003c\/p\u003e\n\n\u003ctable\u003e\n  \u003ccaption\u003e\u003cstrong\u003eFull Specifications - Hayward W3H200FDN Natural Gas Pool Heater\u003c\/strong\u003e\u003c\/caption\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eHayward\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eModel \/ SKU\u003c\/td\u003e\n\u003ctd\u003eW3H200FDN\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eUniversal H-Series\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFuel Type\u003c\/td\u003e\n\u003ctd\u003eNatural Gas\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eNew Construction, Renovation\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePool Type\u003c\/td\u003e\n\u003ctd\u003eIn Ground\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHeating Capacity\u003c\/td\u003e\n\u003ctd\u003e200,000 BTU\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eKilowatts\u003c\/td\u003e\n\u003ctd\u003e59 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHeat Exchanger\u003c\/td\u003e\n\u003ctd\u003eStandard cupro nickel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLow NOx\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCooling Capability\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLow Ambient Operation\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMinimum Operating Temperature\u003c\/td\u003e\n\u003ctd\u003e40 degrees F\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e120\/240V (ships 240V; field-convertible to 120V)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePhase\u003c\/td\u003e\n\u003ctd\u003eSingle\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFrequency\u003c\/td\u003e\n\u003ctd\u003e60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCircuit Amps\u003c\/td\u003e\n\u003ctd\u003e5.5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaximum Breaker Size\u003c\/td\u003e\n\u003ctd\u003e15 Amps\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWater Flow Rate\u003c\/td\u003e\n\u003ctd\u003e20 to 125 GPM\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePlumbing Connections\u003c\/td\u003e\n\u003ctd\u003e2\" x 2-1\/2\" CPVC union\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRear Clearance\u003c\/td\u003e\n\u003ctd\u003e6\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSide Clearance\u003c\/td\u003e\n\u003ctd\u003e12\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProduct Dimensions (H x W x L)\u003c\/td\u003e\n\u003ctd\u003e24\" x 22\" x 29.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProduct Weight\u003c\/td\u003e\n\u003ctd\u003e140 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e30.6\" x 32.8\" x 33.3\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping Weight\u003c\/td\u003e\n\u003ctd\u003e161 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eActive Defrost\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBoost Mode\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSilent Mode\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eChannel\u003c\/td\u003e\n\u003ctd\u003eOpen Line\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e610377387217\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eIs this heater natural gas or propane?\u003c\/summary\u003e\n  \u003cp\u003eNatural gas. The W3H200FDN is configured for natural gas only. If your site runs propane, you need the \u003ca href=\"https:\/\/nonstopswim.com\/products\/hayward-h200-pool-heater-propane-200k-btu\" title=\"Hayward W3H200FDP Propane Pool Heater 200K BTU\"\u003eW3H200FDP\u003c\/a\u003e instead. The two are not interchangeable without a conversion, which should be done by a licensed technician.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eWhat size pool can a 200,000 BTU heater handle?\u003c\/summary\u003e\n  \u003cp\u003eAt 200,000 BTU\/hr, this unit is well matched for pools in the 15,000 to 45,000 gallon range. In warm climates like Florida where pools hold heat well, the upper end of that range is very achievable. In colder climates or for pools that sit unused and need fast recovery, size down or consider stepping up to the \u003ca href=\"https:\/\/nonstopswim.com\/products\/hayward-h250-pool-heater-natural-gas-250k-btu\" title=\"Hayward W3H250FDN Natural Gas Pool Heater 250K BTU\"\u003eW3H250FDN\u003c\/a\u003e or \u003ca href=\"https:\/\/nonstopswim.com\/products\/hayward-h400-pool-heater-natural-gas-400k-btu\" title=\"Hayward W3H400FDN Natural Gas Pool Heater 400K BTU\"\u003eW3H400FDN\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eWhat type of pool is this heater made for?\u003c\/summary\u003e\n  \u003cp\u003eIn-ground pools and spas. It works on both new construction and renovation jobs, and the CPVC union connections make it a practical swap for older H-Series units already plumbed with those fittings.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eWhat electrical service does the W3H200FDN require?\u003c\/summary\u003e\n  \u003cp\u003eIt ships wired for 240V single-phase, 60 Hz with a 15-amp maximum breaker, drawing only 5.5 circuit amps. It can be field-converted to 120V by swapping a jumper on the ignition control board - see the installation manual for that procedure. Either way, the electrical draw is minimal since most of the energy comes from the gas supply, not the grid.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eWhy does the cupro nickel heat exchanger matter for salt pools?\u003c\/summary\u003e\n  \u003cp\u003eSalt water is more corrosive to standard copper than to cupro nickel alloy. On a gas heater that runs at high temperatures, exchanger corrosion accelerates faster than on heat pumps, so the material choice has real long-term impact. Cupro nickel holds up better in salt systems and in pools that run higher sanitizer levels.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eDoes this heater need a special vent stack or chimney?\u003c\/summary\u003e\n  \u003cp\u003eNo. The forced-draft system pushes combustion air through the chamber mechanically, so performance is not dependent on wind or stack height. Indoor and semi-enclosed installations still require proper venting - see the installation manual linked below.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eDoes the W3H200FDN meet low NOx requirements?\u003c\/summary\u003e\n  \u003cp\u003eYes. It meets Low NOx clean air standards including SCAQMD Rule 1146.2, which applies in parts of Southern California and some other air quality districts. If your municipality requires low NOx compliance for pool heaters, this model qualifies.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eW3H200FDN Warranty, Manuals, and Install Documentation\u003c\/h2\u003e\n\u003cp\u003eThe W3H200FDN includes a \u003cstrong\u003e1-year parts warranty\u003c\/strong\u003e with no labor coverage. Review the installation manual before any work begins to confirm gas supply, venting, and clearance requirements are met at the site.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/Hayward-H-Series-Manual.pdf?v=1774482075\" target=\"_blank\" rel=\"noopener noreferrer\" title=\"Hayward W3H200FDN H-Series Natural Gas Pool Heater Installation and Operation Manual\"\u003eHayward H-Series Pool Heater Installation and Operation Manual\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/Hayward-H-Series-Warranty.pdf?v=1774482074\" target=\"_blank\" rel=\"noopener noreferrer\" title=\"Hayward H-Series Pool Heater Warranty Documentation\"\u003eHayward H-Series Pool Heater Warranty Documentation\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":48338287821017,"sku":"W3H200FDN","price":3699.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/Hayward-H200-Pool-Heater-poolside.jpg?v=1774484487"},{"product_id":"hayward-h200-pool-heater-propane-200k-btu","title":"Hayward H200 Pool Heater Propane 200K BTU","description":"\u003c!-- more --\u003e\n\u003cp\u003eThe W3H200FDP is a propane pool heater built for in-ground pools and spas on Hayward's Universal H-Series platform. It delivers 200,000 BTU\/hr of heating output, operates in low ambient temperatures down to 40 degrees F, and connects via 2\" x 2-1\/2\" CPVC union fittings that simplify new installs and replacement jobs. The forced-draft combustion system and low NOx design also qualify it for use in stricter air quality regions including SCAQMD Rule 1146.2 jurisdictions.\u003c\/p\u003e\n\n\u003ch2\u003eW3H200FDP Universal H-Series Propane Pool Heater - Specs and Features\u003c\/h2\u003e\n\u003cp\u003eThe W3H200FDP ships factory-wired for 240V single-phase, 60 Hz power but can be field-converted to 120V by swapping a jumper on the ignition control board. It draws only 5.5 circuit amps with a 15-amp maximum breaker - a minimal electrical footprint for a 200K BTU unit. It supports water flow between 20 and 125 GPM and uses a cupro nickel heat exchanger rated for salt water and chemically demanding pool environments. The cabinet measures 24\" H x 22\" W x 29.5\" L and weighs 140 lb - the most compact and lightest model in the Universal H-Series propane lineup, which makes it easy to work with on tight equipment pads and replacement jobs.\u003c\/p\u003e\n\n\u003ch3\u003eW3H200FDP Installation and Clearance Requirements\u003c\/h3\u003e\n\u003cp\u003eThe W3H200FDP requires 6 inches of rear clearance and 12 inches on each side. The forced-draft design eliminates the need for a high-wind stack, which simplifies positioning in enclosed or semi-enclosed equipment areas. Plumbing connects via 2\" x 2-1\/2\" CPVC union fittings. Before setting the pad, confirm your propane supply line sizing and regulator output match the unit's fuel requirements - undersized supply lines will cause startup and performance issues regardless of how well everything else is installed.\u003c\/p\u003e\n\n\u003ch2\u003eUniversal H-Series Combustion System and Pool Sizing\u003c\/h2\u003e\n\u003cp\u003eThe Universal H-Series platform uses a forced-draft combustion design that pushes air through the chamber at a controlled rate regardless of wind conditions. That removes stack dependency and keeps combustion consistent across installation environments. Hayward's hydraulic design maintains uniform water velocity across all heat exchanger tubes, which produces faster heat-up times and reduced pump run time - Hayward rates that efficiency advantage at up to 18% compared with less efficient gas heater designs. At 200,000 BTU\/hr, this unit is well matched for pools in the 15,000 to 45,000 gallon range, with the upper end being most realistic in warmer climates where the pool holds heat well. For larger pools or faster recovery times, step up to the \u003ca href=\"https:\/\/nonstopswim.com\/products\/hayward-h250-pool-heater-propane-250k-btu\" title=\"Hayward W3H250FDP Propane Pool Heater 250K BTU\"\u003eW3H250FDP\u003c\/a\u003e or \u003ca href=\"https:\/\/nonstopswim.com\/products\/hayward-h400-pool-heater-propane-400k-btu\" title=\"Hayward W3H400FDP Propane Pool Heater 400K BTU\"\u003eW3H400FDP\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eCupro Nickel Heat Exchanger and Salt Water Resistance\u003c\/h3\u003e\n\u003cp\u003eThe W3H200FDP uses a standard cupro nickel heat exchanger, which handles salt water and aggressive pool chemistry better than standard copper alternatives. For pools running salt chlorine generators or elevated sanitizer levels, this is a meaningful spec - heat exchanger corrosion is one of the more common failure points on gas heaters over time. The cupro nickel material also holds up well in coastal installs where airborne salt adds to the chemical load on the unit.\u003c\/p\u003e\n\n\u003ch3\u003eW3H200FDP vs. Larger H-Series Propane Models - Which BTU Do You Need?\u003c\/h3\u003e\n\u003cp\u003eThe W3H200FDP shares the same Universal H-Series platform, electrical requirements, and clearances as the \u003ca href=\"https:\/\/nonstopswim.com\/products\/hayward-h250-pool-heater-propane-250k-btu\" title=\"Hayward W3H250FDP Propane Pool Heater 250K BTU\"\u003eW3H250FDP\u003c\/a\u003e and \u003ca href=\"https:\/\/nonstopswim.com\/products\/hayward-h400-pool-heater-propane-400k-btu\" title=\"Hayward W3H400FDP Propane Pool Heater 400K BTU\"\u003eW3H400FDP\u003c\/a\u003e - the difference is output and physical size. At 140 lb and 22\" wide, the 200K model is a good fit for smaller residential pools up to around 30,000 gallons, or as a dedicated spa heater where fast recovery matters more than raw output. If your pool is larger or you need to heat up quickly from cold, the 250K or 400K model will serve you better. If your site runs natural gas instead of propane, look at the W3H200FDN.\u003c\/p\u003e\n\n\u003ctable\u003e\n  \u003ccaption\u003e\u003cstrong\u003eFull Specifications - Hayward W3H200FDP Propane Pool Heater\u003c\/strong\u003e\u003c\/caption\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eHayward\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eModel \/ SKU\u003c\/td\u003e\n\u003ctd\u003eW3H200FDP\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eUniversal H-Series\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFuel Type\u003c\/td\u003e\n\u003ctd\u003ePropane (LP)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eNew Construction, Renovation, Aftermarket\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePool Type\u003c\/td\u003e\n\u003ctd\u003eIn Ground\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHeating Capacity\u003c\/td\u003e\n\u003ctd\u003e200,000 BTU\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eKilowatts\u003c\/td\u003e\n\u003ctd\u003e59 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHeat Exchanger\u003c\/td\u003e\n\u003ctd\u003eStandard cupro nickel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLow NOx\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCooling Capability\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLow Ambient Operation\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMinimum Operating Temperature\u003c\/td\u003e\n\u003ctd\u003e40 degrees F\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e120\/240V (ships 240V; field-convertible to 120V)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePhase\u003c\/td\u003e\n\u003ctd\u003eSingle\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFrequency\u003c\/td\u003e\n\u003ctd\u003e60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCircuit Amps\u003c\/td\u003e\n\u003ctd\u003e5.5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaximum Breaker Size\u003c\/td\u003e\n\u003ctd\u003e15 Amps\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWater Flow Rate\u003c\/td\u003e\n\u003ctd\u003e20 to 125 GPM\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePlumbing Connections\u003c\/td\u003e\n\u003ctd\u003e2\" x 2-1\/2\" CPVC union\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRear Clearance\u003c\/td\u003e\n\u003ctd\u003e6\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSide Clearance\u003c\/td\u003e\n\u003ctd\u003e12\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProduct Dimensions (H x W x L)\u003c\/td\u003e\n\u003ctd\u003e24\" x 22\" x 29.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProduct Weight\u003c\/td\u003e\n\u003ctd\u003e140 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e30.6\" x 32.8\" x 33.3\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping Weight\u003c\/td\u003e\n\u003ctd\u003e161 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eActive Defrost\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBoost Mode\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSilent Mode\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eChannel\u003c\/td\u003e\n\u003ctd\u003eOpen Line\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e610377387224\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eIs this heater for propane or natural gas?\u003c\/summary\u003e\n  \u003cp\u003ePropane. The W3H200FDP is configured for LP (liquefied propane) only. If your site runs natural gas, you need the W3H200FDN instead. The two are not interchangeable without a conversion, which should be done by a licensed technician.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eWhat size pool can a 200,000 BTU heater handle?\u003c\/summary\u003e\n  \u003cp\u003eAt 200,000 BTU\/hr, this unit is well matched for pools in the 15,000 to 45,000 gallon range. In warm climates like Florida where pools hold heat well, the upper end of that range is very achievable. In colder climates or for pools that sit unused and need fast recovery, size down or consider stepping up to the \u003ca href=\"https:\/\/nonstopswim.com\/products\/hayward-h250-pool-heater-propane-250k-btu\" title=\"Hayward W3H250FDP Propane Pool Heater 250K BTU\"\u003eW3H250FDP\u003c\/a\u003e or \u003ca href=\"https:\/\/nonstopswim.com\/products\/hayward-h400-pool-heater-propane-400k-btu\" title=\"Hayward W3H400FDP Propane Pool Heater 400K BTU\"\u003eW3H400FDP\u003c\/a\u003e will give you faster heat-up and recovery times.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eWhat type of pool is this heater made for?\u003c\/summary\u003e\n  \u003cp\u003eIn-ground pools and spas. It works on new construction, renovation, and aftermarket replacement jobs, and the CPVC union connections make it a practical swap for older H-Series units already plumbed with those fittings.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eWhat electrical service does the W3H200FDP require?\u003c\/summary\u003e\n  \u003cp\u003eIt ships wired for 240V single-phase, 60 Hz with a 15-amp maximum breaker, drawing only 5.5 circuit amps. It can be field-converted to 120V by swapping a jumper on the ignition control board - see the installation manual for that procedure. Either way, the electrical draw is minimal since most of the energy comes from the propane supply, not the grid.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eWhy does the cupro nickel heat exchanger matter for salt pools?\u003c\/summary\u003e\n  \u003cp\u003eSalt water is more corrosive to standard copper than to cupro nickel alloy. On a gas heater that runs at high temperatures, exchanger corrosion accelerates faster than on heat pumps, so the material choice has real long-term impact. Cupro nickel holds up better in salt systems and in pools that run higher sanitizer levels.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eDoes this heater need a special vent stack or chimney?\u003c\/summary\u003e\n  \u003cp\u003eNo. The forced-draft system pushes combustion air through the chamber mechanically, so performance is not dependent on wind or stack height. Indoor and semi-enclosed installations still require proper venting - see the installation manual linked below.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eDoes the W3H200FDP meet low NOx requirements?\u003c\/summary\u003e\n  \u003cp\u003eYes. It meets Low NOx clean air standards including SCAQMD Rule 1146.2, which applies in parts of Southern California and some other air quality districts. If your municipality requires low NOx compliance for pool heaters, this model qualifies.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eW3H200FDP Warranty, Manuals, and Install Documentation\u003c\/h2\u003e\n\u003cp\u003eThe W3H200FDP includes a \u003cstrong\u003e1-year parts warranty\u003c\/strong\u003e with no labor coverage. Review the installation manual before any work begins to confirm gas supply, venting, and clearance requirements are met at the site.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/Hayward-H-Series-Manual.pdf?v=1774482075\" target=\"_blank\" rel=\"noopener noreferrer\" title=\"Hayward W3H200FDP H-Series Propane Pool Heater Installation and Operation Manual\"\u003eHayward H-Series Pool Heater Installation and Operation Manual\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/Hayward-H-Series-Warranty.pdf?v=1774482074\" target=\"_blank\" rel=\"noopener noreferrer\" title=\"Hayward H-Series Pool Heater Warranty Documentation\"\u003eHayward H-Series Pool Heater Warranty Documentation\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":48338387206361,"sku":"W3H200FDP","price":3699.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/Hayward-H200-Pool-Heater-poolside.jpg?v=1774484487"},{"product_id":"hayward-h250-pool-heater-natural-gas-250k-btu","title":"Hayward H250 Pool Heater Natural Gas 250K BTU","description":"\u003c!-- more --\u003e\n\u003cp\u003eThe W3H250FDN is a natural gas pool heater built for in-ground pools and spas on Hayward's Universal H-Series platform. It delivers 250,000 BTU\/hr of heating output, operates in low ambient temperatures down to 40 degrees F, and connects via 2\" x 2-1\/2\" CPVC union fittings that simplify new installs and replacement jobs. The forced-draft combustion system and low NOx design also qualify it for use in stricter air quality regions including SCAQMD Rule 1146.2 jurisdictions.\u003c\/p\u003e\n\n\u003ch2\u003eW3H250FDN Universal H-Series Natural Gas Pool Heater - Specs and Features\u003c\/h2\u003e\n\u003cp\u003eThe W3H250FDN ships factory-wired for 240V single-phase, 60 Hz power but can be field-converted to 120V by swapping a jumper on the ignition control board. It draws only 5.5 circuit amps with a 15-amp maximum breaker - a minimal electrical footprint for a 250K BTU unit. It supports water flow between 25 and 125 GPM and uses a cupro nickel heat exchanger rated for salt water and chemically demanding pool environments. The cabinet measures 24\" H x 25\" W x 29.5\" L and weighs 165 lb - noticeably lighter and narrower than the 400K BTU model, which helps on tighter equipment pads.\u003c\/p\u003e\n\n\u003ch3\u003eW3H250FDN Installation and Clearance Requirements\u003c\/h3\u003e\n\u003cp\u003eThe W3H250FDN requires 6 inches of rear clearance and 12 inches on each side. The forced-draft design eliminates the need for a high-wind stack, which simplifies positioning in enclosed or semi-enclosed equipment areas. Plumbing connects via 2\" x 2-1\/2\" CPVC union fittings. Before setting the pad, confirm your natural gas meter capacity and supply line sizing are sufficient - a 250K BTU heater draws significant gas volume, and undersized piping or a low-capacity meter will cause performance problems at startup.\u003c\/p\u003e\n\n\u003ch2\u003eUniversal H-Series Combustion System and Pool Sizing\u003c\/h2\u003e\n\u003cp\u003eThe Universal H-Series platform uses a forced-draft combustion design that pushes air through the chamber at a controlled rate regardless of wind conditions. That removes stack dependency and keeps combustion consistent across installation environments. Hayward's hydraulic design maintains uniform water velocity across all heat exchanger tubes, which produces faster heat-up times and reduced pump run time - Hayward rates that advantage at up to 18% compared with less efficient gas heater designs. At 250,000 BTU\/hr, this unit is well matched for pools in the 20,000 to 50,000 gallon range in moderate climates, with longer heat-up times on the larger end.\u003c\/p\u003e\n\n\u003ch3\u003eCupro Nickel Heat Exchanger and Salt Water Resistance\u003c\/h3\u003e\n\u003cp\u003eThe W3H250FDN uses a standard cupro nickel heat exchanger, which handles salt water and aggressive pool chemistry better than standard copper alternatives. For pools running salt chlorine generators or elevated sanitizer levels, this is a meaningful spec - heat exchanger corrosion is one of the more common failure points on gas heaters over time. The cupro nickel material also holds up well in coastal installs where airborne salt adds to the chemical load on the unit.\u003c\/p\u003e\n\n\u003ch3\u003eW3H250FDN vs. W3H400FDN - Choosing the Right BTU for Your Pool\u003c\/h3\u003e\n\u003cp\u003eThe W3H250FDN and \u003ca href=\"https:\/\/nonstopswim.com\/products\/hayward-h400-pool-heater-natural-gas-400k-btu\" title=\"Hayward W3H400FDN Natural Gas Pool Heater 400K BTU\"\u003eW3H400FDN\u003c\/a\u003e run on the same Universal H-Series platform with identical electrical, clearance, and plumbing requirements - the difference is output. The 250K model is the right fit for most residential in-ground pools up to around 50,000 gallons in warm climates. Step up to the 400K BTU model if you have a large pool over 50,000 gallons, a pool-spa combination that needs fast spa recovery, or a pool in a colder climate where more BTUs help offset heat loss. If your site runs propane instead of natural gas, the \u003ca href=\"https:\/\/nonstopswim.com\/products\/hayward-h250-pool-heater-propane-250k-btu\" title=\"Hayward W3H250FDP Propane Pool Heater 250K BTU\"\u003eW3H250FDP\u003c\/a\u003e is the LP equivalent of this model on the same platform.\u003c\/p\u003e\n\n\u003ctable\u003e\n  \u003ccaption\u003e\u003cstrong\u003eFull Specifications - Hayward W3H250FDN Natural Gas Pool Heater\u003c\/strong\u003e\u003c\/caption\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eHayward\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eModel \/ SKU\u003c\/td\u003e\n\u003ctd\u003eW3H250FDN\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eUniversal H-Series\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFuel Type\u003c\/td\u003e\n\u003ctd\u003eNatural Gas\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eNew Construction, Renovation\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePool Type\u003c\/td\u003e\n\u003ctd\u003eIn Ground\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHeating Capacity\u003c\/td\u003e\n\u003ctd\u003e250,000 BTU\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eKilowatts\u003c\/td\u003e\n\u003ctd\u003e73 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHeat Exchanger\u003c\/td\u003e\n\u003ctd\u003eStandard cupro nickel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLow NOx\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCooling Capability\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLow Ambient Operation\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMinimum Operating Temperature\u003c\/td\u003e\n\u003ctd\u003e40 degrees F\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e120\/240V (ships 240V; field-convertible to 120V)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePhase\u003c\/td\u003e\n\u003ctd\u003eSingle\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFrequency\u003c\/td\u003e\n\u003ctd\u003e60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCircuit Amps\u003c\/td\u003e\n\u003ctd\u003e5.5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaximum Breaker Size\u003c\/td\u003e\n\u003ctd\u003e15 Amps\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWater Flow Rate\u003c\/td\u003e\n\u003ctd\u003e25 to 125 GPM\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePlumbing Connections\u003c\/td\u003e\n\u003ctd\u003e2\" x 2-1\/2\" CPVC union\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRear Clearance\u003c\/td\u003e\n\u003ctd\u003e6\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSide Clearance\u003c\/td\u003e\n\u003ctd\u003e12\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProduct Dimensions (H x W x L)\u003c\/td\u003e\n\u003ctd\u003e24\" x 25\" x 29.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProduct Weight\u003c\/td\u003e\n\u003ctd\u003e165 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e30.6\" x 32.8\" x 33.3\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping Weight\u003c\/td\u003e\n\u003ctd\u003e171 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eActive Defrost\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBoost Mode\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSilent Mode\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eChannel\u003c\/td\u003e\n\u003ctd\u003eOpen Line\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e610377387231\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eIs this unit for natural gas or propane?\u003c\/summary\u003e\n  \u003cp\u003eNatural gas. The W3H250FDN is configured for natural gas only. If your site runs propane, you need the \u003ca href=\"https:\/\/nonstopswim.com\/products\/hayward-h250-pool-heater-propane-250k-btu\" title=\"Hayward W3H250FDP Propane Pool Heater 250K BTU\"\u003eW3H250FDP\u003c\/a\u003e instead. The two are not interchangeable without a conversion, which should be performed by a licensed technician.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eWhat size pool can a 250,000 BTU heater handle?\u003c\/summary\u003e\n  \u003cp\u003eAt 250,000 BTU\/hr, this unit is well matched for in-ground pools in the 20,000 to 50,000 gallon range in moderate climates. Larger pools or colder climates will see longer heat-up times on the high end of that range. If you have a large pool over 50,000 gallons or need fast spa recovery, the \u003ca href=\"https:\/\/nonstopswim.com\/products\/hayward-h400-pool-heater-natural-gas-400k-btu\" title=\"Hayward W3H400FDN Natural Gas Pool Heater 400K BTU\"\u003eW3H400FDN\u003c\/a\u003e may be a better fit.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eWhat type of pool is this heater made for?\u003c\/summary\u003e\n  \u003cp\u003eIn-ground pools and spas. It works on both new construction and renovation jobs, and the CPVC union connections make it a practical swap for older H-Series units already plumbed with those fittings.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eWhat electrical service does the W3H250FDN require?\u003c\/summary\u003e\n  \u003cp\u003eIt ships wired for 240V single-phase, 60 Hz with a 15-amp maximum breaker, drawing only 5.5 circuit amps. It can be field-converted to 120V by swapping a jumper on the ignition control board - see the installation manual for that procedure. Either way, the electrical draw is minimal since most of the energy comes from the gas supply, not the grid.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eWhy does the cupro nickel heat exchanger matter for salt pools?\u003c\/summary\u003e\n  \u003cp\u003eSalt water is more corrosive to standard copper than to cupro nickel alloy. On a gas heater that runs at high temperatures, exchanger corrosion accelerates faster than on heat pumps, so the material choice has real long-term impact. Cupro nickel holds up better in salt systems and in pools that run higher sanitizer levels.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eDoes this heater need a special vent stack or chimney?\u003c\/summary\u003e\n  \u003cp\u003eNo. The forced-draft system pushes combustion air through the chamber mechanically, so performance is not dependent on wind or stack height. Indoor and semi-enclosed installations still require proper venting - see the installation manual linked below.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eDoes the W3H250FDN meet low NOx requirements?\u003c\/summary\u003e\n  \u003cp\u003eYes. It meets Low NOx clean air standards including SCAQMD Rule 1146.2, which applies in parts of Southern California and some other air quality districts. If your municipality requires low NOx compliance for pool heaters, this model qualifies.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eW3H250FDN Warranty, Manuals, and Install Documentation\u003c\/h2\u003e\n\u003cp\u003eThe W3H250FDN includes a \u003cstrong\u003e1-year parts warranty\u003c\/strong\u003e with no labor coverage. Review the installation manual before any work begins to confirm gas supply, venting, and clearance requirements are met at the site.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/Hayward-H-Series-Manual.pdf?v=1774482075\" target=\"_blank\" rel=\"noopener noreferrer\" title=\"Hayward W3H250FDN H-Series Natural Gas Pool Heater Installation and Operation Manual\"\u003eHayward H-Series Pool Heater Installation and Operation Manual\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/Hayward-H-Series-Warranty.pdf?v=1774482074\" target=\"_blank\" rel=\"noopener noreferrer\" title=\"Hayward H-Series Pool Heater Warranty Documentation\"\u003eHayward H-Series Pool Heater Warranty Documentation\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":48362756833497,"sku":"W3H250FDN","price":3999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/Hayward-H250-Pool-Heater-poolside.jpg?v=1774483947"},{"product_id":"hayward-h250-pool-heater-propane-250k-btu","title":"Hayward H250 Pool Heater Propane 250K BTU","description":"\u003c!-- more --\u003e\n\u003cp\u003eThe W3H250FDP is a propane pool heater built for in-ground pools and spas on Hayward's Universal H-Series platform. It delivers 250,000 BTU\/hr of heating output, operates in low ambient temperatures down to 40 degrees F, and connects via 2\" x 2-1\/2\" CPVC union fittings that simplify new installs and replacement jobs. The forced-draft combustion system and low NOx design also qualify it for use in stricter air quality regions including SCAQMD Rule 1146.2 jurisdictions.\u003c\/p\u003e\n\n\u003ch2\u003eW3H250FDP Universal H-Series Propane Pool Heater - Specs and Features\u003c\/h2\u003e\n\u003cp\u003eThe W3H250FDP ships factory-wired for 240V single-phase, 60 Hz power but can be field-converted to 120V by swapping a jumper on the ignition control board. It draws only 5.5 circuit amps with a 15-amp maximum breaker - a minimal electrical footprint for a 250K BTU unit. It supports water flow between 25 and 125 GPM and uses a cupro nickel heat exchanger rated for salt water and chemically demanding pool environments. The cabinet measures 24\" H x 25\" W x 29.5\" L and weighs 165 lb - noticeably lighter and narrower than the 400K BTU model, which helps on tighter equipment pads.\u003c\/p\u003e\n\n\u003ch3\u003eW3H250FDP Installation and Clearance Requirements\u003c\/h3\u003e\n\u003cp\u003eThe W3H250FDP requires 6 inches of rear clearance and 12 inches on each side. The forced-draft design eliminates the need for a high-wind stack, which simplifies positioning in enclosed or semi-enclosed equipment areas. Plumbing connects via 2\" x 2-1\/2\" CPVC union fittings. Before setting the pad, confirm your propane supply line sizing and regulator output match the unit's fuel requirements - gas heaters are sensitive to inlet pressure, and undersized supply lines will cause startup and performance issues.\u003c\/p\u003e\n\n\u003ch2\u003eUniversal H-Series Combustion System and Pool Sizing\u003c\/h2\u003e\n\u003cp\u003eThe Universal H-Series platform uses a forced-draft combustion design that pushes air through the chamber at a controlled rate regardless of wind conditions. That removes stack dependency and keeps combustion consistent across installation environments. Hayward's hydraulic design maintains uniform water velocity across all heat exchanger tubes, which produces faster heat-up times and reduced pump run time - Hayward rates that advantage at up to 18% compared with less efficient gas heater designs. At 250,000 BTU\/hr, this unit is well matched for pools in the 20,000 to 50,000 gallon range in moderate climates, with longer heat-up times on the larger end.\u003c\/p\u003e\n\n\u003ch3\u003eCupro Nickel Heat Exchanger and Salt Water Resistance\u003c\/h3\u003e\n\u003cp\u003eThe W3H250FDP uses a standard cupro nickel heat exchanger, which handles salt water and aggressive pool chemistry better than standard copper alternatives. For pools running salt chlorine generators or elevated sanitizer levels, this is a meaningful spec - heat exchanger corrosion is one of the more common failure points on gas heaters over time. The cupro nickel material also holds up well in coastal installs where airborne salt adds to the chemical load on the unit.\u003c\/p\u003e\n\n\u003ch3\u003eW3H250FDP vs. W3H400FDP - Choosing the Right BTU for Your Pool\u003c\/h3\u003e\n\u003cp\u003eThe W3H250FDP and \u003ca href=\"https:\/\/nonstopswim.com\/products\/hayward-h400-pool-heater-propane-400k-btu\" title=\"Hayward W3H400FDP Propane Pool Heater 400K BTU\"\u003eW3H400FDP\u003c\/a\u003e run on the same Universal H-Series platform with identical electrical, clearance, and plumbing requirements - the difference is output. The 250K model is the right fit for most residential in-ground pools up to around 50,000 gallons in warm climates. Step up to the 400K BTU model if you have a large pool over 50,000 gallons, a pool-spa combination that needs fast spa recovery, or a pool in a colder climate where more BTUs help offset heat loss. If your site runs natural gas instead of propane, the \u003ca href=\"https:\/\/nonstopswim.com\/products\/hayward-h250-pool-heater-natural-gas-250k-btu\" title=\"Hayward W3H250FDN Natural Gas Pool Heater 250K BTU\"\u003eW3H250FDN\u003c\/a\u003e is the natural gas equivalent of this model on the same platform.\u003c\/p\u003e\n\n\u003ctable\u003e\n  \u003ccaption\u003e\u003cstrong\u003eFull Specifications - Hayward W3H250FDP Propane Pool Heater\u003c\/strong\u003e\u003c\/caption\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eHayward\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eModel \/ SKU\u003c\/td\u003e\n\u003ctd\u003eW3H250FDP\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eUniversal H-Series\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFuel Type\u003c\/td\u003e\n\u003ctd\u003ePropane (LP)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eNew Construction, Aftermarket\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePool Type\u003c\/td\u003e\n\u003ctd\u003eIn Ground\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHeating Capacity\u003c\/td\u003e\n\u003ctd\u003e250,000 BTU\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eKilowatts\u003c\/td\u003e\n\u003ctd\u003e73 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHeat Exchanger\u003c\/td\u003e\n\u003ctd\u003eStandard cupro nickel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLow NOx\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCooling Capability\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLow Ambient Operation\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMinimum Operating Temperature\u003c\/td\u003e\n\u003ctd\u003e40 degrees F\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e120\/240V (ships 240V; field-convertible to 120V)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePhase\u003c\/td\u003e\n\u003ctd\u003eSingle\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFrequency\u003c\/td\u003e\n\u003ctd\u003e60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCircuit Amps\u003c\/td\u003e\n\u003ctd\u003e5.5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaximum Breaker Size\u003c\/td\u003e\n\u003ctd\u003e15 Amps\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWater Flow Rate\u003c\/td\u003e\n\u003ctd\u003e25 to 125 GPM\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePlumbing Connections\u003c\/td\u003e\n\u003ctd\u003e2\" x 2-1\/2\" CPVC union\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRear Clearance\u003c\/td\u003e\n\u003ctd\u003e6\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSide Clearance\u003c\/td\u003e\n\u003ctd\u003e12\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProduct Dimensions (H x W x L)\u003c\/td\u003e\n\u003ctd\u003e24\" x 25\" x 29.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProduct Weight\u003c\/td\u003e\n\u003ctd\u003e165 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e30.6\" x 32.8\" x 33.3\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping Weight\u003c\/td\u003e\n\u003ctd\u003e171 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eActive Defrost\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBoost Mode\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSilent Mode\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eChannel\u003c\/td\u003e\n\u003ctd\u003eOpen Line\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e610377387248\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eIs this unit for propane or natural gas?\u003c\/summary\u003e\n  \u003cp\u003ePropane. The W3H250FDP is configured for LP (liquefied propane) only. If your site runs natural gas, you need the \u003ca href=\"https:\/\/nonstopswim.com\/products\/hayward-h250-pool-heater-natural-gas-250k-btu\" title=\"Hayward W3H250FDN Natural Gas Pool Heater 250K BTU\"\u003eW3H250FDN\u003c\/a\u003e instead. The two are not interchangeable without a conversion, which should be done by a licensed technician.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eWhat size pool can a 250,000 BTU heater handle?\u003c\/summary\u003e\n  \u003cp\u003eAt 250,000 BTU\/hr, this unit is well matched for in-ground pools in the 20,000 to 50,000 gallon range in moderate climates. Larger pools or colder climates will see longer heat-up times on the high end of that range. If you have a large pool over 50,000 gallons or need fast spa recovery, the \u003ca href=\"https:\/\/nonstopswim.com\/products\/hayward-h400-pool-heater-propane-400k-btu\" title=\"Hayward W3H400FDP Propane Pool Heater 400K BTU\"\u003eW3H400FDP\u003c\/a\u003e may be a better fit.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eWhat type of pool is this heater made for?\u003c\/summary\u003e\n  \u003cp\u003eIn-ground pools and spas. It works on both new construction and aftermarket replacement jobs, and the CPVC union connections make it a practical swap for older H-Series units already plumbed with those fittings.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eWhat electrical service does the W3H250FDP require?\u003c\/summary\u003e\n  \u003cp\u003eIt ships wired for 240V single-phase, 60 Hz with a 15-amp maximum breaker, drawing only 5.5 circuit amps. It can be field-converted to 120V by swapping a jumper on the ignition control board - see the installation manual for that procedure. Either way, the electrical draw is minimal since most of the energy comes from the propane supply, not the grid.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eWhy does the cupro nickel heat exchanger matter for salt pools?\u003c\/summary\u003e\n  \u003cp\u003eSalt water is more corrosive to standard copper than to cupro nickel alloy. On a gas heater that runs at high temperatures, exchanger corrosion accelerates faster than on heat pumps, so the material choice has real long-term impact. Cupro nickel holds up better in salt systems and in pools that run higher sanitizer levels.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eDoes this heater need a special vent stack or chimney?\u003c\/summary\u003e\n  \u003cp\u003eNo. The forced-draft system pushes combustion air through the chamber mechanically, so performance is not dependent on wind or stack height. Indoor and semi-enclosed installations still require proper venting - see the installation manual linked below.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eDoes the W3H250FDP meet low NOx requirements?\u003c\/summary\u003e\n  \u003cp\u003eYes. It meets Low NOx clean air standards including SCAQMD Rule 1146.2, which applies in parts of Southern California and some other air quality districts. If your municipality requires low NOx compliance for pool heaters, this model qualifies.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eW3H250FDP Warranty, Manuals, and Install Documentation\u003c\/h2\u003e\n\u003cp\u003eThe W3H250FDP includes a \u003cstrong\u003e1-year parts warranty\u003c\/strong\u003e with no labor coverage. Review the installation manual before any work begins to confirm gas supply, venting, and clearance requirements are met at the site.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/Hayward-H-Series-Manual.pdf?v=1774482075\" target=\"_blank\" rel=\"noopener noreferrer\" title=\"Hayward W3H250FDP H-Series Propane Pool Heater Installation and Operation Manual\"\u003eHayward H-Series Pool Heater Installation and Operation Manual\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/Hayward-H-Series-Warranty.pdf?v=1774482074\" target=\"_blank\" rel=\"noopener noreferrer\" title=\"Hayward H-Series Pool Heater Warranty Documentation\"\u003eHayward H-Series Pool Heater Warranty Documentation\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":48363108106457,"sku":"W3H250FDP","price":3999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/Hayward-H250-Pool-Heater-poolside.jpg?v=1774483947"},{"product_id":"hayward-h400-pool-heater-natural-gas-400k-btu","title":"Hayward H400 Pool Heater Natural Gas 400K BTU","description":"\u003c!-- more --\u003e\n\u003cp\u003eThe W3H400FDN is a natural gas pool heater built for in-ground pools and spas on Hayward's Universal H-Series platform. It delivers 400,000 BTU\/hr of heating output, operates in low ambient temperatures down to 40 degrees F, and connects via 2\" x 2-1\/2\" CPVC union fittings that simplify replacement and retrofit installs. The forced-draft combustion system and low NOx design also qualify it for use in stricter air quality regions including SCAQMD Rule 1146.2 jurisdictions.\u003c\/p\u003e\n\u003ch2\u003eW3H400FDN Universal H-Series Natural Gas Pool Heater - Specs and Features\u003c\/h2\u003e\n\u003cp\u003eThe W3H400FDN ships factory-wired for 240V single-phase, 60 Hz power but can be field-converted to 120V by swapping a jumper on the ignition control board. It draws only 5.5 circuit amps with a 15-amp maximum breaker - a minimal electrical footprint for a 400K BTU unit. It supports water flow between 30 and 125 GPM and uses a cupro nickel heat exchanger rated for salt water and chemically demanding pool environments. The cabinet measures 24\" H x 34\" W x 29.5\" L and weighs 195 lb.\u003c\/p\u003e\n\u003ch3\u003eW3H400FDN Installation and Clearance Requirements\u003c\/h3\u003e\n\u003cp\u003eThe W3H400FDN requires 6 inches of rear clearance and 12 inches on each side. The forced-draft design eliminates the need for a high-wind stack, which simplifies positioning on tight equipment pads. Plumbing connects via 2\" x 2-1\/2\" CPVC union fittings. Before setting the pad, confirm your natural gas meter capacity and supply line sizing are sufficient - a 400K BTU heater draws significant gas volume, and undersized piping or a low-capacity meter will cause performance problems at startup.\u003c\/p\u003e\n\u003ch2\u003eUniversal H-Series Combustion System and Efficiency\u003c\/h2\u003e\n\u003cp\u003eThe Universal H-Series platform uses a forced-draft combustion design that pushes air through the chamber at a controlled rate regardless of wind conditions. That removes stack dependency and keeps combustion consistent across installation environments. Hayward's hydraulic design maintains uniform water velocity across all heat exchanger tubes, which produces faster heat-up times and reduces pump run time. Hayward rates the efficiency advantage at up to 18% compared with less efficient gas heater designs.\u003c\/p\u003e\n\u003ch3\u003eCupro Nickel Heat Exchanger and Chemical Resistance\u003c\/h3\u003e\n\u003cp\u003eThe W3H400FDN uses a standard cupro nickel heat exchanger, which handles salt water and aggressive pool chemistry better than standard copper alternatives. For pools running salt chlorine generators or elevated sanitizer levels, this is a meaningful spec - heat exchanger corrosion is one of the more common failure points on gas heaters over time. The cupro nickel material also holds up well in coastal installs where airborne salt adds to the chemical load on the unit.\u003c\/p\u003e\n\u003ch3\u003eW3H400FDN Natural Gas Heater vs. Heat Pump - Which Is Right for Your Pool?\u003c\/h3\u003e\n\u003cp\u003eGas heaters like the W3H400FDN heat water faster than heat pumps and maintain full output regardless of air temperature. That makes them the better choice for pools that sit unused for long stretches and need to heat up quickly, or for year-round pools in cold climates where heat pump efficiency drops off. The tradeoff is operating cost: natural gas burns continuously during use, while heat pumps move heat from the air and use far less energy per BTU delivered in moderate weather. Natural gas is generally cheaper to run than propane, which gives the W3H400FDN a cost advantage over the LP version in most markets. For pools in mild climates used regularly, a heat pump handles day-to-day heating more efficiently - but for large pools, spas, or any setup where fast recovery matters more than efficiency, a 400K BTU gas heater is hard to beat.\u003c\/p\u003e\n\u003ctable\u003e\n\u003ccaption\u003e\u003cstrong\u003eFull Specifications - Hayward W3H400FDN Natural Gas Pool Heater\u003c\/strong\u003e\u003c\/caption\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eHayward\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel \/ SKU\u003c\/td\u003e\n\u003ctd\u003eW3H400FDN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eUniversal H-Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel Type\u003c\/td\u003e\n\u003ctd\u003eNatural Gas\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eNew Construction, Renovation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePool Type\u003c\/td\u003e\n\u003ctd\u003eIn Ground\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeating Capacity\u003c\/td\u003e\n\u003ctd\u003e400,000 BTU\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKilowatts\u003c\/td\u003e\n\u003ctd\u003e117 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat Exchanger\u003c\/td\u003e\n\u003ctd\u003eStandard cupro nickel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLow NOx\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling Capability\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLow Ambient Operation\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Operating Temperature\u003c\/td\u003e\n\u003ctd\u003e40 degrees F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e120\/240V (ships 240V; field-convertible to 120V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhase\u003c\/td\u003e\n\u003ctd\u003eSingle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency\u003c\/td\u003e\n\u003ctd\u003e60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit Amps\u003c\/td\u003e\n\u003ctd\u003e5.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Breaker Size\u003c\/td\u003e\n\u003ctd\u003e15 Amps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater Flow Rate\u003c\/td\u003e\n\u003ctd\u003e30 to 125 GPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePlumbing Connections\u003c\/td\u003e\n\u003ctd\u003e2\" x 2-1\/2\" CPVC union\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear Clearance\u003c\/td\u003e\n\u003ctd\u003e6\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSide Clearance\u003c\/td\u003e\n\u003ctd\u003e12\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Dimensions (H x W x L)\u003c\/td\u003e\n\u003ctd\u003e24\" x 34\" x 29.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Weight\u003c\/td\u003e\n\u003ctd\u003e195 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e30.6\" x 32.8\" x 39.6\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Weight\u003c\/td\u003e\n\u003ctd\u003e214 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActive Defrost\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoost Mode\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSilent Mode\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel\u003c\/td\u003e\n\u003ctd\u003eOpen Line\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e610377387255\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this heater natural gas or propane?\u003c\/summary\u003e\n\u003cp\u003eNatural gas. The W3H400FDN is configured for natural gas only. If your site runs propane, you need the LP version instead. The two are not interchangeable without a conversion, and that work should be done by a licensed technician.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat pools and spas is this heater designed for?\u003c\/summary\u003e\n\u003cp\u003eIn-ground pools and spas. It works on both new construction and existing equipment pads, and the CPVC union connections make it a practical replacement for older H-Series units already plumbed with those fittings.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat electrical service does the W3H400FDN require?\u003c\/summary\u003e\n\u003cp\u003eIt ships wired for 240V single-phase, 60 Hz with a 15-amp maximum breaker, drawing only 5.5 circuit amps. It can be field-converted to 120V by swapping a jumper on the ignition control board - see the installation manual for that procedure. Either way, the electrical draw is minimal for a 400K BTU unit since most of the energy comes from the gas line, not the grid.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhy does the cupro nickel heat exchanger matter for salt pools?\u003c\/summary\u003e\n\u003cp\u003eSalt water is more corrosive to standard copper than to cupro nickel alloy. On a gas heater that runs at high temperatures, exchanger corrosion accelerates faster than on heat pumps, so the material choice has real long-term impact. Cupro nickel holds up better in salt systems and in pools that run higher sanitizer levels.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes this heater need a special vent stack or chimney?\u003c\/summary\u003e\n\u003cp\u003eNo. The forced-draft system pushes combustion air through the chamber mechanically, so performance is not dependent on wind or stack height. That said, indoor and semi-enclosed installations still require proper venting - see the installation manual linked below.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes the W3H400FDN meet low NOx requirements?\u003c\/summary\u003e\n\u003cp\u003eYes. It meets Low NOx clean air standards including SCAQMD Rule 1146.2, which applies in parts of Southern California and some other air quality districts. If your municipality requires low NOx compliance for pool heaters, this model qualifies.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003ch2\u003eW3H400FDN Warranty, Manuals, and Install Documentation\u003c\/h2\u003e\n\u003cp\u003eThe W3H400FDN includes a \u003cstrong\u003e1-year parts warranty\u003c\/strong\u003e. Review the installation manual before any work begins to confirm gas supply, venting, and clearance requirements are met at the site.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca title=\"Hayward W3H400FDN H-Series Natural Gas Pool Heater Installation and Operation Manual\" rel=\"noopener noreferrer\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/Hayward-H-Series-Manual.pdf?v=1774482075\" target=\"_blank\"\u003eHayward H-Series Pool Heater Installation and Operation Manual\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca title=\"Hayward H-Series Pool Heater Warranty Documentation\" rel=\"noopener noreferrer\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/Hayward-H-Series-Warranty.pdf?v=1774482074\" target=\"_blank\"\u003eHayward H-Series Pool Heater Warranty Documentation\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":48371671040217,"sku":"W3H400FDN","price":5099.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/Hayward-H400-pool-heater-poolside.jpg?v=1774483074"},{"product_id":"hayward-h400-pool-heater-propane-400k-btu","title":"Hayward H400 Pool Heater Propane 400K BTU","description":"\u003c!-- more --\u003e\n\u003cp\u003eThe W3H400FDP is a propane pool heater built for in-ground pools and spas on Hayward's Universal H-Series platform. It delivers 400,000 BTU\/hr of heating output, runs on low ambient temperatures down to 40 degrees F, and connects via 2\" x 2-1\/2\" CPVC union fittings that make replacement and retrofit installs straightforward. The forced-draft combustion system and low NOx design also qualify it for use in stricter air quality regions including SCAQMD Rule 1146.2 jurisdictions.\u003c\/p\u003e\n\u003ch2\u003eW3H400FDP Universal H-Series Gas Pool Heater - Specs and Features\u003c\/h2\u003e\n\u003cp\u003eThe W3H400FDP runs on 120\/240V single-phase, 60 Hz power and draws only 5.5 circuit amps with a 15-amp maximum breaker - a minimal electrical footprint for a 400K BTU unit. It supports water flow between 30 and 125 GPM and uses a cupro nickel heat exchanger rated for salt water and chemically demanding pool environments. The cabinet measures 24\" H x 34\" W x 29.5\" L and weighs 195 lb.\u003c\/p\u003e\n\u003ch3\u003eW3H400FDP Installation and Clearance Requirements\u003c\/h3\u003e\n\u003cp\u003eThe W3H400FDP requires 6 inches of rear clearance and 12 inches on each side. There is no vertical clearance listed, but the forced-draft design eliminates the need for a high-wind stack, which simplifies positioning on tight equipment pads. Plumbing connects via 2\" x 2-1\/2\" CPVC union fittings. Confirm your propane supply line sizing and regulator output match the unit's fuel requirements before setting the pad - gas heaters are sensitive to inlet pressure in ways that heat pumps are not.\u003c\/p\u003e\n\u003ch2\u003eUniversal H-Series Combustion System and Efficiency\u003c\/h2\u003e\n\u003cp\u003eThe Universal H-Series platform uses a forced-draft combustion design that pushes air through the chamber at a controlled rate regardless of wind conditions. That removes stack dependency and keeps combustion consistent across installation environments. Hayward's hydraulic design also maintains uniform water velocity across all heat exchanger tubes, which translates to faster heat-up times and reduced pump run time. Hayward rates the efficiency advantage at up to 18% compared with less efficient gas heater designs.\u003c\/p\u003e\n\u003ch3\u003eCupro Nickel Heat Exchanger and Chemical Resistance\u003c\/h3\u003e\n\u003cp\u003eThe W3H400FDP uses a standard cupro nickel heat exchanger, which handles salt water and aggressive pool chemistry better than standard copper alternatives. For pools running salt chlorine generators or elevated sanitizer levels, this is a meaningful spec - heat exchanger corrosion is one of the more common failure points on gas heaters over time. The cupro nickel material also holds up well in coastal installs where airborne salt adds to the chemical load on the unit.\u003c\/p\u003e\n\u003ch3\u003eW3H400FDP Propane Gas Heater vs. Heat Pump - Which Is Right for Your Pool?\u003c\/h3\u003e\n\u003cp\u003eGas heaters like the W3H400FDP heat water faster than heat pumps and maintain full output regardless of air temperature. That makes them the better choice for pools that sit unused for long stretches and need to heat up quickly, or for year-round pools in cold climates where heat pump efficiency drops off. The tradeoff is operating cost: propane burns continuously during use, while heat pumps move heat from the air and use far less energy per BTU delivered in moderate weather. For pools in Florida or similarly warm climates, a heat pump handles day-to-day heating more cheaply, and a gas heater like this one is best used as a primary heater for large pools, spas, or any setup where fast recovery matters more than efficiency.\u003c\/p\u003e\n\u003ctable\u003e\n\u003ccaption\u003e\u003cstrong\u003eFull Specifications - Hayward W3H400FDP Propane Pool Heater\u003c\/strong\u003e\u003c\/caption\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eHayward\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel \/ SKU\u003c\/td\u003e\n\u003ctd\u003eW3H400FDP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eUniversal H-Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel Type\u003c\/td\u003e\n\u003ctd\u003ePropane (LP)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eNew Construction, Existing Pool or Spa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePool Type\u003c\/td\u003e\n\u003ctd\u003eIn Ground\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeating Capacity\u003c\/td\u003e\n\u003ctd\u003e400,000 BTU\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKilowatts\u003c\/td\u003e\n\u003ctd\u003e117 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat Exchanger\u003c\/td\u003e\n\u003ctd\u003eStandard cupro nickel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLow NOx\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling Capability\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLow Ambient Operation\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Operating Temperature\u003c\/td\u003e\n\u003ctd\u003e40 degrees F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e120\/240V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhase\u003c\/td\u003e\n\u003ctd\u003eSingle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency\u003c\/td\u003e\n\u003ctd\u003e60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit Amps\u003c\/td\u003e\n\u003ctd\u003e5.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Breaker Size\u003c\/td\u003e\n\u003ctd\u003e15 Amps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater Flow Rate\u003c\/td\u003e\n\u003ctd\u003e30 to 125 GPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePlumbing Connections\u003c\/td\u003e\n\u003ctd\u003e2\" x 2-1\/2\" CPVC union\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear Clearance\u003c\/td\u003e\n\u003ctd\u003e6\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSide Clearance\u003c\/td\u003e\n\u003ctd\u003e12\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Dimensions (H x W x L)\u003c\/td\u003e\n\u003ctd\u003e24\" x 34\" x 29.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Weight\u003c\/td\u003e\n\u003ctd\u003e195 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e30.6\" x 32.8\" x 39.6\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Weight\u003c\/td\u003e\n\u003ctd\u003e214 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActive Defrost\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoost Mode\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSilent Mode\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel\u003c\/td\u003e\n\u003ctd\u003eOpen Line\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e610377387279\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this unit propane or natural gas?\u003c\/summary\u003e\n\u003cp\u003ePropane. The W3H400FDP is configured for LP (liquefied propane) only. If your site runs natural gas, you need the natural gas variant - the two are not interchangeable without a conversion kit, and field conversions should be done by a licensed technician.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat pools and spas is this heater designed for?\u003c\/summary\u003e\n\u003cp\u003eIn-ground pools and spas. It works on both new construction and existing equipment pads, and the CPVC union connections make it a practical replacement for older H-Series units already plumbed with those fittings.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat electrical service does the W3H400FDP require?\u003c\/summary\u003e\n\u003cp\u003eA 120\/240V single-phase circuit drawing 5.5 amps, with a 15-amp maximum breaker. For a 400K BTU heater, that is a very small electrical requirement - most of the energy comes from propane, not the grid.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhy does the cupro nickel heat exchanger matter for salt pools?\u003c\/summary\u003e\n\u003cp\u003eSalt water is more corrosive to standard copper than to cupro nickel alloy. On a gas heater that runs at high temperatures, exchanger corrosion accelerates faster than on heat pumps, so the material choice has real long-term impact. Cupro nickel holds up better in salt systems and in pools that run higher sanitizer levels.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes this heater need a special vent stack or chimney?\u003c\/summary\u003e\n\u003cp\u003eNo. The forced-draft system pushes combustion air through the chamber mechanically, so performance is not dependent on wind or stack height. That said, indoor and semi-enclosed installations still require proper venting - see the indoor vent kit instructions linked below.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes the W3H400FDP meet low NOx requirements?\u003c\/summary\u003e\n\u003cp\u003eYes. It meets Low NOx clean air standards including SCAQMD Rule 1146.2, which applies in parts of Southern California and some other air quality districts. If your municipality requires low NOx compliance for pool heaters, this model qualifies.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003ch2\u003eW3H400FDP Warranty, Manuals, and Install Documentation\u003c\/h2\u003e\n\u003cp\u003eThe W3H400FDP includes a \u003cstrong\u003e1-year parts warranty\u003c\/strong\u003e with no labor coverage. Review the installation manual and confirm gas supply, venting, and clearance requirements are met before the unit is started up.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/pdf-icon_32x32.png?v=1712690112\" style=\"margin-bottom: 1px; float: none;\"\u003e\u003ca title=\"Hayward W3H400FDP H-Series Pool Heater Installation and Operation Manual\" rel=\"noopener noreferrer\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/Hayward-H-Series-Manual.pdf?v=1774482075\" target=\"_blank\"\u003eHayward H-Series Pool Heater Installation and Operation Manual\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/pdf-icon_32x32.png?v=1712690112\" style=\"margin-bottom: 1px; float: none;\"\u003e\u003ca title=\"Hayward H-Series Pool Heater Warranty Documentation\" rel=\"noopener noreferrer\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/Hayward-H-Series-Warranty.pdf?v=1774482074\" target=\"_blank\"\u003eHayward H-Series Pool Heater Warranty Documentation\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":48371917357273,"sku":"W3H400FDP","price":5099.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/Hayward-H400-pool-heater-poolside.jpg?v=1774483074"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/collections\/Hayward-H400-pool-heater-poolside_1a42d838-3dad-4d9c-b62f-9e23a90996b6.jpg?v=1774653516","url":"https:\/\/nonstopswim.com\/collections\/pool-heaters-for-30-000-gallon-pools-and-up\/pool-size_over-30k-gallons.oembed","provider":"Nonstop Swim","version":"1.0","type":"link"}