{"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","url":"https:\/\/nonstopswim.com\/products\/hayward-h250-pool-heater-propane-250k-btu","provider":"Nonstop Swim","version":"1.0","type":"link"}