{"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","url":"https:\/\/nonstopswim.com\/products\/hayward-h150-pool-heater-natural-gas-150k-btu","provider":"Nonstop Swim","version":"1.0","type":"link"}