{"product_id":"hayward-250-000-btu-universal-forced-draft-h-series-natural-gas-pool-heater","title":"Hayward Pool Heater Universal H-Series Natural Gas Low NOx | 250,000 BTU","description":"\u003cdiv style=\"text-align: left;\"\u003e\n\u003cp data-start=\"543\" data-end=\"951\"\u003eThe \u003cstrong data-start=\"547\" data-end=\"632\"\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eHayward Universal H-Series\u003c\/span\u003e\u003c\/span\u003e Low NOx Natural Gas Pool Heater (W3H250FDN)\u003c\/strong\u003e is a \u003cstrong data-start=\"638\" data-end=\"685\"\u003e250,000 BTU residential pool and spa heater\u003c\/strong\u003e designed to deliver fast, consistent heating performance for \u003cstrong data-start=\"747\" data-end=\"783\"\u003einground swimming pools and spas\u003c\/strong\u003e. Manufactured by Hayward—one of the most trusted names in pool heating—this model combines dependable output with modern emissions compliance and long-term durability.\u003c\/p\u003e\n\u003cp data-start=\"953\" data-end=\"1457\"\u003eWith a \u003cstrong data-start=\"960\" data-end=\"989\"\u003e250K BTU heating capacity\u003c\/strong\u003e, this heater is well suited for \u003cstrong data-start=\"1022\" data-end=\"1056\"\u003emedium to large inground pools\u003c\/strong\u003e, providing quicker heat-up times and improved temperature recovery compared to lower-BTU models. The \u003cstrong data-start=\"1158\" data-end=\"1188\"\u003eelectronic ignition system\u003c\/strong\u003e ensures reliable, pilot-free startups, improving efficiency and reducing unnecessary gas usage. A \u003cstrong data-start=\"1287\" data-end=\"1318\"\u003ecupro-nickel heat exchanger\u003c\/strong\u003e offers enhanced resistance to corrosion and scale, making it an excellent option for both traditional chlorine and saltwater pool systems.\u003c\/p\u003e\n\u003cp data-start=\"1459\" data-end=\"1775\"\u003eDesigned to meet \u003cstrong data-start=\"1476\" data-end=\"1507\"\u003eLow NOx emissions standards\u003c\/strong\u003e, the Universal H-Series balances environmental responsibility with proven Hayward engineering. Its compact footprint and service-friendly design make the W3H250FDN a popular choice among pool professionals for residential heating applications requiring higher output.\u003c\/p\u003e\n\u003ch3 data-start=\"1777\" data-end=\"1806\"\u003eKey Heater Specifications\u003c\/h3\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"1808\" data-end=\"2136\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"1808\" data-end=\"1835\"\u003e\n\u003ctr data-start=\"1808\" data-end=\"1835\"\u003e\n\u003cth data-start=\"1808\" data-end=\"1824\" data-col-size=\"sm\"\u003eSpecification\u003c\/th\u003e\n\u003cth data-start=\"1824\" data-end=\"1835\" data-col-size=\"sm\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"1862\" data-end=\"2136\"\u003e\n\u003ctr data-start=\"1862\" data-end=\"1894\"\u003e\n\u003ctd data-start=\"1862\" data-end=\"1879\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1864\" data-end=\"1878\"\u003eBTU Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1879\" data-end=\"1894\"\u003e250,000 BTU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1895\" data-end=\"1926\"\u003e\n\u003ctd data-start=\"1895\" data-end=\"1911\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1897\" data-end=\"1910\"\u003eFuel Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"1911\" data-end=\"1926\" data-col-size=\"sm\"\u003eNatural Gas\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1927\" data-end=\"1970\"\u003e\n\u003ctd data-start=\"1927\" data-end=\"1947\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1929\" data-end=\"1946\"\u003eIgnition Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"1947\" data-end=\"1970\" data-col-size=\"sm\"\u003eElectronic Ignition\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1971\" data-end=\"2017\"\u003e\n\u003ctd data-start=\"1971\" data-end=\"2001\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1973\" data-end=\"2000\"\u003eHeat Exchanger Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"2001\" data-end=\"2017\" data-col-size=\"sm\"\u003eCupro-Nickel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2018\" data-end=\"2062\"\u003e\n\u003ctd data-start=\"2018\" data-end=\"2041\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2020\" data-end=\"2040\"\u003eEmissions Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"2041\" data-end=\"2062\" data-col-size=\"sm\"\u003eLow NOx Compliant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2063\" data-end=\"2102\"\u003e\n\u003ctd data-start=\"2063\" data-end=\"2079\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2065\" data-end=\"2078\"\u003ePool Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2079\" data-end=\"2102\"\u003eInground Pool \u0026amp; Spa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2103\" data-end=\"2136\"\u003e\n\u003ctd data-start=\"2103\" data-end=\"2121\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2105\" data-end=\"2120\"\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2121\" data-end=\"2136\"\u003eResidential\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr data-start=\"2138\" data-end=\"2141\"\u003e\n\u003ch2 data-start=\"2143\" data-end=\"2181\"\u003eAlternate Part Number\u003c\/h2\u003e\n\u003cul data-start=\"2183\" data-end=\"2283\"\u003e\n\u003cli data-start=\"2183\" data-end=\"2227\"\u003e\n\u003cp data-start=\"2185\" data-end=\"2227\"\u003e\u003cstrong data-start=\"2185\" data-end=\"2196\"\u003eH250FDN\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2285\" data-end=\"2288\"\u003e\n\u003ch2 data-start=\"2290\" data-end=\"2326\"\u003eFrequently Asked Questions (FAQs)\u003c\/h2\u003e\n\u003ch3 data-start=\"2328\" data-end=\"2374\"\u003eWhat size pools is the W3H250FDN best for?\u003c\/h3\u003e\n\u003cp data-start=\"2375\" data-end=\"2520\"\u003eThis 250,000 BTU heater is ideal for \u003cstrong data-start=\"2412\" data-end=\"2455\"\u003emedium to large inground pools and spas\u003c\/strong\u003e, especially where faster heat-up and recovery times are desired.\u003c\/p\u003e\n\u003ch3 data-start=\"2522\" data-end=\"2568\"\u003eWhat ignition system does this heater use?\u003c\/h3\u003e\n\u003cp data-start=\"2569\" data-end=\"2685\"\u003eThe heater uses \u003cstrong data-start=\"2585\" data-end=\"2608\"\u003eelectronic ignition\u003c\/strong\u003e, eliminating the need for a standing pilot and improving overall efficiency.\u003c\/p\u003e\n\u003ch3 data-start=\"2687\" data-end=\"2738\"\u003eIs this heater compatible with saltwater pools?\u003c\/h3\u003e\n\u003cp data-start=\"2739\" data-end=\"2866\"\u003eYes. The \u003cstrong data-start=\"2748\" data-end=\"2779\"\u003ecupro-nickel heat exchanger\u003c\/strong\u003e provides enhanced corrosion resistance, making it suitable for saltwater pool systems.\u003c\/p\u003e\n\u003ch3 data-start=\"2868\" data-end=\"2915\"\u003eDoes this heater meet Low NOx requirements?\u003c\/h3\u003e\n\u003cp data-start=\"2916\" data-end=\"3012\"\u003eYes. The W3H250FDN is designed to comply with \u003cstrong data-start=\"2962\" data-end=\"2995\"\u003eLow NOx emissions regulations\u003c\/strong\u003e, where required.\u003c\/p\u003e\n\u003ch3 data-start=\"3014\" data-end=\"3059\"\u003eIs professional installation recommended?\u003c\/h3\u003e\n\u003cp data-start=\"3060\" data-end=\"3176\"\u003eYes. Professional installation is strongly recommended to ensure proper gas supply, ventilation, and safe operation.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Hayward","offers":[{"title":"NONE","offer_id":42855239843998,"sku":"W3H250FDN","price":4169.0,"currency_code":"CAD","in_stock":true},{"title":"Hayward Negative Venting Kit","offer_id":42855239876766,"sku":"W3H250FDN \/ UHXNEGVT12506","price":4249.0,"currency_code":"CAD","in_stock":true},{"title":"Hayward 6 Pos Press Indoor Venting Kit","offer_id":42855239909534,"sku":"W3H250FDN \/ UHXPOSHZ12506","price":4249.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0071\/8559\/6477\/files\/Hayward_H-Series-01_f33fad93-bfa6-4583-894e-0e852b98a78c.webp?v=1753990173","url":"https:\/\/kjleisure.com\/products\/hayward-250-000-btu-universal-forced-draft-h-series-natural-gas-pool-heater","provider":"K\u0026J Leisure","version":"1.0","type":"link"}