{"product_id":"hayward-universal-h-series-pool-heater-h400fdn","title":"Hayward Universal H-Series Pool Heater H400FDN","description":"\u003ch2 data-section-id=\"7n3oi8\" data-start=\"236\" data-end=\"252\"\u003e🔥 Core Specs\u003c\/h2\u003e\\n\u003cul data-start=\"253\" data-end=\"478\"\u003e\\n\u003cli data-section-id=\"xawxj5\" data-start=\"253\" data-end=\"303\"\u003e\n\u003cstrong data-start=\"255\" data-end=\"265\"\u003eModel:\u003c\/strong\u003e H400FDN (also W3H400FDN newer number)\u003c\/li\u003e\\n\u003cli data-section-id=\"12rjigw\" data-start=\"304\" data-end=\"346\"\u003e\n\u003cstrong data-start=\"306\" data-end=\"327\"\u003eHeating Capacity:\u003c\/strong\u003e \u003cstrong data-start=\"328\" data-end=\"346\"\u003e400,000 BTU\/hr\u003c\/strong\u003e\n\u003c\/li\u003e\\n\u003cli data-section-id=\"778pqs\" data-start=\"347\" data-end=\"375\"\u003e\n\u003cstrong data-start=\"349\" data-end=\"363\"\u003eFuel Type:\u003c\/strong\u003e Natural Gas\u003c\/li\u003e\\n\u003cli data-section-id=\"1bl9076\" data-start=\"376\" data-end=\"425\"\u003e\n\u003cstrong data-start=\"378\" data-end=\"391\"\u003eIgnition:\u003c\/strong\u003e Electronic (IID – no pilot light)\u003c\/li\u003e\\n\u003cli data-section-id=\"185kx1i\" data-start=\"426\" data-end=\"478\"\u003e\n\u003cstrong data-start=\"428\" data-end=\"442\"\u003eEmissions:\u003c\/strong\u003e Low NOx (environmentally compliant)\u003c\/li\u003e\\n\u003c\/ul\u003e\\n\u003chr data-start=\"480\" data-end=\"483\"\u003e\\n\u003ch2 data-section-id=\"1cosqy4\" data-start=\"485\" data-end=\"514\"\u003e🏊 What size pool it’s for\u003c\/h2\u003e\\n\u003cul data-start=\"515\" data-end=\"700\"\u003e\\n\u003cli data-section-id=\"aktb75\" data-start=\"515\" data-end=\"601\"\u003eIdeal for:\\n\u003cul data-start=\"530\" data-end=\"601\"\u003e\\n\u003cli data-section-id=\"1cveogm\" data-start=\"530\" data-end=\"566\"\u003e\u003cstrong data-start=\"532\" data-end=\"566\"\u003e20,000 to 40,000+ gallon pools\u003c\/strong\u003e\u003c\/li\u003e\\n\u003cli data-section-id=\"1bc88nf\" data-start=\"569\" data-end=\"601\"\u003eLarge spas + pool combo setups\u003c\/li\u003e\\n\u003c\/ul\u003e\\n\u003c\/li\u003e\\n\u003cli data-section-id=\"mf0rwh\" data-start=\"602\" data-end=\"700\"\u003eVery fast recovery heater:\\n\u003cul data-start=\"633\" data-end=\"700\"\u003e\\n\u003cli data-section-id=\"vwels8\" data-start=\"633\" data-end=\"700\"\u003eCan raise temp roughly \u003cstrong data-start=\"658\" data-end=\"676\"\u003e1–2°F per hour\u003c\/strong\u003e depending on conditions\u003c\/li\u003e\\n\u003c\/ul\u003e\\n\u003c\/li\u003e\\n\u003c\/ul\u003e\\n\u003chr data-start=\"702\" data-end=\"705\"\u003e\\n\u003ch2 data-section-id=\"1ibzexv\" data-start=\"707\" data-end=\"725\"\u003e⚙️ Key Features\u003c\/h2\u003e\\n\u003ch3 data-section-id=\"homy05\" data-start=\"727\" data-end=\"764\"\u003e🔩 Heat exchanger (big advantage)\u003c\/h3\u003e\\n\u003cul data-start=\"765\" data-end=\"896\"\u003e\\n\u003cli data-section-id=\"1wwr0tl\" data-start=\"765\" data-end=\"798\"\u003e\u003cstrong data-start=\"767\" data-end=\"798\"\u003eCupro-nickel heat exchanger\u003c\/strong\u003e\u003c\/li\u003e\\n\u003cli data-section-id=\"16ius4i\" data-start=\"799\" data-end=\"896\"\u003eExcellent for:\\n\u003cul data-start=\"818\" data-end=\"896\"\u003e\\n\u003cli data-section-id=\"1my6tdk\" data-start=\"818\" data-end=\"835\"\u003eSaltwater pools\u003c\/li\u003e\\n\u003cli data-section-id=\"i1e3uq\" data-start=\"838\" data-end=\"861\"\u003eHard water conditions\u003c\/li\u003e\\n\u003cli data-section-id=\"bxgbkq\" data-start=\"864\" data-end=\"896\"\u003eLong-term corrosion resistance\u003c\/li\u003e\\n\u003c\/ul\u003e\\n\u003c\/li\u003e\\n\u003c\/ul\u003e\\n\u003ch3 data-section-id=\"1j7j3uo\" data-start=\"898\" data-end=\"932\"\u003e🌊 Hydraulic efficiency design\u003c\/h3\u003e\\n\u003cul data-start=\"933\" data-end=\"1084\"\u003e\\n\u003cli data-section-id=\"1x4q4z0\" data-start=\"933\" data-end=\"964\"\u003e“Totally Managed Flow” system\u003c\/li\u003e\\n\u003cli data-section-id=\"v49f66\" data-start=\"965\" data-end=\"1016\"\u003eReduces pump runtime (up to ~18% savings claimed)\u003c\/li\u003e\\n\u003cli data-section-id=\"12645z3\" data-start=\"1017\" data-end=\"1084\"\u003eImproves heating efficiency by balancing water flow through tubes\u003c\/li\u003e\\n\u003c\/ul\u003e\\n\u003ch3 data-section-id=\"1wqumhw\" data-start=\"1086\" data-end=\"1114\"\u003e⚡ Controls \u0026amp; electronics\u003c\/h3\u003e\\n\u003cul data-start=\"1115\" data-end=\"1233\"\u003e\\n\u003cli data-section-id=\"1h12mry\" data-start=\"1115\" data-end=\"1142\"\u003eDigital LED control panel\u003c\/li\u003e\\n\u003cli data-section-id=\"qwna6u\" data-start=\"1143\" data-end=\"1191\"\u003eSelf-diagnostics (error codes like IF, LO, HS)\u003c\/li\u003e\\n\u003cli data-section-id=\"1qdwc2h\" data-start=\"1192\" data-end=\"1233\"\u003eCompatible with pool automation systems\u003c\/li\u003e\\n\u003c\/ul\u003e\\n\u003ch3 data-section-id=\"t4zfj9\" data-start=\"1235\" data-end=\"1260\"\u003e🌬️ Combustion system\u003c\/h3\u003e\\n\u003cul data-start=\"1261\" data-end=\"1342\"\u003e\\n\u003cli data-section-id=\"1e0tnag\" data-start=\"1261\" data-end=\"1300\"\u003eForced-draft design (blower-assisted)\u003c\/li\u003e\\n\u003cli data-section-id=\"8r5ya7\" data-start=\"1301\" data-end=\"1342\"\u003eStable heating even in windy conditions\u003c\/li\u003e\\n\u003c\/ul\u003e","brand":"Home Safes USA","offers":[{"title":"Default Title","offer_id":52725338079519,"sku":"ps117","price":1499.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0693\/2227\/7151\/files\/unnamed-31.jpg?v=1785472882","url":"https:\/\/homesafesusa.com\/products\/hayward-universal-h-series-pool-heater-h400fdn","provider":"Home Safes USA","version":"1.0","type":"link"}