{"product_id":"hayward-h500fdnasme-universal-h-series-asme-low-nox-natural-gas-pool-and-spa-heater","title":"HAYWARD UNIVERSAL H-SERIES H500FDNASME ASME LOW NOX NATURAL GAS POOL \u0026 SPA HEATER – 500K BTU, BRONZE HEADERS, CUPRO-NICKEL HEAT EXCHANGER","description":"\u003cp\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e 24\" H x 40\" W x 29.5\" D\u003cbr\u003e\u003cstrong\u003eHeating Capacity:\u003c\/strong\u003e 500,000 BTU\u003cbr\u003e\u003cstrong\u003eFuel Type:\u003c\/strong\u003e Natural Gas\u003cbr\u003e\u003cstrong\u003eHeat Exchanger:\u003c\/strong\u003e Cupro-Nickel Finn Plate\u003cbr\u003e\u003cstrong\u003eHeader Material:\u003c\/strong\u003e Low-Lead Bronze\u003cbr\u003e\u003cstrong\u003eCertification:\u003c\/strong\u003e ASME\u003cbr\u003e\u003cstrong\u003eWater Flow Rate:\u003c\/strong\u003e 40-125 GPM\u003cbr\u003e\u003cstrong\u003eMaximum Pressure:\u003c\/strong\u003e 125 PSI\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eHayward H500FDNASME Universal H-Series ASME Low NOx Natural Gas Pool \u0026amp; Spa Heater\u003c\/strong\u003e delivers \u003cstrong\u003e500,000 BTU\u003c\/strong\u003e - the largest output Hayward builds in this platform, and the standard specification for commercial pools and any installation where code requires an ASME-certified vessel.\u003c\/p\u003e\u003cp\u003eASME certification is the practical difference. The unit ships with an \u003cstrong\u003eASME pressure relief valve\u003c\/strong\u003e as standard and is rated to \u003cstrong\u003e125 PSI\u003c\/strong\u003e. It pairs a patented \u003cstrong\u003eCupro-Nickel Finn Plate heat exchanger\u003c\/strong\u003e with a \u003cstrong\u003elow-lead bronze header\u003c\/strong\u003e using Hayward's patented bypass design - the combination specified for commercial duty cycles and aggressive water chemistry.\u003c\/p\u003e\u003cp\u003eAt 40 to 125 GPM the heater produces roughly a \u003cstrong\u003e21.9 F delta-T at minimum required flow\u003c\/strong\u003e. The 24-inch cabinet height is the lowest in the industry for this output, and a forced-draft combustion system removes the need for a high-wind stack.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e500,000 BTU heating capacity\u003c\/li\u003e\n\u003cli\u003eNatural Gas\u003c\/li\u003e\n\u003cli\u003eASME certified with pressure relief valve standard\u003c\/li\u003e\n\u003cli\u003eRated to 125 PSI maximum pressure\u003c\/li\u003e\n\u003cli\u003ePatented Cupro-Nickel Finn Plate heat exchanger with totally managed flow\u003c\/li\u003e\n\u003cli\u003eLow-lead bronze header with patented bypass design\u003c\/li\u003e\n\u003cli\u003e40-125 GPM water flow rate\u003c\/li\u003e\n\u003cli\u003eApproximately 21.9 F delta-T at minimum flow\u003c\/li\u003e\n\u003cli\u003e24\" cabinet height - lowest in the industry\u003c\/li\u003e\n\u003cli\u003eLow NOx design\u003c\/li\u003e\n\u003cli\u003eForced-draft combustion system\u003c\/li\u003e\n\u003cli\u003e2\" x 2-1\/2\" CPVC flanged plumbing connections\u003c\/li\u003e\n\u003cli\u003e3-year parts and labor warranty\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpecification\u003c\/td\u003e\n\u003ctd\u003eDetails\u003c\/td\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\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eH500FDNASME\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eUniversal H-Series ASME\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\u003eBTU Input\u003c\/td\u003e\n\u003ctd\u003e500,000 BTU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat Exchanger\u003c\/td\u003e\n\u003ctd\u003eCupro-Nickel Finn Plate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeader Material\u003c\/td\u003e\n\u003ctd\u003eLow-Lead Bronze\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eASME\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Pressure\u003c\/td\u003e\n\u003ctd\u003e125 PSI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater Flow Rate\u003c\/td\u003e\n\u003ctd\u003e40-125 GPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDelta-T\u003c\/td\u003e\n\u003ctd\u003eApprox. 21.9 F at Minimum Flow\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 Flanged\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGas Connection\u003c\/td\u003e\n\u003ctd\u003e3\/4\" NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e24\" H x 40\" W x 29.5\" D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnit Weight\u003c\/td\u003e\n\u003ctd\u003e260 lbs\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 Phase\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 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Breaker Size\u003c\/td\u003e\n\u003ctd\u003e15 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEmissions\u003c\/td\u003e\n\u003ctd\u003eLow NOx\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClearances\u003c\/td\u003e\n\u003ctd\u003e12\" Sides \/ 6\" Rear\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e3-Year Parts \u0026amp; Labor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eWhat's Included\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eHayward H500FDNASME Universal H-Series ASME Low NOx Natural Gas Pool \u0026amp; Spa Heater\u003c\/li\u003e\n\u003cli\u003eCupro-Nickel Finn Plate heat exchanger with low-lead bronze header\u003c\/li\u003e\n\u003cli\u003eASME pressure relief valve\u003c\/li\u003e\n\u003cli\u003e2\" x 2-1\/2\" CPVC flanged plumbing connections\u003c\/li\u003e\n\u003cli\u003eInstallation and operation documentation\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThe \u003cstrong\u003eHayward H500FDNASME\u003c\/strong\u003e delivers 500,000 BTU of ASME-certified natural gas heating with a cupro-nickel exchanger and bronze header - built for commercial pools and code-driven installations.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eLearn more at Hayward:\u003c\/strong\u003e\u003cbr\u003e\u003ca href=\"https:\/\/hayward.com\/universal-h-series-asme-500-000-btu-natural-gas-low-nox-h500fdnasme.html\"\u003ehttps:\/\/hayward.com\/universal-h-series-asme-500-000-btu-natural-gas-low-nox-h500fdnasme.html\u003c\/a\u003e\u003c\/p\u003e\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":48867141878009,"sku":"H500FDNASME","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/1810\/9689\/files\/IMG_1582_clipped_02_Commercial_Heater_copy_292d_600x600_20770d9a-37be-44d8-bd4b-935195047e25.jpg?v=1787271736","url":"https:\/\/poolave.com\/products\/hayward-h500fdnasme-universal-h-series-asme-low-nox-natural-gas-pool-and-spa-heater","provider":"PoolAve ","version":"1.0","type":"link"}