{"product_id":"pentair-460805-mastertemp-natural-gas-pool-and-spa-heater-400k-btu","title":"PENTAIR MASTERTEMP 460805 LOW NOX NATURAL GAS POOL \u0026 SPA HEATER – 400K BTU, CUPRO-NICKEL HEAT EXCHANGER","description":"\u003cp\u003e\u003cstrong\u003eHeating Capacity:\u003c\/strong\u003e 400,000 BTU\u003cbr\u003e\u003cstrong\u003eThermal Efficiency:\u003c\/strong\u003e 82%\u003cbr\u003e\u003cstrong\u003eFuel Type:\u003c\/strong\u003e Natural Gas\u003cbr\u003e\u003cstrong\u003eHeat Exchanger:\u003c\/strong\u003e Cupro-Nickel (Heavy Duty)\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 136 lbs\u003cbr\u003e\u003cstrong\u003eEmissions:\u003c\/strong\u003e Certified Low NOx\u003cbr\u003e\u003cstrong\u003eDisplay:\u003c\/strong\u003e Rotating Digital\u003cbr\u003e\u003cstrong\u003eExterior:\u003c\/strong\u003e Rustproof\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003ePentair 460805 MasterTemp HD Natural Gas Pool \u0026amp; Spa Heater\u003c\/strong\u003e delivers \u003cstrong\u003e400,000 BTU\u003c\/strong\u003e with the \u003cstrong\u003eheavy-duty cupro-nickel heat exchanger\u003c\/strong\u003e rather than standard copper - the highest-output HD model Pentair builds.\u003c\/p\u003e\u003cp\u003eThat is the whole point of the HD designation. Copper heat exchangers corrode in salt-chlorinated water and under aggressive chemistry; cupro-nickel does not. If the pool runs a salt system, sits in a hard-water region, or sees chemistry that swings, the HD version is the one that survives.\u003c\/p\u003e\u003cp\u003eThe trade is a small efficiency cost - \u003cstrong\u003e82% thermal efficiency\u003c\/strong\u003e against 84% for the standard copper version - easily outweighed by not replacing an exchanger every few seasons. Everything else carries over: fast light-off, quiet operation, a \u003cstrong\u003erotating digital display\u003c\/strong\u003e that faces whichever way the unit is installed, and a built-in manual gas shutoff.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e400,000 BTU heating capacity\u003c\/li\u003e\n\u003cli\u003e82% thermal efficiency\u003c\/li\u003e\n\u003cli\u003eNatural Gas\u003c\/li\u003e\n\u003cli\u003eHeavy-duty cupro-nickel heat exchanger\u003c\/li\u003e\n\u003cli\u003eBuilt for salt-chlorinated and aggressive water chemistry\u003c\/li\u003e\n\u003cli\u003eHighest output HD MasterTemp\u003c\/li\u003e\n\u003cli\u003eCertified low NOx emissions\u003c\/li\u003e\n\u003cli\u003eRotating digital display for any installation orientation\u003c\/li\u003e\n\u003cli\u003eIndicator lights for at-a-glance operation monitoring\u003c\/li\u003e\n\u003cli\u003eBuilt-in manual gas shutoff for service\u003c\/li\u003e\n\u003cli\u003eCompact, quiet design\u003c\/li\u003e\n\u003cli\u003eRustproof exterior construction\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\u003ePentair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e460805\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eMasterTemp 400HD\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\u003e400,000 BTU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermal Efficiency\u003c\/td\u003e\n\u003ctd\u003e82%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat Exchanger\u003c\/td\u003e\n\u003ctd\u003eCupro-Nickel (Heavy Duty)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e136 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEmissions\u003c\/td\u003e\n\u003ctd\u003eCertified Low NOx\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003eRotating Digital\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGas Shutoff\u003c\/td\u003e\n\u003ctd\u003eManual, Built In\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExterior\u003c\/td\u003e\n\u003ctd\u003eRustproof\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\u003ePentair 460805 MasterTemp HD Natural Gas Pool \u0026amp; Spa Heater\u003c\/li\u003e\n\u003cli\u003eCupro-nickel heat exchanger assembly\u003c\/li\u003e\n\u003cli\u003eRotating digital display control\u003c\/li\u003e\n\u003cli\u003eInstallation and operation documentation\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThe \u003cstrong\u003ePentair 460805 MasterTemp HD\u003c\/strong\u003e is the 400,000 BTU MasterTemp built for salt pools - cupro-nickel exchanger, same controls, far longer life in hard water.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eLearn more at Pentair:\u003c\/strong\u003e\u003cbr\u003e\u003ca href=\"https:\/\/www.pentair.com\/en-us\/products\/residential\/pool-spa-equipment\/pool-heaters\/mastertemp_heater.html\"\u003ehttps:\/\/www.pentair.com\/en-us\/products\/residential\/pool-spa-equipment\/pool-heaters\/mastertemp_heater.html\u003c\/a\u003e\u003c\/p\u003e\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":48867135226105,"sku":"460805","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/1810\/9689\/files\/MasterTemp-banner_600x600_26d84e60-0d0d-48e2-b126-7dd89fd2f603.png?v=1787271638","url":"https:\/\/poolave.com\/es\/products\/pentair-460805-mastertemp-natural-gas-pool-and-spa-heater-400k-btu","provider":"PoolAve ","version":"1.0","type":"link"}