{"product_id":"pentair-mastertemp-asme-hd-400-heater-natural-gas-400k-btu-461021","title":"Pentair MasterTemp ASME HD 400 Natural Gas Pool Heater, 400K BTU | 461021","description":"\u003cp\u003eThe Pentair MasterTemp ASME HD 400 (part number 461021) is a heavy-duty 400,000 BTU natural gas heater for commercial pools, aquatic facilities and premium residential installations. It combines an ASME-certified copper-nickel heat exchanger with a fully enclosed, weather-resistant cabinet for long service in high-use environments.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e400,000 BTU:\u003c\/strong\u003e Fast heating and recovery for large pools and spas.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eASME-certified heavy-duty build:\u003c\/strong\u003e Meets commercial code requirements for safety and construction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCopper-nickel heat exchanger:\u003c\/strong\u003e Greater corrosion resistance than standard copper in harsh or high-use water.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHot-surface ignition:\u003c\/strong\u003e Reliable startup without a standing pilot.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDigital controls:\u003c\/strong\u003e Clear readouts and easy adjustments for operators and technicians.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow NOx design:\u003c\/strong\u003e Complies with emissions standards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuiet operation:\u003c\/strong\u003e Engineered to minimize noise at high output.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003ePentair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003ctd\u003e461021\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct Line\u003c\/th\u003e\n\u003ctd\u003eMasterTemp ASME HD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBTU\u003c\/th\u003e\n\u003ctd\u003e400,000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFuel Type\u003c\/th\u003e\n\u003ctd\u003eNatural Gas\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCertification\u003c\/th\u003e\n\u003ctd\u003eASME\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeat Exchanger\u003c\/th\u003e\n\u003ctd\u003eCopper-nickel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eBefore You Order\u003c\/h3\u003e\n\u003cp\u003eThis model runs on natural gas only; propane versions use different part numbers. Confirm your facility code requirements, venting, clearances and gas line sizing, and have a licensed professional install it. Questions? Call \u003ca href=\"tel:+18556777796\"\u003e855-677-7796\u003c\/a\u003e or \u003ca href=\"\/pages\/contact\"\u003econtact us\u003c\/a\u003e with your model and part number.\u003c\/p\u003e\n\u003csection data-psw-shipping-box-dimensions=\"true\"\u003e\u003ch2\u003eShipping Box Dimensions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e36 x 25 x 30 in\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions refer to the shipping carton.\u003c\/p\u003e\u003c\/section\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":49867660886262,"sku":"461021","price":4750.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0788\/0448\/4342\/files\/mastertempasme_1.jpg?v=1768505242","url":"https:\/\/poolsupplywholesale.com\/products\/pentair-mastertemp-asme-hd-400-heater-natural-gas-400k-btu-461021","provider":"Pool Supply Wholesale","version":"1.0","type":"link"}