{"product_id":"pentair-461021-hd-asme-heater","title":"Pentair MasterTemp HD ASME Pool Heater 461021 – 400K BTU Natural Gas, High-Performance \u0026 Energy Efficient","description":"\u003cp data-start=\"649\" data-end=\"1053\"\u003eThe \u003cstrong data-start=\"653\" data-end=\"702\"\u003ePentair MasterTemp HD ASME Pool Heater 461021\u003c\/strong\u003e delivers \u003cstrong data-start=\"712\" data-end=\"757\"\u003e400,000 BTU of powerful, reliable heating\u003c\/strong\u003e with built-in ASME certification for high-performance applications. Designed to meet rigorous commercial and residential standards, this natural gas heater blends robust construction, efficient heat transfer, and advanced control features to extend your swimming season with consistent warmth.\u003c\/p\u003e\n\u003cp data-start=\"1055\" data-end=\"1449\"\u003eFeaturing a \u003cstrong data-start=\"1067\" data-end=\"1101\"\u003ehigh‑efficiency heat exchanger\u003c\/strong\u003e, electronic ignition, and intuitive digital controls, the MasterTemp HD ASME model provides fast warm‑up times, optimized fuel use, and dependable operation even under demanding conditions. Its ASME‑rated design ensures enhanced safety and durability, making it ideal for larger pools, heavy use, or installations requiring certified compliance.\u003c\/p\u003e\n\u003ch2 data-start=\"1456\" data-end=\"1478\"\u003e\u003cstrong data-start=\"1459\" data-end=\"1476\"\u003e\u003cstrong data-start=\"653\" data-end=\"702\"\u003ePentair MasterTemp HD ASME Pool Heater 461021 \u003c\/strong\u003eCompatibility\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul data-start=\"1479\" data-end=\"1880\"\u003e\n\u003cli data-start=\"1479\" data-end=\"1533\"\u003e\n\u003cp data-start=\"1481\" data-end=\"1533\"\u003eDesigned for \u003cstrong data-start=\"1494\" data-end=\"1530\"\u003enatural gas pool heating systems\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1534\" data-end=\"1619\"\u003e\n\u003cp data-start=\"1536\" data-end=\"1619\"\u003eFits \u003cstrong data-start=\"1541\" data-end=\"1568\"\u003e2” plumbing connections\u003c\/strong\u003e common in both residential and commercial pools.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1620\" data-end=\"1727\"\u003e\n\u003cp data-start=\"1622\" data-end=\"1727\"\u003eCompatible with \u003cstrong data-start=\"1638\" data-end=\"1668\"\u003ePentair automation systems\u003c\/strong\u003e including IntelliCenter®, EasyTouch®, and IntelliTouch®.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1728\" data-end=\"1806\"\u003e\n\u003cp data-start=\"1730\" data-end=\"1806\"\u003eIdeal as a replacement for older ASME‑rated or high‑capacity pool heaters.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1807\" data-end=\"1880\"\u003e\n\u003cp data-start=\"1809\" data-end=\"1880\"\u003eWorks with standard pool circulation and variable‑speed pump systems.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":51030360064317,"sku":"461021","price":5086.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0968\/6741\/8429\/files\/461020_8bf95e1e-10cc-4141-a06d-c224dac22b41.png?v=1763858862","url":"https:\/\/poolsupply4u.com\/products\/pentair-461021-hd-asme-heater","provider":"PoolSupply 4U","version":"1.0","type":"link"}