{"product_id":"461021-pentair-mastertemp-asme-hd-certified-400k-natural-gas-pool-heater","title":"461021 | Pentair MasterTemp ASME HD certified 400k Natural Gas Pool Heater","description":"\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0698\/1943\/3260\/files\/desktop_461021.jpg?v=1772842811\"\u003e\u003c\/p\u003e\n\u003c!-- ✅ Advanced Heating Performance – Premium Split Hero Format --\u003e\n\u003cstyle\u003e\n  .heat-hero-wrap{\n    font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;\n    margin:70px 0;\n  }\n\n  .heat-hero-section{\n    background:#edf4f8;\n    border-radius:30px;\n    padding:70px 55px;\n  }\n\n  .heat-hero-grid{\n    display:grid;\n    grid-template-columns:1.05fr .95fr;\n    gap:70px;\n    align-items:center;\n  }\n\n  .heat-hero-text{\n    max-width:700px;\n  }\n\n  .heat-hero-pill{\n    display:inline-block;\n    padding:10px 18px;\n    border:1px solid #c9dceb;\n    border-radius:999px;\n    color:#0b4d86;\n    font-size:13px;\n    font-weight:800;\n    letter-spacing:1.4px;\n    text-transform:uppercase;\n    margin-bottom:24px;\n    background:rgba(255,255,255,.45);\n  }\n\n  .heat-hero-title{\n    margin:0 0 26px;\n    font-family:Georgia,\"Times New Roman\",serif;\n    font-size:68px;\n    line-height:1.02;\n    font-weight:700;\n    color:#0d2238;\n    letter-spacing:-1.3px;\n  }\n\n  .heat-hero-title .blue{\n    color:#1673c9;\n    font-style:italic;\n    font-weight:500;\n  }\n\n  .heat-hero-desc{\n    margin:0 0 34px;\n    font-size:18px;\n    line-height:1.85;\n    color:#45627d;\n    max-width:660px;\n  }\n\n  .heat-hero-divider{\n    height:1px;\n    background:#d5e4ef;\n    margin:0 0 28px;\n    max-width:760px;\n  }\n\n  .heat-hero-stats{\n    display:grid;\n    grid-template-columns:repeat(3,1fr);\n    gap:26px;\n    max-width:760px;\n    margin-bottom:34px;\n  }\n\n  .heat-hero-stat{\n    min-width:0;\n  }\n\n  .heat-hero-number{\n    font-family:Georgia,\"Times New 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max-width:760px;\n    display:block;\n    margin:0 auto;\n    border-radius:28px;\n    box-shadow:0 22px 60px rgba(0,0,0,.16);\n  }\n\n  .heat-hero-badge{\n    position:absolute;\n    left:-26px;\n    bottom:-26px;\n    background:#082541;\n    color:#ffffff;\n    border-radius:22px;\n    padding:18px 22px;\n    min-width:175px;\n    box-shadow:0 18px 36px rgba(0,0,0,.18);\n  }\n\n  .heat-hero-badge small{\n    display:block;\n    font-size:14px;\n    font-weight:700;\n    color:#dbe8f3;\n    margin-bottom:8px;\n  }\n\n  .heat-hero-badge strong{\n    display:block;\n    font-family:Georgia,\"Times New Roman\",serif;\n    font-size:26px;\n    line-height:1.05;\n    font-weight:700;\n    color:#ffffff;\n  }\n\n  @media (max-width: 1200px){\n    .heat-hero-title{\n      font-size:58px;\n    }\n    .heat-hero-grid{\n      gap:45px;\n    }\n  }\n\n  @media (max-width: 920px){\n    .heat-hero-section{\n      padding:45px 24px 60px;\n    }\n\n    .heat-hero-grid{\n      grid-template-columns:1fr;\n      gap:38px;\n    }\n\n    .heat-hero-title{\n      font-size:44px;\n    }\n\n    .heat-hero-desc{\n      font-size:16px;\n    }\n\n    .heat-hero-stats{\n      grid-template-columns:1fr;\n      gap:18px;\n    }\n\n    .heat-hero-badge{\n      left:14px;\n      bottom:-18px;\n    }\n  }\n\n  @media (max-width: 480px){\n    .heat-hero-title{\n      font-size:36px;\n    }\n\n    .heat-hero-number{\n      font-size:34px;\n    }\n\n    .heat-hero-badge{\n      position:static;\n      margin-top:18px;\n      width:max-content;\n      max-width:100%;\n    }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"heat-hero-wrap\"\u003e\n\u003cdiv class=\"heat-hero-section\"\u003e\n\u003cdiv class=\"heat-hero-grid\"\u003e\n\u003cdiv class=\"heat-hero-text\"\u003e\n\u003cdiv class=\"heat-hero-pill\"\u003eMasterTemp ASME HD\u003c\/div\u003e\n\u003ch2 class=\"heat-hero-title\"\u003eAdvanced heating \u003cspan class=\"blue\"\u003eperformance\u003c\/span\u003e for demanding applications.\u003c\/h2\u003e\n\u003cp class=\"heat-hero-desc\"\u003eDesigned for commercial pool and spa installations, this heater combines high BTU output, efficient combustion, and quiet operation to deliver strong, reliable heat with refined day-to-day performance.\u003c\/p\u003e\n\u003cdiv class=\"heat-hero-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"heat-hero-stats\"\u003e\n\u003cdiv class=\"heat-hero-stat\"\u003e\n\u003cdiv class=\"heat-hero-number\"\u003e400,000 \u003csmall\u003eBTU\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"heat-hero-label\"\u003eHeating capacity\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"heat-hero-stat\"\u003e\n\u003cdiv class=\"heat-hero-number\"\u003e84\u003csmall\u003e%\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"heat-hero-label\"\u003eCombustion efficiency\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"heat-hero-stat\"\u003e\n\u003cdiv class=\"heat-hero-number\"\u003e1 \u003csmall\u003equiet\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"heat-hero-label\"\u003eLow-noise operation\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"heat-hero-tags\"\u003e\n\u003cdiv class=\"heat-hero-tag\"\u003e400,000 BTU Heating Capacity\u003c\/div\u003e\n\u003cdiv class=\"heat-hero-tag\"\u003eHigh-Efficiency Combustion\u003c\/div\u003e\n\u003cdiv class=\"heat-hero-tag\"\u003eQuiet Operation\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"heat-hero-image\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0698\/1943\/3260\/files\/MasterTemp_ASME_HD_461021.jpg?v=1772843104\" alt=\"MasterTemp ASME HD heater\"\u003e\n\u003cdiv class=\"heat-hero-badge\"\u003e\n\u003csmall\u003eCommercial Heating\u003c\/small\u003e \u003cstrong\u003ePowerful output\u003cbr\u003ewith efficient operation\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Advanced Heating Performance --\u003e\n\u003cstyle\u003e\n.heat-wrap{\nfont-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;\nmargin:70px 0;\n}\n\n.heat-section{\nbackground:#eef3f7;\nborder-radius:28px;\npadding:65px 55px;\n}\n\n.heat-grid{\ndisplay:grid;\ngrid-template-columns:1fr 1fr;\ngap:60px;\nalign-items:center;\nmax-width:1200px;\nmargin:auto;\n}\n\n.heat-img img{\nwidth:100%;\nmax-width:560px;\ndisplay:block;\nmargin:0 auto;\nborder-radius:22px;\nbox-shadow:0 18px 45px rgba(0,0,0,.14);\n}\n\n.heat-title{\nfont-size:42px;\nfont-weight:900;\nline-height:1.1;\ncolor:#0b3a86;\nmargin:0 0 30px;\nletter-spacing:.3px;\n}\n\n.heat-list{\ndisplay:grid;\ngap:22px;\n}\n\n.heat-card{\nbackground:#ffffff;\nborder-radius:18px;\npadding:24px 26px;\nbox-shadow:0 10px 28px rgba(0,0,0,.08);\n}\n\n.heat-card h3{\nfont-size:18px;\nfont-weight:900;\ncolor:#0b3a86;\nmargin-bottom:8px;\nletter-spacing:.3px;\n}\n\n.heat-card p{\nfont-size:16px;\nline-height:1.7;\ncolor:#4b5563;\nmargin:0;\n}\n\n@media (max-width:900px){\n.heat-grid{\ngrid-template-columns:1fr;\ngap:40px;\n}\n\n.heat-title{\nfont-size:34px;\ntext-align:center;\n}\n}\n\u003c\/style\u003e\n\u003cdiv class=\"heat-wrap\"\u003e\n\u003cdiv class=\"heat-section\"\u003e\n\u003cdiv class=\"heat-grid\"\u003e\n\u003cdiv class=\"heat-img\"\u003e\n\u003cimg\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0698\/1943\/3260\/files\/MasterTemp_ASME_HD_461021_1.jpg?v=1772900250\"\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"heat-content\"\u003e\n\u003ch2 class=\"heat-title\"\u003eAdvanced Heating Performance\u003c\/h2\u003e\n\u003cdiv class=\"heat-list\"\u003e\n\u003cdiv class=\"heat-card\"\u003e\n\u003ch3\u003e400,000 BTU Heating Capacity\u003c\/h3\u003e\n\u003cp\u003eDelivers powerful heating output suitable for commercial pool and spa installations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"heat-card\"\u003e\n\u003ch3\u003eHigh-Efficiency Combustion\u003c\/h3\u003e\n\u003cp\u003eFully premixed air-and-gas combustion system provides faster heating while maintaining efficiency levels up to 84%.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"heat-card\"\u003e\n\u003ch3\u003eQuiet Operation\u003c\/h3\u003e\n\u003cp\u003eEngineered for low operational noise while maintaining strong heating performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Intelligent Control System --\u003e\n\u003cstyle\u003e\n.control-wrap{\nfont-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;\nmargin:70px 0;\n}\n\n.control-section{\nbackground:#eef3f7;\nborder-radius:26px;\npadding:65px 55px;\n}\n\n.control-title{\ntext-align:center;\nfont-size:40px;\nfont-weight:900;\ncolor:#0b3a86;\nmargin-bottom:40px;\nletter-spacing:.4px;\n}\n\n.control-grid{\ndisplay:grid;\ngrid-template-columns:repeat(3,1fr);\ngap:30px;\nmax-width:1100px;\nmargin:auto;\n}\n\n.control-card{\nbackground:#ffffff;\nborder-radius:18px;\npadding:30px 28px;\nbox-shadow:0 10px 28px rgba(0,0,0,.08);\n}\n\n.control-card h3{\nfont-size:18px;\nfont-weight:900;\ncolor:#0b3a86;\nmargin-bottom:10px;\nletter-spacing:.3px;\n}\n\n.control-card p{\nfont-size:16px;\nline-height:1.7;\ncolor:#4b5563;\nmargin:0;\n}\n\n@media (max-width:900px){\n.control-grid{\ngrid-template-columns:1fr;\n}\n}\n\u003c\/style\u003e\n\u003cdiv class=\"control-wrap\"\u003e\n\u003cdiv class=\"control-section\"\u003e\n\u003ch2 class=\"control-title\"\u003eIntelligent Control System\u003c\/h2\u003e\n\u003cdiv class=\"control-grid\"\u003e\n\u003cdiv class=\"control-card\"\u003e\n\u003ch3\u003eDigital Display Interface\u003c\/h3\u003e\n\u003cp\u003eFull text digital display provides an intuitive menu for heater operation, diagnostics, and system monitoring.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"control-card\"\u003e\n\u003ch3\u003eFlame Strength Monitoring\u003c\/h3\u003e\n\u003cp\u003eIntegrated ignition control module monitors flame strength to ensure optimal heater performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"control-card\"\u003e\n\u003ch3\u003eAutomated Alerts\u003c\/h3\u003e\n\u003cp\u003eSystem alerts notify users when the heater requires maintenance or service attention.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 data-end=\"2324\" data-start=\"2297\" data-section-id=\"1cncjfo\"\u003e\u003cstrong\u003eInstallation Flexibility\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch3 data-end=\"2360\" data-start=\"2326\" data-section-id=\"siiphc\"\u003e\u003cstrong\u003eIndoor Installation Approved\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-end=\"2440\" data-start=\"2361\"\u003eCertified for indoor installations when used with a Direct Air Intake Duct Kit.\u003c\/p\u003e\n\u003ch3 data-end=\"2470\" data-start=\"2442\" data-section-id=\"1u6747\"\u003e\u003cstrong\u003eHeat Exchanger Options\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-end=\"2575\" data-start=\"2471\"\u003eAvailable with copper or heavy-duty cupronickel heat exchanger models to match application requirements.\u003c\/p\u003e\n\u003cp data-end=\"2575\" data-start=\"2471\"\u003e \u003c\/p\u003e\n\u003ch2 data-end=\"164\" data-start=\"107\" data-section-id=\"15zezx\"\u003e\u003cstrong\u003eMasterTemp High Performance ASME Certified Pool Heater\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp data-end=\"547\" data-start=\"166\"\u003eThe MasterTemp High Performance ASME Certified Heater delivers ultra-high heating performance in a compact, quiet, and energy-efficient design built for commercial pool and spa applications. Designed to meet ASME certification requirements, this 400,000 BTU heater combines durable construction with advanced heating technology to provide fast heat-up times and reliable operation.\u003c\/p\u003e\n\u003cp data-end=\"837\" data-start=\"549\"\u003eIts high-efficiency combustion system and optimized air-to-gas mixture allow for rapid water heating while maintaining energy efficiency of up to 84%. The compact footprint allows installation in tight equipment areas while maintaining strong heating capacity for larger commercial pools.\u003c\/p\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":51313326948640,"sku":"461021","price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0922\/3326\/9536\/files\/MasterTempASMEHD461021.jpg?v=1777144358","url":"https:\/\/discountpoolmart.com\/products\/461021-pentair-mastertemp-asme-hd-certified-400k-natural-gas-pool-heater","provider":"Discount Pool Mart","version":"1.0","type":"link"}