{"product_id":"pentair-mastertemp-400-high-performance-pool-spa-heater-400-000-btus-natural-gas-ec-462028","title":"Pentair | EC-462028 | MasterTemp 400 High Performance Pool \u0026 Spa Heater | 400,000 BTU Natural Gas","description":"\u003c!--split--\u003e\n\u003cp data-start=\"138\" data-end=\"596\"\u003eThe Pentair EC-462028 MasterTemp 400 High Performance Heater is a 400,000 BTU natural gas pool and spa heater engineered for fast heat-up and high-efficiency operation. Designed with induced-draft combustion and hot surface ignition, this unit delivers consistent performance while maintaining low NOx emissions. Its compact footprint and corrosion-resistant enclosure support flexible outdoor installation for residential and commercial pool environments.\u003c\/p\u003e\n\u003cp data-start=\"598\" data-end=\"640\"\u003e────────────────────────────────────────\u003c\/p\u003e\n\u003cp data-start=\"642\" data-end=\"656\"\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"658\" data-end=\"1321\"\u003e• 400,000 BTU natural gas heater for pools and spas requiring high-capacity heating.\u003cbr data-start=\"742\" data-end=\"745\"\u003e• Induced-draft combustion system with hot surface ignition for reliable startup.\u003cbr data-start=\"826\" data-end=\"829\"\u003e• Digital control interface with full-text display for temperature monitoring and diagnostics.\u003cbr data-start=\"923\" data-end=\"926\"\u003e• 120\/240 VAC electrical configuration, single phase operation.\u003cbr data-start=\"989\" data-end=\"992\"\u003e• Integrated safety controls including high limits, air flow switch, and stack flue sensor.\u003cbr data-start=\"1083\" data-end=\"1086\"\u003e• Compatible with Pentair automation systems for remote monitoring and control.\u003cbr data-start=\"1165\" data-end=\"1168\"\u003e• Corrosion-resistant composite enclosure designed for outdoor durability.\u003cbr data-start=\"1242\" data-end=\"1245\"\u003e• Available in standard and ASME configurations under model 460736 series.\u003c\/p\u003e\n\u003cp data-start=\"1323\" data-end=\"1365\"\u003e────────────────────────────────────────\u003c\/p\u003e\n\u003cp data-start=\"1367\" data-end=\"1385\"\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1387\" data-end=\"1821\"\u003eThe Pentair EC-462028 MasterTemp 400 is engineered to provide powerful and efficient heating for residential and light commercial pool and spa systems. With a 400,000 BTU input rating, this heater delivers rapid temperature recovery and dependable performance during extended operation. The induced-draft combustion design ensures optimal fuel-to-air mixture, while the hot surface ignition eliminates the need for a standing pilot.\u003c\/p\u003e\n\u003cp data-start=\"1823\" data-end=\"2429\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eThe heater features a digital operating control panel that displays current water temperature, set points, and diagnostic codes for simplified system management. Designed for compatibility with Pentair IntelliCenter and other automation platforms, it supports integrated pool control and remote monitoring. Its compact cabinet and corrosion-resistant materials allow installation in outdoor environments with proper clearances. When properly installed according to gas and electrical codes, the MasterTemp 400 delivers consistent, high-capacity heating performance for demanding pool and spa applications.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp data-start=\"0\" data-end=\"40\"\u003e────────────────────────────────────────\u003c\/p\u003e\n\u003ch2 data-section-id=\"w1c0q0\" data-start=\"42\" data-end=\"77\"\u003eFrequently Asked Questions (FAQ)\u003c\/h2\u003e\n\u003cp data-start=\"79\" data-end=\"329\"\u003e\u003cstrong data-start=\"79\" data-end=\"147\"\u003eQ: What is the Pentair EC-462028 MasterTemp 400 heater used for?\u003c\/strong\u003e\u003cbr data-start=\"147\" data-end=\"150\"\u003eA: The Pentair EC-462028 MasterTemp 400 is a 400,000 BTU natural gas pool and spa heater designed for fast, high-capacity heating in residential and light commercial applications.\u003c\/p\u003e\n\u003chr data-start=\"331\" data-end=\"334\"\u003e\n\u003cp data-start=\"336\" data-end=\"505\"\u003e\u003cstrong data-start=\"336\" data-end=\"391\"\u003eQ: Is the Pentair EC-462028 natural gas or propane?\u003c\/strong\u003e\u003cbr data-start=\"391\" data-end=\"394\"\u003eA: This model is designed for natural gas. Propane versions are available under different Pentair part numbers.\u003c\/p\u003e\n\u003chr data-start=\"507\" data-end=\"510\"\u003e\n\u003cp data-start=\"512\" data-end=\"720\"\u003e\u003cstrong data-start=\"512\" data-end=\"568\"\u003eQ: What size pool is the Pentair EC-462028 best for?\u003c\/strong\u003e\u003cbr data-start=\"568\" data-end=\"571\"\u003eA: This 400K BTU heater is best for large pools, attached spas, and pool\/spa combinations that need rapid heat-up and consistent temperature control.\u003c\/p\u003e\n\u003chr data-start=\"722\" data-end=\"725\"\u003e\n\u003cp data-start=\"727\" data-end=\"950\"\u003e\u003cstrong data-start=\"727\" data-end=\"783\"\u003eQ: Is the Pentair EC-462028 MasterTemp 400 worth it?\u003c\/strong\u003e\u003cbr data-start=\"783\" data-end=\"786\"\u003eA: Yes. It is a strong option for pool owners who need high-output natural gas heating, compact installation, digital controls, and reliable MasterTemp performance.\u003c\/p\u003e\n\u003chr data-start=\"952\" data-end=\"955\"\u003e\n\u003cp data-start=\"957\" data-end=\"1138\"\u003e\u003cstrong data-start=\"957\" data-end=\"1012\"\u003eQ: Does the Pentair EC-462028 use a standing pilot?\u003c\/strong\u003e\u003cbr data-start=\"1012\" data-end=\"1015\"\u003eA: No. This heater uses hot surface ignition, which eliminates the need for a standing pilot and supports reliable startup.\u003c\/p\u003e\n\u003chr data-start=\"1140\" data-end=\"1143\"\u003e\n\u003cp data-start=\"1145\" data-end=\"1283\"\u003e\u003cstrong data-start=\"1145\" data-end=\"1200\"\u003eQ: What voltage does the Pentair EC-462028 require?\u003c\/strong\u003e\u003cbr data-start=\"1200\" data-end=\"1203\"\u003eA: This heater is compatible with 120V or 240V, single-phase electrical service.\u003c\/p\u003e\n\u003chr data-start=\"1285\" data-end=\"1288\"\u003e\n\u003cp data-start=\"1290\" data-end=\"1536\"\u003e\u003cstrong data-start=\"1290\" data-end=\"1355\"\u003eQ: Can the Pentair EC-462028 replace my existing pool heater?\u003c\/strong\u003e\u003cbr data-start=\"1355\" data-end=\"1358\"\u003eA: Yes. It can replace many existing natural gas pool heaters, but compatibility depends on gas supply, plumbing layout, electrical setup, venting, and installation requirements.\u003c\/p\u003e\n\u003chr data-start=\"1538\" data-end=\"1541\"\u003e\n\u003cp data-start=\"1543\" data-end=\"1756\"\u003e\u003cstrong data-start=\"1543\" data-end=\"1611\"\u003eQ: Does the Pentair EC-462028 require professional installation?\u003c\/strong\u003e\u003cbr data-start=\"1611\" data-end=\"1614\"\u003eA: Yes. Professional installation is recommended due to natural gas sizing, electrical wiring, plumbing, venting, and local code requirements.\u003c\/p\u003e\n\u003chr data-start=\"1758\" data-end=\"1761\"\u003e\n\u003cp data-start=\"1763\" data-end=\"1980\"\u003e\u003cstrong data-start=\"1763\" data-end=\"1836\"\u003eQ: Can the Pentair EC-462028 be used with Pentair automation systems?\u003c\/strong\u003e\u003cbr data-start=\"1836\" data-end=\"1839\"\u003eA: Yes. This heater is compatible with Pentair automation systems for centralized pool control, temperature management, and remote operation.\u003c\/p\u003e\n\u003chr data-start=\"1982\" data-end=\"1985\"\u003e\n\u003cp data-start=\"1987\" data-end=\"2196\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\u003cstrong data-start=\"1987\" data-end=\"2065\"\u003eQ: When should I choose the Pentair EC-462028 instead of a smaller heater?\u003c\/strong\u003e\u003cbr data-start=\"2065\" data-end=\"2068\"\u003eA: Choose this 400K BTU model if you have a large pool, attached spa, or need faster heat-up than lower BTU natural gas heaters.\u003c\/p\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":48988601680184,"sku":"EC-462028","price":4299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0808\/6319\/9544\/files\/PENEC462028_4_f5ff65e1-fcdf-4abd-806f-3baf577593c8.png?v=1777756272","url":"https:\/\/appaetechpoolsupply.com\/products\/pentair-mastertemp-400-high-performance-pool-spa-heater-400-000-btus-natural-gas-ec-462028","provider":"AppaeTech Pool Supply","version":"1.0","type":"link"}