{"product_id":"pentair-max-e-therm®-400-natural-gas-pool-spa-heater-400k-btu","title":"Pentair Max-E-Therm® 400 Natural Gas Pool \u0026 Spa Heater 400K BTU","description":"\u003cp\u003eThe Pentair Max-E-Therm® 400,000 BTU Natural Gas Heater is an industry-leading, high-output heating system engineered to provide the fastest possible heat-up times for large residential and commercial pools and spas. This powerhouse features a high-efficiency pre-mixed combustion system that optimizes fuel use while maintaining a \"Low NOx\" certification for environmentally friendly operation. Designed with a distinctively sleek, matte-black enclosure made of Dura-Glas™—a high-grade, rust-proof composite resin—the Max-E-Therm is built to survive the harshest outdoor elements and corrosive pool environments. Its internal components include a heavy-duty cupro-nickel heat exchanger that provides superior resistance to fluctuations in water chemistry, ensuring a long operational life. The unit is equipped with an intuitive digital control panel that offers precise temperature management and dual thermostats for pool and spa combinations, along with advanced self-diagnostic features for easy maintenance. Despite its compact, lightweight design compared to traditional heavy-metal heaters, the substantial internal firebox and industrial-grade plumbing give it a solid, professional-grade build. The Pentair Max-E-Therm 400K BTU Natural Gas Heater weighs approximately \u003cb data-path-to-node=\"1\" data-index-in-node=\"1278\"\u003e138 pounds\u003c\/b\u003e, serving as an ultra-efficient, durable, and rapid heating solution for high-demand aquatic environments.\u003c\/p\u003e","brand":"Commercial Pool and Spa Supplies","offers":[{"title":"Default Title","offer_id":53093295554671,"sku":"SR400NA","price":7521.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/3785\/3807\/files\/max_e_therm_5efde6a5-9385-43a6-8b3b-0f034a3bbfbf.avif?v=1778768995","url":"https:\/\/commercialpoolandspasupplies.com\/products\/pentair-max-e-therm%c2%ae-400-natural-gas-pool-spa-heater-400k-btu","provider":"Commercial Pool and Spa Supplies ","version":"1.0","type":"link"}