{"product_id":"pentair-max-e-therm®-333-natural-gas-pool-spa-heater-333k-btu","title":"Pentair Max-E-Therm® 333 Natural Gas Pool \u0026 Spa Heater 333K BTU","description":"\u003cp\u003eThe Pentair Max-E-Therm® 333,000 BTU Natural Gas Heater is a high-efficiency heating system designed to provide rapid temperature elevation for mid-to-large sized residential pools and spas. This model utilizes a sophisticated pre-mixed combustion system that optimizes fuel consumption and heating speed, allowing for a \"Low NOx\" certification that meets stringent air quality standards. Its distinctive, compact housing is manufactured from Dura-Glas™—a high-density, rust-proof composite resin—which ensures the unit remains impervious to the corrosive effects of salt air, pool chemicals, and harsh weather conditions. The internal design features a heavy-duty cupro-nickel heat exchanger, providing enhanced durability and resistance to fluctuating water chemistry for a longer operational life. A user-friendly digital control panel offers precise temperature management with dual thermostats for pool and spa settings, while self-diagnostic indicators simplify routine maintenance. Despite its streamlined profile, the unit contains a substantial internal firebox and professional-grade plumbing components that provide a solid, industrial build. The Pentair Max-E-Therm 333K BTU Natural Gas Heater weighs approximately \u003cb data-path-to-node=\"1\" data-index-in-node=\"1227\"\u003e138 pounds\u003c\/b\u003e, standing as an ultra-reliable, quiet, and powerful heating solution for modern aquatic environments.\u003c\/p\u003e","brand":"Commercial Pool and Spa Supplies","offers":[{"title":"Default Title","offer_id":53093317804143,"sku":"SR333NA","price":7215.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/3785\/3807\/files\/max_e_therm_dde803d8-7dad-40b1-86d5-a41cb61302ce.avif?v=1778769362","url":"https:\/\/commercialpoolandspasupplies.com\/products\/pentair-max-e-therm%c2%ae-333-natural-gas-pool-spa-heater-333k-btu","provider":"Commercial Pool and Spa Supplies ","version":"1.0","type":"link"}