{"product_id":"pentair-eti-400-high-efficiency-natural-gas-heater-400k-btu-461113","title":"Pentair ETi 400 High-Efficiency Natural Gas Heater, 400K BTU | 461113","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eThe Pentair ETi 400 High-Efficiency Natural Gas Heater is a premium 400,000 BTU pool and spa heater built for fast heat-up times, energy savings, and long-lasting performance. Designed with Pentair’s Titan-Tough™ Direct-Fire Titanium Heat Exchanger, the ETi 400 delivers exceptional corrosion resistance and dependable heating power for demanding residential and commercial pool applications.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWith 96% thermal efficiency, ultra-quiet operation, indoor\/outdoor installation capability, and flexible plumbing and gas connection options, the ETi 400 is one of Pentair’s most advanced gas heater platforms for customers who want powerful heating with reduced energy waste.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eIdeal For\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIn-ground swimming pools and spas\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCustomers upgrading to a high-efficiency gas heater\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePool owners who want faster heat-up times\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNatural gas pool and spa systems\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIndoor or outdoor heater installations\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eResidential and commercial pool applications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSystems requiring Pentair model 461113\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003ch4\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003e400,000 BTU Heating Power\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eThe ETi 400 provides high-output 400K BTU performance, helping pools and spas reach target temperatures quickly when properly sized and installed.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003e96% Thermal Efficiency\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eWith 96% thermal efficiency, more of the natural gas consumed by the heater is converted directly into pool heat, helping improve energy performance compared with standard-efficiency gas heaters.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eTitan-Tough™ Direct-Fire Titanium Heat Exchanger\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003ePentair’s titanium heat exchanger is built for durability, corrosion resistance, and long-term reliability in pool and spa heating environments.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eASME-Certified Heat Exchanger Construction\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eThe ETi 400 is built with ASME-certified heat exchanger construction, making it suitable for demanding residential and commercial pool applications where code or project requirements may call for ASME-rated equipment.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eNatural Gas Operation\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eThis model is designed for natural gas systems and should be installed only where the gas supply, pressure, ventilation, and local code requirements match the heater specifications.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eIndoor and Outdoor Rated\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eThe ETi 400 is rated for both indoor and outdoor applications, giving pool professionals more installation flexibility when used with the correct venting and combustion-air configuration.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eUltra-Low NOx Certified\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eThe heater is certified for ultra-low NOx emissions, making it suitable for many regions with stricter emissions requirements.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eFlexible Installation Design\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eThe ETi 400 includes installation-friendly features such as rotating controls, front and rear gas connection capability, and flexible orientation options for plumbing and gas line setup.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eUltra-Quiet Operation\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003ePentair designed the ETi 400 for quiet performance, helping reduce equipment pad noise while still delivering powerful pool and spa heating.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eBenefits\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eHeats pools and spas quickly with 400,000 BTU output\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-efficiency design helps reduce wasted energy\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTitanium heat exchanger supports long-term corrosion resistance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eExcellent option for premium residential and commercial pool systems\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIndoor\/outdoor rating gives installers more layout flexibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUltra-low NOx certification supports cleaner operation\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuiet operation helps improve the backyard pool experience\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStrong replacement choice when the system calls for Pentair 461113\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth class=\"last:pe-10\"\u003eSpecification\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003ePentair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Line\u003c\/td\u003e\n\u003ctd\u003eETi 400\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eHigh-Efficiency Pool \u0026amp; Spa Gas Heater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel \/ Manufacturer Part Number\u003c\/td\u003e\n\u003ctd\u003e461113\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel Type\u003c\/td\u003e\n\u003ctd\u003eNatural Gas\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIgnition Type\u003c\/td\u003e\n\u003ctd\u003eIID\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBTU Output\u003c\/td\u003e\n\u003ctd\u003e400,000 BTU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermal Efficiency\u003c\/td\u003e\n\u003ctd\u003e96%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat Exchanger Material\u003c\/td\u003e\n\u003ctd\u003eTitanium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat Exchanger Construction\u003c\/td\u003e\n\u003ctd\u003eASME Certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003ePool, Spa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation Rating\u003c\/td\u003e\n\u003ctd\u003eIndoor \/ Outdoor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrical\u003c\/td\u003e\n\u003ctd\u003e120\/240V, 60Hz, 1 Phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eListed Amperage\u003c\/td\u003e\n\u003ctd\u003e15 AMP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Flow Rate\u003c\/td\u003e\n\u003ctd\u003e40 GPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Flow Rate\u003c\/td\u003e\n\u003ctd\u003e120 GPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCabinet Dimensions\u003c\/td\u003e\n\u003ctd\u003eApprox. 39.9 in. W x 45.7 in. H x 30 in. D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eListed Product Weight\u003c\/td\u003e\n\u003ctd\u003eApprox. 379 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEmissions\u003c\/td\u003e\n\u003ctd\u003eUltra-Low NOx Certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommercial \/ Residential Use\u003c\/td\u003e\n\u003ctd\u003eCommercial, Residential\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePool Type\u003c\/td\u003e\n\u003ctd\u003eIn-Ground\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003e461113\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC \/ Barcode\u003c\/td\u003e\n\u003ctd\u003e788379877248\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eCustomer-Facing Q\u0026amp;A\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What fuel type does the Pentair ETi 400 461113 use?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This model is designed for natural gas.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How many BTUs is this heater?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The ETi 400 is rated at 400,000 BTU.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this a high-efficiency heater?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. Pentair lists the ETi 400 with 96% thermal efficiency, making it a high-efficiency gas pool and spa heater.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What makes the ETi 400 different from a standard gas heater?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The ETi 400 uses Pentair’s direct-fire titanium heat exchanger, high-efficiency combustion design, ultra-quiet operation, and flexible installation features.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can this heater be installed indoors?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, it is rated for indoor and outdoor installation, but indoor installations must follow Pentair venting instructions, combustion air requirements, and all local codes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this heater for pools, spas, or both?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e It is designed for both pool and spa heating applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is the heat exchanger titanium?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. The ETi 400 features a direct-fire titanium heat exchanger for durability and corrosion resistance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is professional installation required?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. Gas pool heaters should be installed and serviced by qualified pool heater professionals and licensed trades where required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the correct Pentair part number?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The manufacturer part number for this natural gas ETi 400 model is 461113.\u003c\/p\u003e","brand":"Pool Supply Depot LLC","offers":[{"title":"Default Title","offer_id":48753737335094,"sku":"461113","price":9295.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/1167\/9798\/files\/FullSizeRender_00ce93d0-f17f-4cd9-9a15-538253c8e8f6.jpg?v=1713842525","url":"https:\/\/poolsupplydepot.net\/products\/pentair-eti-400-high-efficiency-natural-gas-heater-400k-btu-461113","provider":"Pool Supply Depot","version":"1.0","type":"link"}