{"product_id":"pentair-461113-eti-400-high-efficiency-pool-heater","title":"Pentair | 461113 | ETi 400 High-Efficiency Pool Heater – 400,000 BTU, Natural Gas, Titanium Heat Exchanger","description":"\u003ch2\u003e\n\u003cmeta charset=\"utf-8\"\u003eBetter Way To Heat Your Pool:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e3-year Parts and Labor Warranty.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEfficient: Save up to 14% on energy costs compared to a traditional gas heater.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThe ETi 400 is designed to accommodate the features that make your pool be at the right temperature every time you want to go in for a swim.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUpgrade Option: Plumbing aligns to MasterTemp High Performance Heater, for easy drop-in replacement. \u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSee how this power couple brings the heat.\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eUp to 96% Thermal Efficiency:\u003c\/strong\u003e For every $1 of natural gas that’s piped into the heater, 96 cents go directly to heating your pool. That translates into faster heat-up times and bigger energy savings for you.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCorrosion-resistant TitanTough Direct-Fire Titanium Heat Exchanger\u003c\/strong\u003e is a tough heat exchanger that ensures you years of high-quality, trustworthy warmth.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrade from the MasterTemp High-Performance Heater\u003c\/strong\u003e with a drop-in replacement that has similar parts.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFlexible installation options\u003c\/strong\u003e include easy venting and a multiple keypad interface that can always face the way you need it to for headache-free access.\u003c\/p\u003e\n\u003cp\u003e\u003cimg height=\"998\" width=\"633\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0808\/6319\/9544\/files\/Brochure_ETi400_250High-EfficiencyHeaters.jpg?v=1707272645\" alt=\"ETi 400 Pool Heater Pentair\"\u003e\u003c\/p\u003e\n\u003ch2\u003eProduct Components:   \u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eStands up to the toughest conditions 1,800° F flame temperatures and pool water chemistry are all in a day’s work for titanium.     \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDesign elements that boost durability and efficiency. No welds, crimps or joints that reduce corrosion resistance. Tubing is shaped for maximum flow and efficiency.           \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIndustrial chemical processors lean on titanium. When handling concentrated chlorine compounds, industrial processors rely on the corrosion resistance of titanium piping and heat exchangers.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eUnmatched Durability And Efficiency:     \u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eEASY TO VENT PROPERLY:\u003c\/strong\u003e Fully sealed Category IV direct-air vent does not require large room openings for combustion air.    \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eULTRA-QUIET OPERATION: \u003c\/strong\u003eGreat for you, great for your neighbors.    \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eINSTALL IN LEFT OR RIGHT ORIENTATION: The rotatable\u003c\/strong\u003e front door allows control pad to be rotated 180 degrees, so this heater can be plumbed on the right- or left-hand side. Corrosion-resistant TitanTough Direct-Fire Titanium Heat Exchanger is the strongest heat exchanger ever built - for years of high - quality, trustworthy warmth.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e96% thermal efficiency, the highest efficiency ever built in its class. Flexible installation features, including orientation options for gas line connection.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eQuick access to the Keypad controller.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLarge removable panels make accessing the heater internals quick and easy.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e────────────────────────────────────────\u003c\/p\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto [content-visibility:auto] supports-[content-visibility:auto]:[contain-intrinsic-size:auto_100lvh] R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-69ed3017-cb7c-83e8-99f3-dedd59fc1a7d-51\" data-testid=\"conversation-turn-242\" data-scroll-anchor=\"false\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"e6c4cd3b-920d-428b-bdb6-f43fc75da298\" dir=\"auto\" data-message-model-slug=\"gpt-5-5-thinking\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-turn-start-message=\"true\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full wrap-break-word dark markdown-new-styling\"\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=\"310\"\u003e\u003cstrong data-start=\"79\" data-end=\"142\"\u003eQ: What is the Pentair 461113 ETi 400 pool heater used for?\u003c\/strong\u003e\u003cbr data-start=\"142\" data-end=\"145\"\u003eA: The Pentair 461113 ETi 400 is a 400,000 BTU natural gas pool and spa heater designed for high-efficiency heating in large residential and commercial pool systems.\u003c\/p\u003e\n\u003chr data-start=\"312\" data-end=\"315\"\u003e\n\u003cp data-start=\"317\" data-end=\"486\"\u003e\u003cstrong data-start=\"317\" data-end=\"369\"\u003eQ: Is the Pentair 461113 natural gas or propane?\u003c\/strong\u003e\u003cbr data-start=\"369\" data-end=\"372\"\u003eA: This model is designed for natural gas. Propane versions may be available under different Pentair part numbers.\u003c\/p\u003e\n\u003chr data-start=\"488\" data-end=\"491\"\u003e\n\u003cp data-start=\"493\" data-end=\"709\"\u003e\u003cstrong data-start=\"493\" data-end=\"554\"\u003eQ: What size pool is the Pentair 461113 ETi 400 best for?\u003c\/strong\u003e\u003cbr data-start=\"554\" data-end=\"557\"\u003eA: This 400K BTU heater is best for large pools, spas, pool\/spa combinations, and high-demand applications that need fast heating and strong efficiency.\u003c\/p\u003e\n\u003chr data-start=\"711\" data-end=\"714\"\u003e\n\u003cp data-start=\"716\" data-end=\"936\"\u003e\u003cstrong data-start=\"716\" data-end=\"762\"\u003eQ: Is the Pentair 461113 ETi 400 worth it?\u003c\/strong\u003e\u003cbr data-start=\"762\" data-end=\"765\"\u003eA: Yes. It is a premium option for pool owners who want 96% thermal efficiency, natural gas operation, quiet performance, and long-term titanium heat exchanger durability.\u003c\/p\u003e\n\u003chr data-start=\"938\" data-end=\"941\"\u003e\n\u003cp data-start=\"943\" data-end=\"1172\"\u003e\u003cstrong data-start=\"943\" data-end=\"1001\"\u003eQ: What is the benefit of the titanium heat exchanger?\u003c\/strong\u003e\u003cbr data-start=\"1001\" data-end=\"1004\"\u003eA: The TitanTough titanium heat exchanger provides excellent corrosion resistance and durability, making it ideal for harsh pool water conditions and long service life.\u003c\/p\u003e\n\u003chr data-start=\"1174\" data-end=\"1177\"\u003e\n\u003cp data-start=\"1179\" data-end=\"1386\"\u003e\u003cstrong data-start=\"1179\" data-end=\"1250\"\u003eQ: Is the Pentair 461113 more efficient than a standard gas heater?\u003c\/strong\u003e\u003cbr data-start=\"1250\" data-end=\"1253\"\u003eA: Yes. The ETi 400 is designed for up to 96% thermal efficiency, helping reduce energy use compared to traditional gas pool heaters.\u003c\/p\u003e\n\u003chr data-start=\"1388\" data-end=\"1391\"\u003e\n\u003cp data-start=\"1393\" data-end=\"1604\"\u003e\u003cstrong data-start=\"1393\" data-end=\"1451\"\u003eQ: Can the Pentair 461113 replace a MasterTemp heater?\u003c\/strong\u003e\u003cbr data-start=\"1451\" data-end=\"1454\"\u003eA: Yes. The ETi 400 is designed as an upgrade option with plumbing alignment for easier replacement of compatible MasterTemp High Performance heaters.\u003c\/p\u003e\n\u003chr data-start=\"1606\" data-end=\"1609\"\u003e\n\u003cp data-start=\"1611\" data-end=\"1840\"\u003e\u003cstrong data-start=\"1611\" data-end=\"1676\"\u003eQ: Does the Pentair 461113 require professional installation?\u003c\/strong\u003e\u003cbr data-start=\"1676\" data-end=\"1679\"\u003eA: Yes. Professional installation is recommended due to natural gas sizing, plumbing, electrical wiring, venting, orientation setup, and local code requirements.\u003c\/p\u003e\n\u003chr data-start=\"1842\" data-end=\"1845\"\u003e\n\u003cp data-start=\"1847\" data-end=\"2085\"\u003e\u003cstrong data-start=\"1847\" data-end=\"1930\"\u003eQ: Can the Pentair 461113 be installed with left or right plumbing orientation?\u003c\/strong\u003e\u003cbr data-start=\"1930\" data-end=\"1933\"\u003eA: Yes. The ETi 400 offers flexible installation options, including left or right orientation, with a rotatable front door and accessible keypad design.\u003c\/p\u003e\n\u003chr data-start=\"2087\" data-end=\"2090\"\u003e\n\u003cp data-start=\"2092\" data-end=\"2330\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\u003cstrong data-start=\"2092\" data-end=\"2168\"\u003eQ: Why choose the Pentair ETi 400 instead of a standard 400K BTU heater?\u003c\/strong\u003e\u003cbr data-start=\"2168\" data-end=\"2171\"\u003eA: Choose the ETi 400 if you want higher efficiency, titanium corrosion resistance, ultra-quiet operation, flexible venting, and premium long-term performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"z-0 flex min-h-[46px] justify-start\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"mt-3 w-full empty:hidden\"\u003e\n\u003cdiv class=\"text-center\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":47791453798712,"sku":"461113","price":9499.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0808\/6319\/9544\/files\/FullSizeRender_00ce93d0-f17f-4cd9-9a15-538253c8e8f6.jpg?v=1777755053","url":"https:\/\/appaetechpoolsupply.com\/products\/pentair-461113-eti-400-high-efficiency-pool-heater","provider":"AppaeTech Pool Supply","version":"1.0","type":"link"}