{"title":"Hayward Heaters and Heat Pumps","description":null,"products":[{"product_id":"hayward-heatpro-heat-pump-70-000-btu-240v-hp70ha2","title":"Hayward HP70HA2 Heatpro Heat Pump 70,000 BTU 240V HP70HA2","description":"\u003cul\u003e \u003cli data-section-id=\"m7liez\" data-start=\"473\" data-end=\"493\"\u003e \u003cstrong data-start=\"475\" data-end=\"483\"\u003eSKU:\u003c\/strong\u003e HP70HA2\u003c\/li\u003e \u003cli data-section-id=\"2s27xv\" data-start=\"494\" data-end=\"533\"\u003e \u003cstrong data-start=\"496\" data-end=\"517\"\u003eHeating Capacity:\u003c\/strong\u003e 70,000 BTU\/hr\u003c\/li\u003e \u003cli data-section-id=\"1jmiu4i\" data-start=\"534\" data-end=\"559\"\u003e \u003cstrong data-start=\"536\" data-end=\"548\"\u003eVoltage:\u003c\/strong\u003e 208\/230V\u003c\/li\u003e \u003cli data-section-id=\"1p6cwb0\" data-start=\"560\" data-end=\"576\"\u003e \u003cstrong data-start=\"562\" data-end=\"572\"\u003ePhase:\u003c\/strong\u003e 1\u003c\/li\u003e \u003cli data-section-id=\"4dc6yf\" data-start=\"577\" data-end=\"597\"\u003e \u003cstrong data-start=\"579\" data-end=\"589\"\u003eHertz:\u003c\/strong\u003e 60 Hz\u003c\/li\u003e \u003cli data-section-id=\"1hv1s5l\" data-start=\"598\" data-end=\"622\"\u003e \u003cstrong data-start=\"600\" data-end=\"614\"\u003eKilowatts:\u003c\/strong\u003e 21 kW\u003c\/li\u003e \u003cli data-section-id=\"17qjepq\" data-start=\"623\" data-end=\"660\"\u003e \u003cstrong data-start=\"625\" data-end=\"650\"\u003eMaximum Breaker Size:\u003c\/strong\u003e 60 amps\u003c\/li\u003e \u003cli data-section-id=\"1sz9e81\" data-start=\"661\" data-end=\"704\"\u003e \u003cstrong data-start=\"663\" data-end=\"677\"\u003ePool Type:\u003c\/strong\u003e Above Ground \/ In Ground\u003c\/li\u003e \u003cli data-section-id=\"a3e8vg\" data-start=\"705\" data-end=\"731\"\u003e \u003cstrong data-start=\"707\" data-end=\"720\"\u003ePlatform:\u003c\/strong\u003e Side Air\u003c\/li\u003e \u003cli data-section-id=\"1unqrs1\" data-start=\"732\" data-end=\"762\"\u003e \u003cstrong data-start=\"734\" data-end=\"756\"\u003eHeating + Cooling:\u003c\/strong\u003e Yes\u003c\/li\u003e \u003cli data-section-id=\"q3mo0p\" data-start=\"763\" data-end=\"795\"\u003e \u003cstrong data-start=\"765\" data-end=\"780\"\u003eCompressor:\u003c\/strong\u003e Single-speed\u003c\/li\u003e \u003cli data-section-id=\"etzhtk\" data-start=\"796\" data-end=\"830\"\u003e \u003cstrong data-start=\"798\" data-end=\"812\"\u003eFan Motor:\u003c\/strong\u003e Multi-Speed ECM\u003c\/li\u003e \u003cli data-section-id=\"1lheaus\" data-start=\"831\" data-end=\"863\"\u003e \u003cstrong data-start=\"833\" data-end=\"852\"\u003eHeat Exchanger:\u003c\/strong\u003e Titanium\u003c\/li\u003e \u003cli data-section-id=\"1ub5zqz\" data-start=\"864\" data-end=\"901\"\u003e \u003cstrong data-start=\"866\" data-end=\"882\"\u003eConnections:\u003c\/strong\u003e 2\" × 2.5\" unions\u003c\/li\u003e \u003cli data-section-id=\"18vznex\" data-start=\"902\" data-end=\"935\"\u003e \u003cstrong data-start=\"904\" data-end=\"926\"\u003eMinimum Flow Rate:\u003c\/strong\u003e 25 GPM\u003c\/li\u003e \u003cli data-section-id=\"nvysjf\" data-start=\"936\" data-end=\"969\"\u003e \u003cstrong data-start=\"938\" data-end=\"960\"\u003eMaximum Flow Rate:\u003c\/strong\u003e 38 GPM\u003c\/li\u003e \u003cli data-section-id=\"9kwsis\" data-start=\"970\" data-end=\"1018\"\u003e \u003cstrong data-start=\"972\" data-end=\"995\"\u003eProduct Dimensions:\u003c\/strong\u003e 35\" × 45.25\" × 18.5\"\u003c\/li\u003e \u003cli data-section-id=\"away82\" data-start=\"1019\" data-end=\"1049\"\u003e \u003cstrong data-start=\"1021\" data-end=\"1040\"\u003eProduct Weight:\u003c\/strong\u003e 207 lb\u003c\/li\u003e \u003cli data-section-id=\"1d6tmd6\" data-start=\"1050\" data-end=\"1100\"\u003e \u003cstrong data-start=\"1052\" data-end=\"1076\"\u003eShipping Dimensions:\u003c\/strong\u003e 39.8\" × 19.7\" × 48.4\"\u003c\/li\u003e \u003cli data-section-id=\"1lvl87v\" data-start=\"1101\" data-end=\"1132\"\u003e \u003cstrong data-start=\"1103\" data-end=\"1123\"\u003eShipping Weight:\u003c\/strong\u003e 270 lb\u003c\/li\u003e \u003c\/ul\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSupplied under part number HP70HA2 for exact-match ordering.\u003c\/li\u003e\n\u003cli\u003eBTU rating: 70,000 BTU.\u003c\/li\u003e\n\u003cli\u003eVoltage: 240V.\u003c\/li\u003e\n\u003cli\u003eSized by BTU output — match the rating and fuel type to your existing unit.\u003c\/li\u003e\n\u003cli\u003eShips from our US warehouse with tracking on dispatch.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Hayward\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e HP70HA2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Pool Heaters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e New\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBTU rating:\u003c\/strong\u003e 70,000 BTU\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 240V\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eWhat part number is this pool heater?\u003c\/h3\u003e\u003cp\u003eThis item is supplied under part number HP70HA2. Match that number against your equipment's parts diagram before ordering.\u003c\/p\u003e\u003ch3\u003eDoes the BTU rating have to match my old heater?\u003c\/h3\u003e\u003cp\u003eThe BTU rating should match or exceed your previous heater. Undersizing means the pool never reaches temperature on cold days; oversizing costs more up front but heats faster and cycles less.\u003c\/p\u003e\u003ch3\u003eCan this run on propane instead of natural gas?\u003c\/h3\u003e\u003cp\u003eNo. Gas pool heaters are built for one fuel and require a manufacturer conversion kit to change. Check the data plate on your existing unit and order the matching fuel type.\u003c\/p\u003e\u003ch3\u003eWhat size heater do I need for my pool?\u003c\/h3\u003e\u003cp\u003eA common rule is 1 BTU per gallon as a minimum, increased for windy sites, uncovered pools, or cold climates. A 20,000 gallon pool typically starts at 250,000 BTU.\u003c\/p\u003e\u003ch3\u003eDo I need a professional to install a pool heater?\u003c\/h3\u003e\u003cp\u003eGas heaters involve gas line sizing, venting and electrical connections, and most jurisdictions require a licensed installer plus a permit. Improper installation voids the manufacturer warranty.\u003c\/p\u003e\u003ch3\u003eHow do I confirm this part fits my equipment?\u003c\/h3\u003e\u003cp\u003eCheck the part number stamped on the component you are replacing, or find it on the parts schematic in your owner's manual. If the number differs or is unreadable, send us your equipment model and serial number and we will verify fitment before you order.\u003c\/p\u003e\u003ch3\u003eHow quickly does this ship?\u003c\/h3\u003e\u003cp\u003eIn-stock items ship from our US warehouse on business days. You will receive tracking by email once the order leaves the warehouse.\u003c\/p\u003e\u003ch3\u003eCan I return it if I ordered the wrong part?\u003c\/h3\u003e\u003cp\u003eUnopened, uninstalled items can be returned within 30 days. Equipment that has been installed or plumbed cannot be returned, so confirm fitment before installation.\u003c\/p\u003e\u003ch3\u003eIs this covered by a warranty?\u003c\/h3\u003e\u003cp\u003eManufacturer warranty terms vary by brand and product. Warranty claims generally require proof of purchase and, on installed equipment, evidence of professional installation.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What part number is this pool heater?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This item is supplied under part number HP70HA2. Match that number against your equipment's parts diagram before ordering.\"}},{\"@type\":\"Question\",\"name\":\"Does the BTU rating have to match my old heater?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The BTU rating should match or exceed your previous heater. Undersizing means the pool never reaches temperature on cold days; oversizing costs more up front but heats faster and cycles less.\"}},{\"@type\":\"Question\",\"name\":\"Can this run on propane instead of natural gas?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. Gas pool heaters are built for one fuel and require a manufacturer conversion kit to change. Check the data plate on your existing unit and order the matching fuel type.\"}},{\"@type\":\"Question\",\"name\":\"What size heater do I need for my pool?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A common rule is 1 BTU per gallon as a minimum, increased for windy sites, uncovered pools, or cold climates. A 20,000 gallon pool typically starts at 250,000 BTU.\"}},{\"@type\":\"Question\",\"name\":\"Do I need a professional to install a pool heater?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Gas heaters involve gas line sizing, venting and electrical connections, and most jurisdictions require a licensed installer plus a permit. Improper installation voids the manufacturer warranty.\"}},{\"@type\":\"Question\",\"name\":\"How do I confirm this part fits my equipment?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Check the part number stamped on the component you are replacing, or find it on the parts schematic in your owner's manual. If the number differs or is unreadable, send us your equipment model and serial number and we will verify fitment before you order.\"}},{\"@type\":\"Question\",\"name\":\"How quickly does this ship?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"In-stock items ship from our US warehouse on business days. You will receive tracking by email once the order leaves the warehouse.\"}},{\"@type\":\"Question\",\"name\":\"Can I return it if I ordered the wrong part?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Unopened, uninstalled items can be returned within 30 days. Equipment that has been installed or plumbed cannot be returned, so confirm fitment before installation.\"}},{\"@type\":\"Question\",\"name\":\"Is this covered by a warranty?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Manufacturer warranty terms vary by brand and product. Warranty claims generally require proof of purchase and, on installed equipment, evidence of professional installation.\"}}]}\u003c\/script\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":54193884365164,"sku":"HP70HA2","price":2861.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1000\/0872\/2796\/files\/Screenshot2026-05-27112243_df496615-9c5d-4c48-9ed1-c5060a60cf42.png?v=1786833354"},{"product_id":"hayward-hp21405t-140-000-btu-heat-only-240v-heatpro-mchx-series-heat-pump","title":"Hayward HP21405T 140,000 BTU Heat Only 240V HeatPro Mchx Series Heat Pump","description":"\u003cp data-start=\"449\" data-end=\"914\"\u003eHayward HP21405T is a HeatPro MCHX Series heat pump designed for efficient in-ground pool heating with advanced microchannel heat exchanger technology. This 140,000 BTU heat-only model is built to extend swim season while helping reduce operating costs compared with traditional heating methods. Hayward’s current product page positions it as part of the newer HeatPro MCHX lineup for dependable, energy-conscious pool heating. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e \u003cp data-start=\"916\" data-end=\"956\"\u003e────────────────────────────────────────\u003c\/p\u003e \u003cp data-start=\"958\" data-end=\"970\"\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e \u003cp data-start=\"972\" data-end=\"2259\"\u003e• Hayward HP21405T is a HeatPro MCHX Series heat-only heat pump rated at 140,000 BTU. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"1095\" data-end=\"1098\"\u003e• This model is a \u003cstrong data-start=\"1116\" data-end=\"1129\"\u003eheat-only\u003c\/strong\u003e unit, not a heat-and-cool model. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"1200\" data-end=\"1203\"\u003e• Hayward identifies HP21405T as part of the newer HeatPro MCHX Series lineup using microchannel heat exchanger technology. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"1364\" data-end=\"1367\"\u003e• The current model is listed on 240V-class power, with retailer listings commonly showing 240V and Hayward’s official page presenting the product in the current MCHX family. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"1579\" data-end=\"1582\"\u003e• Hayward’s HeatPro MCHX line is positioned for efficient pool heating performance to help lower energy and operating costs. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"1744\" data-end=\"1747\"\u003e• The product is intended for in-ground pool heating applications and is sold as part of Hayward’s premium HeatPro platform. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"1909\" data-end=\"1912\"\u003e• Hayward’s official page also links the unit to the current Heat Pump MCHE installation and operation manual and HeatPro literature. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"2083\" data-end=\"2086\"\u003e• Current market listings and Hayward product references consistently identify HP21405T as the 140K BTU heat-only model in this series. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e \u003cp data-start=\"2261\" data-end=\"2301\"\u003e────────────────────────────────────────\u003c\/p\u003e \u003cp data-start=\"2303\" data-end=\"2319\"\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/p\u003e \u003cp data-start=\"2321\" data-end=\"2854\"\u003eThe Hayward HP21405T HeatPro MCHX Series Heat Pump is built for pool owners and service professionals who want higher-capacity in-ground pool heating from a current Hayward heat pump platform. With its 140,000 BTU output and heat-only configuration, it is designed for users focused on extending swim season and maintaining warmer pool temperatures without moving to a heat-and-cool model. Hayward’s current materials frame this unit around the newer MCHX platform and its microchannel design. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e \u003cp data-start=\"2856\" data-end=\"3345\"\u003eWhat makes this model especially appealing is the combination of capacity and updated platform positioning. Hayward’s official listing highlights the current HeatPro MCHX Series branding, while broader product references and retailers consistently present HP21405T as the 140K BTU heat-only option. For listing purposes, the strongest version is to identify it as a HeatPro MCHX Series heat pump rather than using a more generic HeatPro title alone.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e \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-5\" data-testid=\"conversation-turn-150\" data-scroll-anchor=\"false\" data-turn=\"assistant\"\u003e \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 \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 \u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e \u003cdiv data-message-author-role=\"assistant\" data-message-id=\"12df32b2-0afd-40e1-858f-3d643793ec82\" 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 \u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e \u003cdiv class=\"markdown prose dark:prose-invert w-full wrap-break-word dark markdown-new-styling\"\u003e \u003cp data-start=\"0\" data-end=\"40\"\u003e────────────────────────────────────────\u003c\/p\u003e \u003ch2 data-section-id=\"w1c0q0\" data-start=\"42\" data-end=\"77\"\u003eFrequently Asked Questions (FAQ)\u003c\/h2\u003e \u003cp data-start=\"79\" data-end=\"288\"\u003e\u003cstrong data-start=\"79\" data-end=\"147\"\u003eQ: What is the Hayward HP21405T HeatPro MCHX heat pump used for?\u003c\/strong\u003e\u003cbr data-start=\"147\" data-end=\"150\"\u003eA: The Hayward HP21405T is a 140,000 BTU heat-only pool heat pump designed for efficient in-ground pool heating and swim season extension.\u003c\/p\u003e \u003chr data-start=\"290\" data-end=\"293\"\u003e \u003cp data-start=\"295\" data-end=\"449\"\u003e\u003cstrong data-start=\"295\" data-end=\"361\"\u003eQ: Is the Hayward HP21405T a heat-only or heat-and-cool model?\u003c\/strong\u003e\u003cbr data-start=\"361\" data-end=\"364\"\u003eA: The HP21405T is a heat-only model. It is designed to heat pool water, not cool it.\u003c\/p\u003e \u003chr data-start=\"451\" data-end=\"454\"\u003e \u003cp data-start=\"456\" data-end=\"667\"\u003e\u003cstrong data-start=\"456\" data-end=\"511\"\u003eQ: What size pool is the Hayward HP21405T best for?\u003c\/strong\u003e\u003cbr data-start=\"511\" data-end=\"514\"\u003eA: This 140,000 BTU heat pump is best for medium to large in-ground pools where efficient temperature maintenance and extended swim season are important.\u003c\/p\u003e \u003chr data-start=\"669\" data-end=\"672\"\u003e \u003cp data-start=\"674\" data-end=\"866\"\u003e\u003cstrong data-start=\"674\" data-end=\"714\"\u003eQ: Is the Hayward HP21405T worth it?\u003c\/strong\u003e\u003cbr data-start=\"714\" data-end=\"717\"\u003eA: Yes. It is a strong option for pool owners who want a high-capacity, energy-efficient heat pump from Hayward’s current HeatPro MCHX Series lineup.\u003c\/p\u003e \u003chr data-start=\"868\" data-end=\"871\"\u003e \u003cp data-start=\"873\" data-end=\"1072\"\u003e\u003cstrong data-start=\"873\" data-end=\"927\"\u003eQ: What voltage does the Hayward HP21405T require?\u003c\/strong\u003e\u003cbr data-start=\"927\" data-end=\"930\"\u003eA: The Hayward HP21405T is commonly listed as a 240V-class heat pump and should be installed on a properly sized dedicated electrical circuit.\u003c\/p\u003e \u003chr data-start=\"1074\" data-end=\"1077\"\u003e \u003cp data-start=\"1079\" data-end=\"1304\"\u003e\u003cstrong data-start=\"1079\" data-end=\"1140\"\u003eQ: Is the Hayward HP21405T better than a gas pool heater?\u003c\/strong\u003e\u003cbr data-start=\"1140\" data-end=\"1143\"\u003eA: It depends on your needs. A heat pump is usually more efficient for maintaining pool temperature, while a gas heater typically heats faster in colder weather.\u003c\/p\u003e \u003chr data-start=\"1306\" data-end=\"1309\"\u003e \u003cp data-start=\"1311\" data-end=\"1527\"\u003e\u003cstrong data-start=\"1311\" data-end=\"1371\"\u003eQ: Is the Hayward HP21405T suitable for saltwater pools?\u003c\/strong\u003e\u003cbr data-start=\"1371\" data-end=\"1374\"\u003eA: Yes. Hayward heat pumps are designed for treated pool water systems, including chlorine and saltwater pools when proper water chemistry is maintained.\u003c\/p\u003e \u003chr data-start=\"1529\" data-end=\"1532\"\u003e \u003cp data-start=\"1534\" data-end=\"1774\"\u003e\u003cstrong data-start=\"1534\" data-end=\"1601\"\u003eQ: Does the Hayward HP21405T require professional installation?\u003c\/strong\u003e\u003cbr data-start=\"1601\" data-end=\"1604\"\u003eA: Yes. Professional installation is recommended because the unit requires proper electrical service, plumbing, water flow, equipment clearance, and code-compliant setup.\u003c\/p\u003e \u003chr data-start=\"1776\" data-end=\"1779\"\u003e \u003cp data-start=\"1781\" data-end=\"2025\"\u003e\u003cstrong data-start=\"1781\" data-end=\"1836\"\u003eQ: How fast will the Hayward HP21405T heat my pool?\u003c\/strong\u003e\u003cbr data-start=\"1836\" data-end=\"1839\"\u003eA: Heating speed depends on pool size, outdoor air temperature, starting water temperature, wind exposure, cover use, and runtime. Heat pumps are best for steady temperature maintenance.\u003c\/p\u003e \u003chr data-start=\"2027\" data-end=\"2030\"\u003e \u003cp data-start=\"2032\" data-end=\"2287\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\u003cstrong data-start=\"2032\" data-end=\"2112\"\u003eQ: When should I choose the Hayward HP21405T instead of a smaller heat pump?\u003c\/strong\u003e\u003cbr data-start=\"2112\" data-end=\"2115\"\u003eA: Choose the HP21405T if you have a larger in-ground pool, want stronger heating capacity, or need more reliable temperature maintenance during cooler swim-season weather.\u003c\/p\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e \u003cdiv class=\"z-0 flex min-h-[46px] justify-start\"\u003e\u003cbr\u003e\u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/section\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSupplied under part number HP21405T for exact-match ordering.\u003c\/li\u003e\n\u003cli\u003eBTU rating: 140,000 BTU.\u003c\/li\u003e\n\u003cli\u003eVoltage: 240V.\u003c\/li\u003e\n\u003cli\u003eSized by BTU output — match the rating and fuel type to your existing unit.\u003c\/li\u003e\n\u003cli\u003eShips from our US warehouse with tracking on dispatch.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Hayward\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e HP21405T\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Pool Heaters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e New\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBTU rating:\u003c\/strong\u003e 140,000 BTU\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 240V\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eWhat part number is this pool heater?\u003c\/h3\u003e\u003cp\u003eThis item is supplied under part number HP21405T. Match that number against your equipment's parts diagram before ordering.\u003c\/p\u003e\u003ch3\u003eDoes the BTU rating have to match my old heater?\u003c\/h3\u003e\u003cp\u003eThe BTU rating should match or exceed your previous heater. Undersizing means the pool never reaches temperature on cold days; oversizing costs more up front but heats faster and cycles less.\u003c\/p\u003e\u003ch3\u003eCan this run on propane instead of natural gas?\u003c\/h3\u003e\u003cp\u003eNo. Gas pool heaters are built for one fuel and require a manufacturer conversion kit to change. Check the data plate on your existing unit and order the matching fuel type.\u003c\/p\u003e\u003ch3\u003eWhat size heater do I need for my pool?\u003c\/h3\u003e\u003cp\u003eA common rule is 1 BTU per gallon as a minimum, increased for windy sites, uncovered pools, or cold climates. 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Match that number against your equipment's parts diagram before ordering.\"}},{\"@type\":\"Question\",\"name\":\"Does the BTU rating have to match my old heater?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The BTU rating should match or exceed your previous heater. Undersizing means the pool never reaches temperature on cold days; oversizing costs more up front but heats faster and cycles less.\"}},{\"@type\":\"Question\",\"name\":\"Can this run on propane instead of natural gas?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. Gas pool heaters are built for one fuel and require a manufacturer conversion kit to change. Check the data plate on your existing unit and order the matching fuel type.\"}},{\"@type\":\"Question\",\"name\":\"What size heater do I need for my pool?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A common rule is 1 BTU per gallon as a minimum, increased for windy sites, uncovered pools, or cold climates. 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Engineered for performance and compliance, this heater blends fast heat-up times, low NOx emissions, and durable construction into a compact, easy-to-install design.\u003c\/p\u003e \u003cp data-start=\"998\" data-end=\"1242\"\u003eWith digital controls, robust thermal efficiency, and corrosion-resistant components, the Universal HC Series delivers consistent warmth for year-round comfort, while meeting air quality standards in regions with strict emissions regulations.\u003c\/p\u003e \u003ch2 data-start=\"1249\" data-end=\"1271\"\u003e\u003cstrong data-start=\"1252\" data-end=\"1269\"\u003e\u003cstrong data-start=\"583\" data-end=\"638\"\u003eHayward HDF275 Universal HC Series Dual Fuel Heater \u003c\/strong\u003eCompatibility\u003c\/strong\u003e\u003c\/h2\u003e \u003cul data-start=\"1272\" data-end=\"1632\"\u003e \u003cli data-start=\"1272\" data-end=\"1347\"\u003e \u003cp data-start=\"1274\" data-end=\"1347\"\u003eWorks with \u003cstrong data-start=\"1285\" data-end=\"1324\"\u003enatural gas or propane fuel systems\u003c\/strong\u003e (field convertible).\u003c\/p\u003e \u003c\/li\u003e \u003cli data-start=\"1348\" data-end=\"1429\"\u003e \u003cp data-start=\"1350\" data-end=\"1429\"\u003eCompatible with \u003cstrong data-start=\"1366\" data-end=\"1402\"\u003estandard 2” plumbing connections\u003c\/strong\u003e on pool and spa systems.\u003c\/p\u003e \u003c\/li\u003e \u003cli data-start=\"1430\" data-end=\"1530\"\u003e \u003cp data-start=\"1432\" data-end=\"1530\"\u003eIntegrates with \u003cstrong data-start=\"1448\" data-end=\"1482\"\u003eHayward automation controllers\u003c\/strong\u003e and most third-party pool management systems.\u003c\/p\u003e \u003c\/li\u003e \u003cli data-start=\"1531\" data-end=\"1632\"\u003e \u003cp data-start=\"1533\" data-end=\"1632\"\u003eSuitable for \u003cstrong data-start=\"1546\" data-end=\"1596\"\u003eresidential and light commercial installations\u003c\/strong\u003e requiring mid-range heating output.\u003c\/p\u003e \u003c\/li\u003e \u003c\/ul\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCompatible replacement built to Hayward specification HDF275 — not manufactured by Hayward.\u003c\/li\u003e\n\u003cli\u003eBTU rating: 275,000 BTU.\u003c\/li\u003e\n\u003cli\u003eSized by BTU output — match the rating and fuel type to your existing unit.\u003c\/li\u003e\n\u003cli\u003eShips from our US warehouse with tracking on dispatch.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Hayward\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e HDF275\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Pool Heaters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e New\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBTU rating:\u003c\/strong\u003e 275,000 BTU\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShipping weight:\u003c\/strong\u003e 135 lb\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eIs the HDF275 an original Hayward part or a compatible replacement?\u003c\/h3\u003e\u003cp\u003eThe HDF275 is a compatible replacement built to match Hayward specification. It is not manufactured by Hayward and carries no Hayward branding or warranty.\u003c\/p\u003e\u003ch3\u003eDoes the BTU rating have to match my old heater?\u003c\/h3\u003e\u003cp\u003eThe BTU rating should match or exceed your previous heater. Undersizing means the pool never reaches temperature on cold days; oversizing costs more up front but heats faster and cycles less.\u003c\/p\u003e\u003ch3\u003eCan this run on propane instead of natural gas?\u003c\/h3\u003e\u003cp\u003eNo. Gas pool heaters are built for one fuel and require a manufacturer conversion kit to change. Check the data plate on your existing unit and order the matching fuel type.\u003c\/p\u003e\u003ch3\u003eWhat size heater do I need for my pool?\u003c\/h3\u003e\u003cp\u003eA common rule is 1 BTU per gallon as a minimum, increased for windy sites, uncovered pools, or cold climates. A 20,000 gallon pool typically starts at 250,000 BTU.\u003c\/p\u003e\u003ch3\u003eDo I need a professional to install a pool heater?\u003c\/h3\u003e\u003cp\u003eGas heaters involve gas line sizing, venting and electrical connections, and most jurisdictions require a licensed installer plus a permit. Improper installation voids the manufacturer warranty.\u003c\/p\u003e\u003ch3\u003eHow do I confirm this part fits my equipment?\u003c\/h3\u003e\u003cp\u003eCheck the part number stamped on the component you are replacing, or find it on the parts schematic in your owner's manual. If the number differs or is unreadable, send us your equipment model and serial number and we will verify fitment before you order.\u003c\/p\u003e\u003ch3\u003eHow quickly does this ship?\u003c\/h3\u003e\u003cp\u003eIn-stock items ship from our US warehouse on business days. You will receive tracking by email once the order leaves the warehouse.\u003c\/p\u003e\u003ch3\u003eCan I return it if I ordered the wrong part?\u003c\/h3\u003e\u003cp\u003eUnopened, uninstalled items can be returned within 30 days. Equipment that has been installed or plumbed cannot be returned, so confirm fitment before installation.\u003c\/p\u003e\u003ch3\u003eIs this covered by a warranty?\u003c\/h3\u003e\u003cp\u003eManufacturer warranty terms vary by brand and product. Warranty claims generally require proof of purchase and, on installed equipment, evidence of professional installation.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Is the HDF275 an original Hayward part or a compatible replacement?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The HDF275 is a compatible replacement built to match Hayward specification. 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