A pool that's swum most of the year where steady, low-cost heat matters more than fast heat-up.
★★★★★ 230+ Google Reviews · CPO C-105377 · 40+ years of combined founder experience
Sizing comes first.The right heater is set by your pool's surface area and the temperature rise you want, and by the flow your pump and plumbing deliver. Start with the heater size calculator; we confirm it on site before quoting.
This model hasn't been through our rating yet.
HP21405T
Pending
From the manufacturer's documents listed under Sources. Where the documents disagree, the table says so.
| Manufacturer product name | HeatPro MCHX Series Heat Pump, 140,000 BTU, Heat Only |
|---|---|
| Heating capacity | 138,000 BTU/hr at 80°F air / 80% RH / 80°F water; 128,000 BTU/hr at 80°F air / 63% RH; 82,000 BTU/hr at 50°F air / 63% RH |
| COP | 5.7 at 80/80/80; 5.5 at 80/63/80; 4.0 at 50/63/80 |
| Heat or heat and cool | Heat only (HP31405T is the Heat+Chill version) |
| Heat exchanger | Titanium condenser (water side) |
| Air-side coil | Microchannel evaporator with Trivalent Chromium Process (TCP) coating |
| Electrical | 230V, 1 phase, 60 Hz |
| Minimum circuit ampacity | 42.5 A |
| Breaker | 50 A recommended; 70 A maximum overcurrent protection |
| Rated power input | 8,300 W |
| Refrigerant | R-410A, 4 lb 14 oz charge |
| Water connections | 2"; 10.25" inlet-to-outlet spacing |
| Water flow | 30 GPM minimum, 75 GPM maximum, 60 GPM recommended |
| Operating range | Water 40-104°F (104°F maximum inlet); air 40-115°F; automatic defrost cycle |
| Clearances | 12" perimeter, 24-36" front for service, top unobstructed (72" under an overhang), 60" from the pool or spa wall; outdoor installation only |
| Weight | 233 lb |
| Controls and automation | Onboard digital control with a published display code index (FLo, LP, HP, SO, SS, FS, dSO, dSS); two-wire remote on terminal J7 with a bypass mode, which is how it joins a Hayward Omni control system. |
Parts
5 years
Labor
2 years
Heat exchanger
10 years
| Parts | 5 years |
|---|---|
| Labor | 2 years field labor (3 years when sold by a Hayward Rewards dealer) |
| Heat exchanger | 10 years on the titanium tube (in-ground) |
These are the manufacturer's published terms. Terms can depend on the installer, the dealer program and where the heater was bought, and they change without notice, so we confirm the exact term for your install on the written quote.
Titanium doesn't corrode in pool water, so it's the standard on quality heat pumps and the reason a heat pump can sit on a salt pool for years without exchanger trouble. It costs more, which is why it's rare on gas heaters, and the ETi 400 is the exception here.
See every material side by side on the comparison page, or read the Hayward H-Series and HeatPro error codes guide for what the display is telling you.
Most to least forgiving of salt and unbalanced water.
GulfStream · HE Series
A pool that's swum most of the year where steady, low-cost heat matters more than fast heat-up.
Automation relay (no heater app)
Built Right · XW Series
A pool that's swum most of the year where steady, low-cost heat matters more than fast heat-up.
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Raypak · Crosswind V
A pool that's used most of the year and could use a chill option in late summer, with steady, low-cost heat the rest of the time.
Built-in Wi-Fi
Every figure on this page comes from these manufacturer documents. We re-open each one and match the model number, capacity and efficiency before the date moves. How we verify.
| Document | Type | Last checked |
|---|---|---|
| Hayward — HP21405T product pagehayward.com | Product page | October 14, 2026 |
| Hayward — HeatPro heat pump Installation and Operation Manual 51300122601 Rev C (capacity, COP, titanium condenser, flow, clearances, display codes)hayward.com | Manual or guide | October 14, 2026 |
| Hayward — 2026 Expert Line residential warranty termscommerce.hayward-pool-assets.com | Warranty terms | October 14, 2026 |
| Hayward — warranty resource page (Expert Line vs Open Line, Hayward Rewards)hayward.com | Warranty terms | October 14, 2026 |
Manufacturers revise terms without notice. Treat this page as a starting point and confirm the current terms before you buy. If something here is out of date, tell us and we'll fix it.
Parts: 5 years. Labor: 2 years field labor (3 years when sold by a Hayward Rewards dealer). Heat exchanger: 10 years on the titanium tube (in-ground). These are the manufacturer's terms as published; warranty terms change and can depend on the installer and the channel, so we confirm the exact term for your install on the written quote.
The HP21405T is rated at 138,000 BTU/hr heating output. Heater size comes from your pool's surface area and the temperature rise you want, not from gallons, and the pump and plumbing have to deliver the flow the heater needs. Use our heater size calculator for a starting number, and we confirm it on site before quoting.
Not directly. The HP21405T connects to pool automation through a relay, and the heater has no app of its own.
Titanium doesn't corrode in pool water, so it's the standard on quality heat pumps and the reason a heat pump can sit on a salt pool for years without exchanger trouble. It costs more, which is why it's rare on gas heaters, and the ETi 400 is the exception here.
Every figure on this page comes from the manufacturer's own documents, listed under Sources with the date we last checked them. Manufacturers revise terms without notice, so treat the page as a starting point and confirm the current terms on your quote.
We quote, install and service Hayward heaters across Palm Beach and Broward, managed by us under our Florida Certified Pool/Spa Contractor license (CPC1461731). You get a free on-site sizing visit and one written price. Gas lines, new circuits and refrigerant work are done by licensed contractors we manage.
We call back within 30 minutes during business hours.
