Quick answer: The Hayward HeatPro HP21405T is our best-overall pool heat pump — a 140,000 BTU titanium-microchannel unit with a COP around 5.7, meaning roughly $1 of electricity returns $5 of heat. The Pentair UltraTemp 140 edges it out on raw efficiency (COP ~6.0) at a roughly comparable price, while the FibroPool FH270 (70,000 BTU, COP 5.77) delivers heat-pump economics for under $2,000 for smaller pools.
A pool heat pump doesn’t make heat — it moves heat from the air into your water, which is why it can return five or six dollars of warmth for every dollar of electricity. That efficiency is measured as COP, and it’s the number that matters most here. We ranked the best pool heat pumps of 2026 on COP, BTU output, build quality, and running cost — for exact dollar figures at current electricity rates, see our pool heating cost guide.
Best pool heat pumps at a glance
| Heat pump | BTU | Rated COP | Price | Rating |
|---|---|---|---|---|
| Hayward HeatPro HP21405T | 140,000 | ~5.7 | ~$6,500-$7,000 | ★★★★★ |
| Pentair UltraTemp 140 | 140,000 | ~6.0 | ~$5,200-$6,000 | ★★★★½ |
| FibroPool FH270 | 70,000 | 5.77 | ~$1,999 | ★★★★☆ |
| AquaCal SQ160R | 128,000 | 5.7 | ~$5,316 | ★★★★½ |
1. Hayward HeatPro HP21405T — Best Overall
Hayward HeatPro HP21405T (140,000 BTU)
- Titanium heat exchanger — immune to salt and aggressive water chemistry.
- High COP keeps running costs low all season.
- Quiet scroll compressor and a corrosion-proof UV-resistant cabinet.
- Premium price, but the durability pays back over years.
The HeatPro is the heat pump we’d put on our own pool. Its titanium exchanger is the key: it never corrodes, so the unit survives salt systems and years of chemistry swings that eat cheaper coils. The COP of ~5.7 makes it one of the cheapest heaters to run, period. Start your season sooner with fast shipping — try Amazon Prime free for 30 days for two-day delivery.
2. Pentair UltraTemp 140 — Best Premium
Pentair UltraTemp 140 (140,000 BTU)
- Class-leading COP near 6.0 — the lowest running cost we measured.
- Titanium exchanger and an automatic defrost for a wider operating range.
- Very quiet; integrates with Pentair automation systems.
- The most expensive pick, and overkill for small pools.
If efficiency is everything and you already run Pentair equipment, the UltraTemp is the pick. Its higher COP and defrost cycle extend how far into the shoulder season you can keep swimming, and it ties into IntelliCenter automation cleanly — including that same IntelliCenter panel’s freeze protection mode, which is a separate feature from the heat pump’s own defrost cycle and still worth confirming is enabled.
3. FibroPool FH270 — Best Value
FibroPool FH270 (70,000 BTU)
- Heat-pump economics for well under half the price of premium brands.
- 70,000 BTU suits above-ground and smaller in-ground pools up to ~15,000 gallons.
- Simple controls and a straightforward install.
- Cabinet and internals aren't as rugged as Hayward or Pentair.
The FH270 proves you don’t have to spend $4,000 to get heat-pump savings. For a small-to-mid pool it delivers the same COP-driven economics as the big brands at a price that makes the whole switch pay off faster.
4. AquaCal SQ160R — Best for Salt Pools & Warm Climates
AquaCal HeatWave SuperQuiet SQ160R (128,000 BTU)
- Built for hot, humid climates and salt systems — AquaCal's current mid-size flagship, replacing the older SQ145.
- Adds heat/cool switching and built-in PoolSync WiFi that the outgoing SQ145 didn't have.
- High COP and durable titanium construction, with a separate lifetime warranty on the exchanger.
- Priced at the top of the market.
Common in Florida and the Gulf states for good reason, the AquaCal SQ160R is engineered for hot, humid, salty conditions. If that’s your climate and you want quiet, efficient, corrosion-proof heat, it’s a superb — if pricey — choice. See our full AquaCal lineup comparison for the smaller SQ125 and larger SQ225 sizes.
How to choose a pool heat pump
- COP first — Higher COP = lower bills. Aim for 5.0+ and remember the rating assumes warm air.
- Match BTUs to gallons — ~5 BTU/gallon; oversize slightly for faster heat-up. Run the exact numbers for your pool with our BTU calculator and sizing chart, or see our best pool heater for a 20,000-gallon pool picks if that’s close to your volume.
- Titanium exchanger — Essential if you run a salt system; it won’t corrode. See our best pool heater for salt water pools guide for exactly which models (heat pump and gas) are salt-rated.
- Airflow & power — Heat pumps need clear airflow and a dedicated circuit; check both before buying.
- Automate the schedule — A heavy-duty pool heater timer rated for the unit’s amp draw runs it only during set hours instead of cycling all day.
- Own an Intex or Bestway pool? — Standard heat pumps like the FH270 above connect through a cheap hose adapter; see our best pool heater for Intex pools guide for the exact fitting.
- Protect it year-round — A vented pool heater cover keeps rain and debris out of the cabinet without blocking the compressor’s airflow.
- Keep the coil clear — Clogged evaporator fins are the #1 cause of “won’t heat” service calls; our maintenance guide covers the monthly checks that prevent it.
- Expect some drip — Water pooling near the cabinet on a humid day is normal condensate, not a leak; our condensation guide explains how much is expected and how to tell it apart from a real problem.
The bottom line
The Hayward HeatPro is the best all-round pool heat pump — durable titanium, high COP, and a fair price. Choose the Pentair UltraTemp for maximum efficiency, the FibroPool FH270 to save money, or the AquaCal SQ160R for a hot, salty climate. If none of those quite fit, Raypak’s Crosswind V heat pump is a titanium third option that now edges out the HeatPro on COP too (see our Raypak vs. Hayward comparison for how it stacks up against the HeatPro directly), Gulfstream’s HE-RA lineup — now sold under Pentair — undercuts most of these on price at a comparable 6.0 COP, and Jandy’s JE2500T matches the UltraTemp’s COP class if you’re already on Jandy’s AquaLink automation. Whichever you pick, add a solar cover to keep the cheap heat you just bought. Not sure a heat pump is even the right type for your climate? See our gas vs. heat pump comparison for when gas actually wins. And if your heat pump’s compressor starts humming without spinning up, check our capacitor replacement guide before assuming it’s the compressor itself. Before you buy, check our pool heater tax credit guide for the real rebates worth claiming (a $200-$1,000 utility or manufacturer rebate is realistic; a federal credit isn’t).