Pool Heaters & Heat Pumps
Best Pool Heaters for Inground Pools (2026): 5 Models Side by Side
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The MICOE leads for inground pools at 75,000 BTU, with heating and cooling for pools up to 21,000 gallons and app control. The NATURAQUELL covers pools up to 10,000 gallons at 42,000 BTU, while the TURBRO, AQUASTRONG and POOLTOHOT cover 10,000, 6,500 and 12,000 gallons.
Starting out? See the main guide: Best Pool Heater
Top picks at a glance
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Best OverallMICOE 75,000 BTU Pool Heat Pump9.8 View on Amazon -
9.5 View on Amazon -
9.3 View on Amazon -
9.3 View on Amazon -
Also GreatPOOLTOHOT Pool Heater for Inground Pools9.2 View on Amazon
Compare the specs
Ranked on heat output, phone app control from each listing, plus how many buyers have rated it. A dash (—) means we could not confirm that figure from the listing.
| Pick | Heat output | Phone app control | Weight | Warranty |
|---|---|---|---|---|
| 1. MICOE 75,000 BTU Pool Heat Pump | 75,000 BTU | Yes | — | — |
| 2. NATURAQUELL Swimming Pool Heat Pump Inverter | 42,000 BTU | Yes | — | 3-year |
| 3. TURBRO 33,000 BTU Inverter Swimming Pool Heat | 33,000 BTU | Yes | — | 2-year |
| 4. AQUASTRONG Swimming Pool Heater for Above Ground | 18,000 BTU | — | 72 lb | 3-year |
| 5. POOLTOHOT Pool Heater for Inground Pools | 40,000 BTU | Yes | 103 lb | 3-year |
MICOE 75,000 BTU Pool Heat Pump
It delivers 75,000 BTU for pools up to 21,000 gallons, with heating and cooling modes and app control.
- Heat output: 75,000 BTU, the most here
- Phone app control
Good for
- Pools up to 21,000 gallons needing heating and cooling
- Buyers who want app control and a titanium exchanger
Skip it if
- You need more than 75,000 BTU of heat output
- You need a pool larger than 21,000 gallons
The titanium heat exchanger suits freshwater and saltwater systems, and the air-source design moves heat from the surrounding air. Heating runs from 46 to 104 degrees and cooling from 45 to 82 degrees, with auto-defrost for colder weather. It operates at approximately 53 dB, and the ABS cabinet resists UV exposure and corrosion.
NATURAQUELL Swimming Pool Heat Pump Inverter
It delivers 42,000 BTU for pools up to 10,000 gallons, with heating and cooling modes and WiFi control.
- Heat output: 42,000 BTU
- Phone app control
- 3-year warranty stated
Good for
- Pools up to 10,000 gallons needing heating and cooling
- Buyers who want a touchscreen and WiFi control
Skip it if
- You need more than 42,000 BTU of heat output
- You need a pool larger than 10,000 gallons
Heating runs from 47 to 104 degrees and cooling from 47 to 83 degrees, with Heating, Cooling, ECO, Boost and Auto modes. A 4-inch touchscreen handles on-unit operation, and the Smart Life app handles remote adjustment and timer settings. Noise runs as low as 50 dB, and the titanium heat exchanger resists corrosion.
TURBRO 33,000 BTU Inverter Swimming Pool Heat
It delivers 33,000 BTU for pools up to 10,000 gallons, with heating and cooling modes and WiFi control.
- Heat output: 33,000 BTU
- Phone app control
- 2-year warranty stated
Good for
- Pools up to 10,000 gallons needing heating and cooling
- Buyers who want a titanium exchanger for saltwater pools
Skip it if
- You need more than 33,000 BTU of heat output
- You need a pool larger than 10,000 gallons
Water temperature sets from 46 to 104 degrees, and the full DC inverter compressor adjusts power for a stable temperature. A four-way valve switches between heating and cooling, and the titanium exchanger resists corrosion. The warranty runs 2 years on the full machine, with 5 years on the compressor.
AQUASTRONG Swimming Pool Heater for Above Ground
It delivers 18,000 BTU for pools up to 6,500 gallons, with heating and cooling modes and a smart control panel.
- Heat output: 18,000 BTU
- 3-year warranty stated
Good for
- Pools up to 6,500 gallons needing heating and cooling
- Buyers who want quiet operation at 38 dB
Skip it if
- You need more than 18,000 BTU of heat output
- You need a pool larger than 6,500 gallons
Heating runs from 41 to 104 degrees and cooling from 41 to 83 degrees, with a thermostat accurate to 2 degrees. Noise is held at 38 dB, and an auto-defrost system removes ice buildup without manual intervention. It weighs 72 lb, and the warranty runs 3 years.
POOLTOHOT Pool Heater for Inground Pools
It delivers 40,000 BTU for pools up to 12,000 gallons, with heating and cooling modes and WiFi control.
- Heat output: 40,000 BTU
- Phone app control
- 3-year warranty stated
Good for
- Pools up to 12,000 gallons needing heating and cooling
- Buyers who want a titanium exchanger for saltwater use
Skip it if
- You need more than 40,000 BTU of heat output
- You need a pool larger than 12,000 gallons
Heating runs from 47 to 109 degrees and cooling from 47 to 83 degrees, with a titanium exchanger and R32 refrigerant. Noise runs at 50 dB, and auto-defrost keeps heating stable in freezing weather. It weighs 103 lb, and the warranty runs 3 years.
How to choose
Match BTU and gallons to the pool
Heat output in BTU and the gallon figure decide whether a heater covers a pool. The MICOE gives 75,000 BTU for pools up to 21,000 gallons, and the NATURAQUELL gives 42,000 BTU for pools up to 10,000 gallons. The TURBRO gives 33,000 BTU for pools up to 10,000 gallons, the POOLTOHOT gives 40,000 BTU for pools up to 12,000 gallons, and the AQUASTRONG gives 18,000 BTU for pools up to 6,500 gallons. Compare both figures with the pool size before buying.
Heating and cooling ranges
Every pick here heats and cools, so compare the temperature ranges, not just the BTU figure. The MICOE heats from 46 to 104 degrees and cools from 45 to 82 degrees. The NATURAQUELL heats from 47 to 104 degrees and cools from 47 to 83 degrees, and the POOLTOHOT heats from 47 to 109 degrees and cools from 47 to 83 degrees. The TURBRO sets water temperature from 46 to 104 degrees, and the AQUASTRONG heats from 41 to 104 degrees and cools from 41 to 83 degrees.
Controls, noise and upkeep
The MICOE offers app control, and the NATURAQUELL, TURBRO and POOLTOHOT offer WiFi control, while the AQUASTRONG uses a smart control panel. For noise, the AQUASTRONG holds 38 dB, the NATURAQUELL and POOLTOHOT run at 50 dB, and the MICOE runs at approximately 53 dB.
FAQ
Which heater covers a 21,000 gallon pool?
The MICOE, at 75,000 BTU for pools up to 21,000 gallons, with heating and cooling modes.
Do these heaters cool as well as heat?
Yes, every pick heats and cools. The MICOE cools from 45 to 82 degrees, and the POOLTOHOT cools from 47 to 83 degrees.
Which heaters offer app control?
The MICOE offers app control through a mobile app. The NATURAQUELL offers WiFi control. The TURBRO offers smart WiFi control. The POOLTOHOT offers built-in WiFi control.
What warranty does the TURBRO heater carry?
It carries a 2-year warranty on the full machine, with a 5-year warranty on the compressor.
