Looking Beyond the AQUASTRONG Swimming Pool Heater Above? 6 Alternatives Worth a Look

Comparing Other Heat Pump Options

DOEL 58,000 BTU Inverter Pool Heat Pump

The DOEL 58,000 BTU Inverter Pool Heat Pump shares the same 48-inch height limit and app connectivity as the AQUASTRONG. However, it differs in physical footprint, measuring 43 inches in length compared to the AQUASTRONG’s 39 inches. The DOEL is slightly taller at 29 inches versus 25.6 inches, but narrower at 16 inches wide. It uses a black finish, whereas the AQUASTRONG is white. Both units offer dual-mode heating and cooling for large pools. You might choose the DOEL if you prefer a darker aesthetic or need the specific 58,000 BTU output profile. The DOEL maintains the same inverter efficiency standards but presents a different spatial requirement for your poolside area.

NATURAQUELL 90,000 BTU Inverter Pool Heat Pump

The NATURAQUELL 90,000 BTU Inverter Pool Heat Pump is significantly larger than the AQUASTRONG. It stands 29.2 inches high and measures 41.6 inches long, with a width of 16.3 inches. It weighs 143 pounds, which is 26 pounds more than the AQUASTRONG. While the AQUASTRONG fits pools up to 48 inches deep, the NATURAQUEVEL is designed for larger in-ground pools. It shares the app control and inverter technology but offers a higher BTU capacity. If you have a substantial in-ground pool and need more heating power, this unit is a robust alternative. The trade-off is its larger physical size and greater weight, requiring more space and a stronger foundation for installation.

AQUASTRONG HEX035TOP Heat Pump

The AQUASTRONG HEX035TOP Heat Pump offers a unique top-vent design that distinguishes it from the standard side-vent AQUASTRONG model. It measures 20 inches in width and height, with a length of 20 inches, making it much more compact than the original 20x43x48-inch unit. This square footprint allows it to fit into tighter spaces around your pool. It retains the high COP efficiency and app control of the brand’s lineup. If you have limited poolside real estate or need a heater for a saltwater pool, this compact version is ideal. It sacrifices some of the external surface area for a smaller, more versatile installation profile while maintaining strong heating performance.

WARMBLU 23,000-Gallon Inverter Pool Heat Pump

The WARMBLU 23,000-Gallon Inverter Pool Heat Pump is built for 220V power, unlike the standard 110V setups often found in similar compact units. It measures 43 inches in height and 28.2 inches in length, with a width of 17.5 inches. This unit is taller than the AQUASTRONG but has a smaller footprint. It is designed for large inground pools and offers quiet operation with app management. If you have 220V power available and need a heater that handles larger water volumes efficiently, this is a strong choice. It shares the inverter technology for energy savings but requires a different electrical connection. The WARMBLU provides a robust solution for pools that need sustained heating without frequent cycling.

VARMINPOOL 105,000 BTU Inverter Heat Pump

The VARMINPOOL 105,000 BTU Inverter Heat Pump is a heavy-duty option weighing 176 pounds, significantly more than the AQUASTRONG’s 117 pounds. It measures 29.2 inches in height and 41.6 inches in length, with a width of 16.3 inches. It features a deep grey color and is designed for large residential pools. Like the AQUASTRONG, it offers app control and dual-mode heating and cooling. The VARMINPOOL provides higher BTU output for faster heating in larger bodies of water. If you prioritize raw heating power and smart control over a lighter, more compact unit, this model is suitable. It requires more space and a sturdy base due to its weight and larger dimensions.

ACiQ 120,000 BTU Inverter Pool Heat Pump

The ACiQ 120,000 BTU Inverter Pool Heat Pump is the largest and heaviest option, weighing 312 pounds. It measures 42 inches in height, 34 inches in length, and 36 inches in width. It also requires 220V power. This unit is designed for very large pools where efficient, high-capacity heating is essential. It shares the app control and inverter efficiency features but in a much larger chassis. If you have a massive pool and ample space, this unit offers substantial heating power. The trade-off is its significant size and weight, which demand careful placement and a robust installation site. It is best for users who need maximum output and do not have space constraints.

Quick picks

Our 7 picks

1 Best overall

AQUASTRONG Dual-Mode Inverter Pool Heat Pump

Best for: Dual-mode heating and cooling in larger pools

Heating Capacity

100,000 BTU

Voltage

220V

Compressor Technology

Full DC variable frequency

Operational Modes

Heating and cooling

COP Rating

15.8

Connectivity

WiFi, app

View on Amazon: AQUASTRONG Dual-Mode Inverter Pool Heat Pump

This AQUASTRONG pool heat pump handles both heating up to 104°F and cooling down to 47°F for above-ground and inground setups up to 20 by 43 feet. It features a full DC variable frequency inverter delivering a 15.8 COP, operates at 55 dB, and connects via mobile app. You get three plumbing adapter kits and built-in automatic defrost.

Pros

• Dual-mode system provides heating up to 104°F and cooling down to 47°F
• Full DC variable frequency inverter achieves a 15.8 COP rating
• Low operational sound level of 55 dB
• Mobile app integration enables remote scheduling and energy tracking

Cons

• Heavy 117-pound frame requires multiple people to lift and place
• Cooling range is capped at a maximum of 83°F

Good fit if

• You want active water heating and chilling in a single system
• You prefer managing temperature targets and schedules through a mobile app
• You need low-noise operation around 55 dB near your pool area

Skip if

• You manage a pool exceeding the 20 by 43 foot design footprint
• You need a lightweight, portable heater that one person can move solo

Verdict: AQUASTRONG 20x43 ft Inverter Pool Heat Pump suits pool owners who need efficient dual-season climate control managed directly from a smartphone. Its 15.8 COP inverter build delivers quiet heating and cooling for pools up to 48 inches deep.

2 Best budget

DOEL 58,000 BTU Inverter Pool Heat Pump

Best for: Large pools needing efficient heating

Heating Capacity

119000 BTU

Pool Capacity

30,000 gallons

Compressor Technology

Full DC inverter

Operational Modes

Heating and cooling

COP Rating

15.8

Connectivity

WiFi, mobile app

View on Amazon: DOEL 58,000 BTU Inverter Pool Heat Pump

The DOEL pool heat pump handles pools up to 30,000 gallons with 58,000 BTU of heating power. It uses a full DC inverter compressor for a 15.8 COP rating, which means high efficiency. You get both heating and cooling modes via a WiFi app. The unit measures 20 by 43 by 48 inches and runs at 59 dB. It fits well for large spaces needing precise temperature control.

Pros

• 58,000 BTU heating capacity
• 15.8 COP efficiency rating
• WiFi app and LCD control
• Heating and cooling modes

Cons

• 59 dB noise level
• Requires lightning protection
• IPX4 waterproof rating only

Good fit if

• You have a large pool up to 30,000 gallons
• You want both heating and cooling
• You prefer app-based control

Skip if

• You need silent operation under 50 dB
• You want a smaller footprint
• You need higher weather resistance than IPX4

Verdict: DOEL 58,000 BTU Heat Pump offers strong efficiency for large pools. It suits owners who want app control and cooling options.

3 Also great

NATURAQUELL 90,000 BTU Inverter Pool Heat Pump

Best for: Heating and cooling large in-ground pools

Heating Capacity

90,000 BTU/h

Pool Capacity

Up to 26,000 gallons

Compressor Technology

Full inverter

Operational Modes

Heating and cooling

COP Rating

Up to 16.00

Connectivity

Smart Life app, Wi-Fi

View on Amazon: NATURAQUELL 90,000 BTU Inverter Pool Heat Pump

This NATURAQUELL heat pump handles pools up to 26,000 gallons. It uses a full inverter compressor to maintain steady water temperatures between 5°F and 104°F. The unit offers both heating and cooling modes with a high COP rating of 16.00. You control it via a Smart Life app or the on-unit touch panel. It connects easily with adjustable 2-inch fittings.

Pros

• Full inverter compressor for steady temperature control
• Heating and cooling modes for year-round use
• Smart Life app and Wi-Fi connectivity
• High COP rating up to 16.00
• Adjustable 2-inch inlet/outlet connectors

Cons

• Larger footprint at 20x40x62 inches
• Heavier at 143 pounds
• No remote control included

Good fit if

• You need both heating and cooling for your pool
• You want precise temperature control via an app
• You have space for a larger outdoor unit

Skip if

• You only need heating for above-ground pools
• You have limited space for a 20-foot wide unit
• You prefer a simpler manual control interface

Verdict: NATURAQUELL 90,000 BTU Inverter Heat Pump suits pool owners who want precise, app-controlled heating and cooling for larger in-ground pools. It is a solid choice for those prioritizing steady temperatures and smart features over compact size.

4 Best premium

AQUASTRONG HEX035TOP Heat Pump

Best for: Large pools in tight spaces

Heating Capacity

140,000 BTU

Pool Capacity

42,000 Gallons

Compressor Technology

Full Inverter

COP Rating

12

Use

Poolside, Inground Pools

Height

48"

View on Amazon: AQUASTRONG HEX035TOP Heat Pump

This AQUASTRONG heat pump uses full inverter technology to maintain water temperature efficiently. It delivers 110,000 BTU of heating power for pools up to 32,000 gallons. The top air flow design allows installation in tight spaces where side-vent models fail. It operates at 37dB and achieves a 12 COP rating. You get a durable titanium heat exchanger suitable for saltwater. This unit includes adapters for easy setup.

Pros

• 110,000 BTU heating capacity for large pools
• 12 COP rating with full inverter technology
• Top discharge design fits tight spaces
• Titanium heat exchanger for saltwater compatibility
• Quiet 37dB operation

Cons

• Larger physical footprint than compact alternatives
• No digital display or remote control mentioned
• Requires 220V connection for full performance

Good fit if

• You need heating for a pool up to 32,000 gallons
• You have limited side clearance for installation
• You want a quiet unit for residential areas

Skip if

• You have a pool larger than 32,000 gallons
• You require a compact unit for tight corners
• You need a 120V plug-and-play solution

Verdict: AQUASTRONG 25x34x48" Inverter Pool Heater suits owners of large pools needing efficient heating in constrained spaces. Its top vent design and high COP make it a strong option for saltwater users.

5 Also great

WARMBLU 23,000-Gallon Inverter Pool Heat Pump

Best for: large inground pools with 220V power

Heating Capacity

80,000 BTU

Pool Capacity

23,000 Gallons

Voltage

220V

Compressor Technology

Inverter

COP Rating

16

Connectivity

WiFi App Control

View on Amazon: WARMBLU 23,000-Gallon Inverter Pool Heat Pump

This WARMBLU unit is an inverter pool heat pump designed for inground pools up to 23,000 gallons. It runs on 220V power and features a titanium heat exchanger with a COP rating up to 16.0. You get mobile app control and a touch panel for easy management. The compressor technology ensures efficient operation. It is a strong option for large pools where energy efficiency and quiet performance matter most.

Pros

• Inverter compressor with COP up to 16.0
• Pure titanium heat exchanger for corrosion resistance
• Mobile app and touch panel control
• Operates below 50 dB for quiet use

Cons

• Requires 220V electrical connection
• Lacks a physical remote control
• Only includes a 12-month warranty

Good fit if

• You have an inground pool up to 23,000 gallons
• You need a 220V power source for installation
• You want mobile app control for your heater

Skip if

• You only have an above ground pool
• Your electrical system only supports 110V
• You need a remote control for operation

Verdict: WARMBLU 23,000 Gal Inverter Heat Pump offers high efficiency for large inground pools. It suits owners with 220V power who value quiet operation and app management.

6 Also great

VARMINPOOL 105,000 BTU Inverter Heat Pump

Best for: large inground pools needing smart control

Heating Capacity

105,000 BTU

Pool Capacity

30,000 Gallons

Operational Modes

Heating and Cooling

Connectivity

WiFi App

Use

Poolside, Inground Pools

Weight

176 pounds

View on Amazon: VARMINPOOL 105,000 BTU Inverter Heat Pump

This VARMINPOOL unit delivers 105,000 BTU for pools up to 30,000 gallons. It heats and cools water for year-round comfort. Smart WiFi control lets you adjust settings via app or touchscreen. The unit operates quietly at 43 dB. Weighing 176 pounds, it is built for outdoor inground pool installations. The deep grey housing resists weather.

Pros

• 105,000 BTU heating capacity for large pools
• Dual heating and cooling functions
• WiFi app and touchscreen control with timer
• Quiet operation at 43 dB

Cons

• Heavy at 176 pounds, requiring sturdy support
• Large footprint of 20 by 40 by 60 inches
• Limited to 120V power input

Good fit if

• You have an inground pool under 30,000 gallons
• You want remote app control for temperature
• You need quiet operation near living spaces

Skip if

• You have a pool larger than 30,000 gallons
• You need a 220V power connection
• You want a compact unit for small decks

Verdict: VARMINPOOL 105K BTU Inground Pool Heater fits large residential pools needing smart control. It suits owners who value quiet, app-managed heating and cooling.

7 Also great

ACiQ 120,000 BTU Inverter Pool Heat Pump

Best for: Large pools needing efficient smart heating

Heating Capacity

120,000 BTU

Pool Capacity

18,000 to 33,000 gallons

Voltage

220V

Compressor Technology

Inverter

Operational Modes

Heating and cooling

COP Rating

Up to 15.23

View on Amazon: ACiQ 120,000 BTU Inverter Pool Heat Pump

This ACiQ unit delivers 120,000 BTU of heating and cooling for pools between 18,000 and 33,000 gallons. It uses an inverter compressor to adjust speed, achieving a COP rating of up to 15.23. The system operates on 220V power and includes Wi-Fi connectivity for app control. You get smart modes for fast heating or quiet operation. It fits well in outdoor spaces with its top-discharge design.

Pros

• High COP rating of up to 15.23 for efficiency
• Wi-Fi connectivity with Smart Life app support
• Operates in ambient temperatures from 14°F to 109°F
• Quiet 59 dBA sound output level

Cons

• Requires 220V electrical connection
• Heavy at 312 pounds
• Large footprint of 36 by 34 inches

Good fit if

• You have a 220V outlet near your pool
• You want precise temperature control via an app
• You need both heating and cooling functions

Skip if

• You only have standard 110V outlets available
• You have limited space for a 36-inch wide unit
• You prefer a lighter, easier-to-move system

Verdict: ACiQ 120K BTU Inverter Pool Heater suits large pools where you need efficient heating and smart control. It is ideal for users who value energy savings and app-based management over compact size.

Specifications side by side

Frequently asked questions