Best Window Heat Pump Units for your Space

Last updated on July 26th, 2022 at 04:04 pm

Who doesn’t look for affordable options to maintain a comfortable room temperature all through the year? Getting a heat pump would be a better idea as it cools your space in sweltering summer and warms in freezing winter. There are many models in the market so we have reviewed the top seven to help you pick the best window heat pump.

Considerations When Choosing a Heat Pump Window Unit

Cooling and Heating Capacity (BTU)

  • Capacity depends on the cooling or heating area
  • It ranges between 5,000 and 24,000 BTUs
  • Having high ceilings may require larger heat capacity
  • The kitchen requires 4000 BTUs. Add 600 BTUs for every other person after two people utilizing a space
  • You may require a heater in winter because the heating capacity is lower compared to the cooling capacity

Cooling Area

To help you choose the best unit, room size and recommended cooling capacity is listed below.


Heating Area

  • A window ac with heat pump depends on the warmth in the air
  • For colder areas, purchasing a unit with an in-built heat system will work the best
  • Area less than 1000 sq. ft. requires unit with 15,000 BTUs and areas greater than 1000 sq. ft. need a model between 18,000-24,000 BTUs
  • A window ac with heat pump depends on the warmth in the air
  • For colder areas, purchasing a unit with an in-built heat system will work the best
  • Area less than 1000 sq. ft. requires unit with 15,000 BTUs and areas greater than 1000 sq. ft. need a model between 18,000-24,000 BTUs

Energy Efficiency Rating (EER)

  • For heating, a heating seasonal performance factor (HSPF) of 9.0 is considered to be heat efficient and for cooling, a seasonal energy efficiency ratio (SEER) of 15
  • Energy star rated heat and air window units use 20-50% less energy than others

Noise Levels

  • Check the decibels while buying because the unit in the bedroom needs to be quieter than the kitchen
  • Units with 55-58 decibels are peaceful


  • Heat and air window units having 18,000 BTUs or greater need a 208-230 volt connection
  • These units can be installed on both single and double window

Price and Warranty

  • Heat pump units cost between $100-$2000. The cheaper units have basic functionality and can be installed in small spaces
  • Different manufacturers offer different warranty periods based on the models. Longer warranty periods are better

 Best Window Heat Pump


1.      MIDEA Window Mounted Heat Pump

window heat pump


Well-designed and cools quickly

Simple and quick installation

Quiet operation

Good value of money


Modifications required for aluminum window frames

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  • Dimensions: 22” x 19” x 14.7”
  • Weight: 75 lbs
  • Cooling Capacity: 12,000 BTU
  • Cooling Area: 550 sq. ft.
  • Operating Modes: 3

The MIDEA window mounted heat pump offers 3-in-1 functionality that combines air conditioning, fan, and moisture removal. This 12,000 BTU unit cools 550 sq. ft. space so you can install it in your home or office for a comfortable environment. It has an easy installation with the installation equipment included. You can read the instruction manual for details.

The remote control has an LED display panel from where you can control all the settings. Fresh air flows into your space to maintain a healthy lifestyle. This allows you to stay comfortable while you work and the 24h timer saves energy. The sleep button adjusts the temperature at night according to your sleep cycle.

2.      Koldfront WAC12001W Small Window Heat Pump

Small Window Heat Pump


  • Powerful air conditioner
  • Does not weigh much
  • Thermostat to maintain the required temperature
  • Three fan speeds
  • Consumes less energy compared to other models
  • Reasonable price


  • Requires 230V outlet connection
  • Cold air can enter through a thin filter

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  • Dimensions: 16.1” x 22.6” x 23”
  • Weight: 88.4 lbs
  • BTUs (Cool/Heat): 12,000/11,000
  • Room Size (Cool/Heat): 550/400 sq. ft.
  • Voltage: 208/230 V
  • Energy Efficiency Ratio: 10.9
  • Operating Modes: 3

This small window heat pump provides 12,000 BTUs cooling capacity to cool 550 sq. ft. space and 11,000 BTUs heating capacity that is enough to heat 400 sq. ft. It does not require any wall sleeve so it mounts directly to the window. The window height should be 16 inches and a width between 27 and 36 inches. This ac heat pump window unit requires a special 230V outlet as it does not operate with the standard 115V.

You can set your required temperature using the thermostat. There are three fan modes to be adjusted if you feel cold and also a dehumidifying mode. The sleep mode adjusts the temperature to save energy. You get a remote control to easily operate the fan speed, temperature, and other features.

3.      Koldfront WTC8001W Window Unit Heat Pump

Window Unit Heat Pump


  • Energy saver mode
  • Three fan speeds
  • 4-way adjustable louvers
  • Quiet unit


  • No auto temperature setting in heating mode

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  • Dimensions: 14.5” x 24” x 20.3”
  • Weight: 65 lbs
  • BTUs (Cool/Heat): 8,000/4,200
  • Room Size (Cool/Heat): 350/100 sq. ft.
  • Voltage: 115V
  • Energy Efficiency Ratio: 9.6
  • Operating Modes: 3

The Koldfront WTC8001W window heat pump offers 8,000 BTU for cooling and a lower heat capacity for heating that is 4,200 BTU. It services 350 sq. ft. room for cooling and 100 sq. ft. for heating. It is compatible with the Koldfront AC wall sleeve that comes separately and maintains the temperature between 17oC and 30OC.

You can set your required temperature and control the fan speed, energy-saving mode, and 24h timer. The remote control allows you to adjust fan speed from anywhere in the area. You must keep in mind that the lower BTU heating only provides additional heating to the main heating source. There are three fan speeds and four-way air maneuvering louvers. The dehumidification capacity is 45 pints/day. This window heat and air unit comes with a 2-year warranty.

4.      Frigidaire FFRH1822R2 Heat Pump Window Unit

Heat Pump


  • Quiet operation
  • Easy cleaning and filter lights up to notify
  • Auto-restart function


  • 230V outlet installation is required

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  • Dimensions: 25.4” x 23.6” x 18”
  • BTUs (Cool/Heat): 18,500/16,000
  • Room Size: 1,050 sq. ft.
  • Voltage: 230V

This window AC with heat pumps has a cooling capacity of 18,500 BTU that can easily cool a 1,050 sq. ft. room. It provides 16,000 BTU supplemental heat and air-dries 5.5 pints/hour. It has three fan speeds and three cooling/heating speeds. The 8-way design allows you to control the direction of airflow and the energy saver mode saves you from high electricity bills.

The low noise level keeps you comfortable. You get a mounting kit but you require a 230V outlet connection so your electrician can help you with that. The filter mesh is washable to allow clean and odorless air.

5.      Frigidaire Window Mounted Heat Pump

Heat Pump Window


  • Powerful window air conditioner
  • Quiet operation
  • Remote control displays room temperature


  • Requires a 230V electrical outlet

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  • Dimensions: 27.4” x 23.6” x 17.7”
  • Weight: 115 lbs
  • Cooling Capacity: 18,000 lbs
  • Room Size: 1,020 sq. ft.
  • Energy Efficiency Ratio: 11.8

This heat pump window unit offers 18,000 BTUs and quickly cools the space up to 1,020 sq. ft. The quiet operation does not disturb you while you are asleep. Low power startup conserves energy to save you from bills. It dehumidifies up to 5.2 pints per hour.

The ready-to-select options allow you to easily control the temperature. A three-speed fan allows speed adjustment and the 8-way air control allows to control airflow direction. To avoid allergic reactions from polluted air, the clean air ionizer cleans the impurities. You need a 230V outlet to install it. This window heat and air unit comes with a 1-year warranty.

6.      NINGPU Portable Heat Pump

Portable Heat Pump


  • Good value of money
  • Not so loud


  • Not much powerful
  • Cools well up to 300 sq. ft. only

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  • Dimensions: 16.5” x 19” x 34.9”
  • Weight: 70 lbs
  • Cooling Capacity: 14,000 lbs
  • Cooling Area: 500 sq. ft.
  • Voltage: 115 V
  • Operating Modes: 3

The NINGPU portable heat pump cools up to 500 sq. ft. as it possesses a 14,000 BTU cooling capacity. You can keep it in your bedroom, lounge, office, or any other space. It features 3-in-1 technology combining cooling, dehumidifying, and fan options. The select-control panel has an up/down button for fan speed, timer, and temperature variations. It has an in-built dehumidifier that dries up to 50 pints /day. You just need to install it with three steps using the window kit.

7.      LG Window Unit Heat Pump

Window Unit Heat Pump


  • Powerful air conditioner
  • Quiet operation
  • Efficient moisture remover


  • Modification is required for installing in aluminum window frames
  • The refrigerant used is not much eco-friendly

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  • Dimensions: 23.6” x 22.06” x 15”
  • Weight: 93 lbs
  • BTUs (Cool/Heat): 12,000/11,200
  • Room Size (Cool/Heat): 550/450 sq. ft.
  • Voltage: 230 V
  • Energy Efficiency Ratio: 11.3
  • Operating Modes: 3

This LG model and Koldfront WAC12001W have similar cooling and heating capacities that are 12,000 BTU and 11,200 BTU respectively. LG unit is expensive than the Koldfront. This versatile and attractive unit has a digital display for temperature and remote control to operate while lying cozily in your bed. It has 2 fan speeds and 2 cooling/heating speeds.

Its energy-saving mode keeps your bills controlled. The filter mesh is washable and notifies when cleaning is required. This heat pump removes moisture from the air up to 3.3 pints/hour. It can cool 550 sq. ft. and heat 450 sq. ft but 230V output needs to be installed.


To keep yourself comfortable in extreme temperatures, you need to get the best window heat pump. These window conditioners with air pumps save energy and work well in small spaces. The best selling models in the market have been listed here, you can read the window heat pump reviews to find the best one according to the weather conditions at your place, your budget, and living space.

For further understanding, you can visit window unit heat pump.


What is the best quality heat pump?

The best window heat pump should be powerful enough to cool/heat your room. It should have an easy installation and maintenance. The features like auto-restart, auto-timer, remote control, thermostat, filter notifier, adjustable fan speeds, e-touchpad, and wifi-compatibility should be included for convenience. In this list, MIDEA window mounted unit is the best rated that provides quick cooling and has automated features.

What is a window heat pump?

A window heat pump is a unit that provides cold air in summer and warm air in winter. It is installed on the window or through the wall of your room. Working as an AC, it removes hot air from your space and moves it through a coil having refrigerant gas. This way the heat is removed and you receive cold air. For heating, the cold air from outside is moved through the coil having refrigerant to give you warm air.

What is the most reliable mini split heat pump?

Mitsubishi brand is known to be the best mini split heat pump as it has a great number of sales. MXZ H2I has a heating capacity range of 12,600 to 48,000 BTU that allows air conditioning in 2-8 areas. It offers 11.3 HSPF and 19.1 SEER. The base heater prevents freezing in extreme cold. It is 76% effective at -25OC.

Is it better to oversize or undersize a heat pump?

An oversized heat pump is expensive, has reduced efficiency, and produces great energy costs. The desired temperature is achieved quickly and the system shuts down often causing fluctuations and improper humidity control whereas an undersized heat pump works on the maximum capacity to reach the required temperature that can cause compressor failure.

The set temperature must be reached quickly so that less energy is used by the heat pump while keeping the efficiency high to provide comfort.

Why does my heat pump use so much electricity?

If you frequently change the temperature, your heat pump utilizes energy while moving the temperature up and down. Maintain a temperature to use less power. Reducing it by 1oC  will cut down 2.5% of your energy costs. For instance, if your set temperature is 22oC, you can reduce it to 21oC.

More power will be used if the water-heating temperature is set too high. Reducing the temperature to 40oC will provide efficient heating. Clogged filters reduce airflow decreasing performance. Poor maintenance results in a 25% increment in energy costs. You need to wash your filters regularly for improved performance.

Using your heat pump with a solar PV panel decreases the running cost by 40%.



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