The 5 Best 12000 BTU Window Air Conditioners

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As the mercury rises, it’s important to get your home ready for the hot weather. While there are several DIY ideas to cool your home, choosing a reliable window air conditioner can help keep you and your family comfortable.

However, you must always determine the size of your room before choosing a window-mounted air conditioner. If your space is approximately 450 to 550 square feet, you should look for the best 12000 BTU window air conditioner.

I recommend using window units because they are less expensive than central units, easy to install, and energy-efficient for small, confined spaces.

The 12000 BTU air conditioner I’ve reviewed below have the same cooling power, but some are more popular and have several customer ratings and reviews than others.

Top 5 Best 12000 BTU Window Air Conditioners

1. MIDEA MAW12R1BWT Window Air Conditioner

The Midea MAW12R1BWT is a powerful window air conditioner that provides fast and efficient cooling for your home. 

Packing a 12,000 BTU cooling capacity and an 11.3 EER rating, it can cool rooms and spaces between 450-550 square feet, making it ideal for living rooms, family rooms, or any room with an open floor plan.

This unit performs three functions in one. It combines air conditioning, dehumidification, and ventilation to give your home the perfect indoor atmosphere. 

It also comes with a remote control that allows you to control the unit from anywhere in the room. The remote, coupled with the digital LED display on the front panel, lets you operate this device even in the dark.

To help you save energy, the Midea MAW12R1BWT features a 24-hour timer, which you can set to turn the unit on and off as you wish. This way, the AC will only run when you deem necessary. In “sleep mode,” the temperature automatically adjusts to match your body’s heat for maximum comfort as you sleep. 

It also features an Eco energy saver mode that shuts off the unit when it reaches the set temperature to save you even more on energy bills.

It’s easy to install and doesn’t require any significant modifications to your window frame to get it to fit. It can fit window spaces between 23 inches – 36 inches wide and 13 inches high. All mounting accessories come with the purchase.


  • Performs three functions in one
  • It is remote controlled
  • It has washable filters
  • Easy to install with all mounting accessories included.
  • Features a 24-hour programmable timer and Eco mode to save energy
  • Operates quietly
  • one-year factory warranty


  • It doesn’t have a heat function

2. Koldfront WAC12001W Heat/Cool Window Air Conditioner

If you’re looking for energy efficiency, then the Koldfront WAC12001W Window Air Conditioner is the perfect addition to your home. 

With a 12,000 BTU cooling power and 11,000 BTU heat functionality, this window AC can service spaces up to 550 square feet. It also has a dehumidification capacity of 60 pints per day to keep you indoors less soggy.

This unit has several energy-saving features, including sleep mode and Eco energy saver mode. The unit has a built-in digital programmable thermostat to give you total control over the amount of cool and heat you need. 

It also has a “check filter” light that alerts you when the filters need cleaning to keep your unit functioning at its best.

The Koldfront WAC12001W features 4-way directional louvers, which you can select to change the direction of airflow to suit your comfort and evenly cool the room. 

Before mounting this window AC, make sure your windows measure between 26 inches-36 inches wide and a minimum height of 16 inches. Nonetheless, it is easy to install, and all installation hardware and weather seals come with the purchase.


  • Has washable filters
  • four-way air direction louvers
  • Has a programmable thermostat
  • It has three fan speeds with auto option
  • 24 hours programmable timer
  • 2- year warranty on parts and labor


  • Requires a special 230 V electrical outlet since the standard 115 V outlet won’t work.
  • The unit is not approved for commercial use.

3. Frigidaire FFRA122WAE Window-Mounted Compact Air Conditioner 

The Frigidaire FFRA122WAE is a powerful compact air conditioner perfect for rooms between 450-550 square feet. It operates efficiently and quietly to cool your room without keeping you awake at night or interfering with normal conversation during the day.

Featuring a 24-hour programmable timer, you can preset your unit to turn on or off in ½ hour increments. As a result, your home stays cool and comfortable at all times without running up your electricity bills. 

An automatic restart feature is included to enable the unit resume operation with all previous settings whenever there is a power surge or outage.

The manufacturer has emphasized on maintenance by including cleanable antibacterial filters that reduce room odors and bacteria for a healthier and more comfortable indoor environment. The “clean filter” alert notifies you when your filter needs cleaning, so you don’t have to worry about forgetting.

This Frigidaire unit also has adjustable side panels that extend to fit your windows, which makes installation easy without significant adjustments to your window frame.


  • Has a washable antibacterial filters
  • Remote controlled
  • It has adjustable side panels for easy installation
  • Has 6- way airflow directions
  • 3 fan speeds
  • Quiet operation
  • Energy-star certified
  • one year warranty for parts and labor


  • Can be a bit loud when the fan is on high speed

4. LG 12,000 BTU Window-Mounted AIR Conditioner with 11,200 BTU Heat Function

The LG LW1216HR Window-Mounted AC can cool or heat spaces between 450-550 square feet. With a 12,000 BTU cooling capacity and 11,200 BTU heat capacity, this unit is perfect for living rooms, large offices, or any area with an open floor plan.

This unit has a digital programmable thermostat that allows you to choose a comfortable temperature level for your room. It has a remote control that lets you power the AC on and off or change between modes with ease.

The LG LW1216HR has washable filters and a filter alarm that lets you know when your filters need cleaning to keep your unit functioning at its best.

It is easy to install and can fit into window frames between 27 inches – 39 inches wide and 16 inches high.


  • It has washable filters
  • It has a digital thermostat
  • It is easy to install
  • It comes with a remote control
  • UL listed
  • one year warranty


  • The heat function is meant to be supplemental to an existing heat source. It has a lower BTU rating than cooling; therefore, it does not treat the same square footage.
  • Requires a special 230 V electrical outlet since it won’t operate properly with the standard 115 V household outlet.
  • The unit is not approved for commercial use.

5. Della 12000 BTU Window Air Conditioner 

The Della 048-TL-WAC12K Window Air Conditioner can fit into window spaces between 23 inches-36 inches wide and a minimum height of 16 inches. 

The unit is easy to set up, and the full installation kit included during purchase ensures that your air conditioner is up and running in no time. 

Some window frames may require pilot holes, so be sure to check the instruction manual before installing the AC.

It is a powerful air conditioner packing 12,000 BTU cooling capacity – 115V and a whopping 12.1 EER rating enough to cool spaces up to 550 square feet.

This 12,000 BTU window AC comes with a remote control that allows you to control the unit from anywhere in the room. 

The remote also has a built-in temperature sensor that adjusts the temperature based on the distance between the remote and the unit to provide accurate thermostat readings.

When set to Eco mode, the unit will automatically shut off as soon as the room attains your set temperature to save energy.


  • Easy to install
  • Performs three functions in 1
  • Adjustable side panels for easy installation
  • Has washable and reusable filters for easy maintenance
  • Energy star rated
  • one year warranty


  •  Can be a bit loud when the fan is on high speed


After calculating the size of your room, you can use the measurement to choose the right cooling capacity.

If a 12,000 BTU window air conditioner isn’t enough for your room, you can go for higher BTU like a 15000 BTU window AC. However, if your room is smaller, go for 10,000 BTU window air conditioner.

Keep in mind that finding the right cooling capacity is important because you don’t want an oversized or undersized AC.