Most Energy Efficient Window Air Conditioners Reviewed

Tony Case
Written by
Last update:

Window air conditioning units are a quick and easy way to cool down any room at no cost. They are a great temporary (or long-term) solution for cooling a room or a space.

However, buying the right one is pretty crucial. People who don’t assess the situation properly could end up with a unit that’s too small, too noisy, and doesn’t cool the air very effectively.

That’s why we made this guide. We wanted to create a resource for anyone interested in a window air conditioner. In this guide, you will learn everything you need to make a great choice.

NameCategoryProduct
AMANA 5,000 BTU 115V Window-Mounted Air ConditionerBest OverallAMANA 5,000 BTU 115V Window-Mounted Air Conditioner
AMANA 6,000 BTU 115V Window-Mounted Air ConditionerBudget PickAMANA 6,000 BTU 115V Window-Mounted Air Conditioner
Frigidaire 12000 Btu Cool Connect Smart Window Air Conditioner w/Wifi ControlUpgrade PickFrigidaire 12000 Btu Cool Connect Smart Window Air Conditioner w/Wifi Control

1. AMANA 5,000 BTU 115V Window-Mounted Air Conditioner

Our rating: 9 / 10

AMANA 5,000 BTU 115V Window-Mounted Air Conditioner

Check Price on Amazon

Pros:

  • Powerful
  • Durable
  • Intuitive setup
  • Great price
  • Makes little noise
  • No-frills design

Cons:

  • Deficiency in settings
  • Plastic

This efficient window mounted air conditioner is completely free of CFCs. It comes with an easy-to-clean filter to reduce allergens.

It can be used for rooms up to 300 sq. ft., a great choice for offices, bedrooms, kitchen, and living room cooling. It’s a favorite among reviewers as it’s very easy to install – you just need to install the casters and set the exhaust by drilling a small hole. It also comes with a mounting kit.

As far as price is concerned, the Amana 5,000 BTU 115V Window Mounted Air Conditioner is a pretty good value for money. It does not require a window to be drilled out and comes with six-way sliding casters that provide about 18 inches of mobility.

2. AMANA 6,000 BTU 115V Window-Mounted Air Conditioner

Our rating: 8 / 10

AMANA 6,000 BTU 115V Window-Mounted Air Conditioner

Check Price on Amazon

Pros:

  • Energy star certified
  • Removable air filter
  • Energy efficient
  • Easy installation
  • Remote controlled
  • Quiet

Cons:

  • No fan speeds
  • No timer
  • Cannot be used horizontally
  • You need to purchase separate hose for exhaust window

3. Friedrich Chill CP06G10B 6000 BTU Window Air Conditioner

Our rating: 8 / 10

Friedrich Chill CP06G10B 6000 BTU Window Air Conditioner

Check Price on Amazon

Pros:

  • Energy Star rated
  • Auto restart – useful in case of a power outage
  • Remote control with multiple features
  • Has a timer function

Cons:

  • Isn’t very portable
  • Won’t cool very large rooms
  • Seems like a long wait when it's first starting up

For a basic but complete window air conditioner, you can’t go wrong with the CP06G10B by Friedrich. It’s Energy Star rated, which mean that it’s both efficient and cost-effective to power, and at 6000 BTU, it will quickly cool a room up to 700 sq. ft. It comes with a remote, which is a great feature for a window AC. The unit itself weighs a bit over 50 pounds, which is quite heavy for a window air conditioner. In the window, it measures 27-inches wide x 26-inches long x 14-inches deep. It’s capable of cooling a room up to 24 hours per day, and can circulate air in 90 seconds.

4. LG LW8016ER 8,000 BTU 115V Window-Mounted Remote Control Air Conditioner

Our rating: 8 / 10

LG LW8016ER 8,000 BTU 115V Window-Mounted Remote Control Air Conditioner

Check Price on Amazon

LG LW8016ER is a great choice for your home and office. The air conditioner is designed to be energy efficient with two modes that you can use to control your energy use and your operation costs. With an energy Saver mode and Auto Restart, you can cut down on power use while still cooling your room. The Auto Restart mode will help you avoid losing the settings on your remote control.

The air conditioner can maintain an even temperature in your room thanks to the three cooling speeds and warm air discharge. The air filter helps to remove odors, dust and pollen from your air, resulting in better air quality.

The compact air conditioner will allow you to save space, even when you place it in a tight window. It is designed with a slim air discharge that will help you fit it in your window. You can safely use the LG LW8016ER without any worries since it is designed with advanced safety features.

5. Haier ESAQ406T 22" Window Air Conditioner Serenity Series

Our rating: 7 / 10

Haier ESAQ406T 22" Window Air Conditioner Serenity Series

Check Price on Amazon

We’re excited about the Haier ESAQ406T; this is Haier’s “best in class” serenity model, which is energy efficient, with longer lifespan. This model runs quietly and works at a low RPM, which means the compressor will last for a long time.

The ESAQ406T utilises Inverter Technology, which provides precise temperature control and adjusts the speed of the compressor to match the demand. The Inverter Technology function adjusts the temperature and reduces power to the compressor by more than 30%.

The remote control has a LED Backlight to make it easy to see and use at night. You can easily change settings on the remote, which allow you to make adjustments based on your preferred temperature range. This window AC can cool a room up to 150 square feet.

6. Frigidaire 12000 Btu Cool Connect Smart Window Air Conditioner w/Wifi Control

Our rating: 6 / 10

Frigidaire 12000 Btu Cool Connect Smart Window Air Conditioner w/Wifi Control

Check Price on Amazon

Pros:

  • Built-in WiFi
  • Nice and compact design
  • Consistent temperature control
  • Can adjust the timers remotely
  • Features a filter change light
  • Stylish design
  • Offers an energy check

Cons:

  • Doesn’t work with Alexa or Google Assistant
  • Doesn’t work with Apple HomeKit
  • Doesn’t support auto-schedule function
  • The installation process can be difficult
  • The app freezes periodically

We’ve long lauded Frigidaire’s air conditioners for multiple reasons. Usually, when it comes to AC units, we’ve dabbled with different brands – mainly because of the variations in prices. The Frigidaire Cool Connect may cost a bit extra, but the pros definitely outweigh the cost.

We love the concept of integrating a remote into the air conditioner. When you purchase an air conditioner, you’d probably want consistent temperature control that the thermostat you buy doesn’t really offer. The reason we recommend the Frigidaire Cool Connect is because it boasts a sleek, top-notch design that looks incredibly chic in any setting.

7. Danby Air Conditioner

Our rating: 5 / 10

Danby Air Conditioner

Check Price on Amazon

The Danby 8000 BTU is quite popular for its reasonable price. The price is not the only thing this window AC unit has going for it.

At a glance, one might think that this air conditioner would do well in small spaces like apartments. With a BTU rating of 8000, it seems like this would be able to cool a room fairly quickly. That’s an important consideration anyone looking for an energy efficient window AC unit should have, right?

8. ARCTIC Wind 2016 Energy Star 6,000 BTU Window Air Conditioner

Our rating: 5 / 10

ARCTIC Wind 2016 Energy Star 6,000 BTU Window Air Conditioner

Check Price on Amazon

We were dead set on finding the best budget air conditioner, and the ARCTIC Wind Energy Star 6,000 BTU unit was quite promising. This unit promised to cool a room up to 500 sq. feet. It’s Energy Star certified, is constructed from quality materials, and was quite inexpensive compared to other brands’ units.

The ARCTIC has a tankless condensate system for maximum energy savings. Its auto restart feature will automatically turn the unit back on if there is a power outage in the house. The air conditioner is even compatible with smartphone tech, including Apple HomeKit and the Samsung SmartThings.

The ARCTIC unit displays several information about your cooling, including the current temperature, the current fan speed, the current timer settings, and the help guide. The control panel is even large enough to be seen from a distance. Reviewers confirm that this unit is as easy as it gets, and that there are no hassles using it.

Frequently Asked Questions (FAQ)

What is the most energy efficient window air conditioner?

Most energy efficient window air conditioners don’t have an Energy Saver Mode. Energy Star rated models save on average of 20%. Energy Star’s definition of the most efficient window air conditioners is the ones that can stay on for at least 10 hours on a medium speed and still hold the Energy Star rating.

What is the best brand for window air conditioners?

Hitachi, Mitsubishi, LG, and Amana are easily among the best air conditioning brands available today. I’ve heard great things about some of their window units. For example, the Hitachi RF-18KUHP Ventilation System 1.5 Ton Split Air Conditioner has excellent reviews. It is one of the best selling 1.5 ton window air conditioners on the market today.

Is it more energy efficient to leave window AC on?

Yes and no. Generally speaking, it’s more energy efficient to turn off your window AC at night and then turn it on the next morning than to leave it on through the night. This is because most window AC units don’t get your home’s temperature down to the desired level within one cycle. Turning off your AC and restarting it the next day, on the other hand, will help you save more energy.

If you do this, however, be sure to check the windows to make sure you haven’t left any open. You don’t want any part of your home to get too hot because of your AC.

Conclusion

An air conditioner is a good choice to keep your energy bills low while offering you reasonable comfort levels by automatically cooling indoor spaces. Being a very useful piece of home equipment, it’s important to choose a good one that has been energy star certified.

Our Recommendation

NameCategoryProduct
AMANA 5,000 BTU 115V Window-Mounted Air ConditionerBest OverallAMANA 5,000 BTU 115V Window-Mounted Air Conditioner
AMANA 6,000 BTU 115V Window-Mounted Air ConditionerBudget PickAMANA 6,000 BTU 115V Window-Mounted Air Conditioner
Frigidaire 12000 Btu Cool Connect Smart Window Air Conditioner w/Wifi ControlUpgrade PickFrigidaire 12000 Btu Cool Connect Smart Window Air Conditioner w/Wifi Control