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most efficient window air conditioners

Best Buy customers often prefer the following products when searching for Most Efficient Window Air Conditioners.

Browse the top-ranked list of Most Efficient Window Air Conditioners below along with associated reviews and opinions.

Browse the top-ranked list of Most Efficient Window Air Conditioners below along with associated reviews and opinions.

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  1. Top comment

    "Love it...Good Ac...I had first purchased a similar 8000 BTU from Home Depot because I couldn't find it on the Best Buy site (they list it within the square footage of the room, but not the BTUs)....We installed one in the middle of the first floor and one in our bedroom upstairs, with a box fan on each floor to help circulation."

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    Product Description

    Make your home more comfortable with this 8000 BTU Frigidaire window air conditioner. Its three fan speeds and energy saver mode let you customize your cooling, while its remote control provides convenient access to temperature settings. This Frigidaire window air conditioner includes SpaceWise side panels that adjust to fit your window size.
    $239.99
    Top comment

    "Love it...Good Ac...I had first purchased a similar 8000 BTU from Home Depot because I couldn't find it on the Best Buy site (they list it within the square footage of the room, but not the BTUs)....We installed one in the middle of the first floor and one in our bedroom upstairs, with a box fan on each floor to help circulation."

    ""

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    Product Description

    Make your home more comfortable with this 8000 BTU Frigidaire window air conditioner. Its three fan speeds and energy saver mode let you customize your cooling, while its remote control provides convenient access to temperature settings. This Frigidaire window air conditioner includes SpaceWise side panels that adjust to fit your window size.
  2. Top comment

    "Love it...Good ac...It's really a good ac it's very cold in my room and I love that it has a remote....I had my worries since I bought it open-boxed but it work just fine and brings my room to 60 degrees in minutes."

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    Product Description

    Lower the temperature of a small 150 sq. ft. room during summer months with this 5000 BTU Frigidaire air conditioner. Its remote control lets you adjust the thermostat and fan speeds from a distance, and its antibacterial mesh filter traps particulates. This Frigidaire air conditioner dehumidifies up to 1.6 pints per hour to keep the air feeling dry.
    $169.99
    Top comment

    "Love it...Good ac...It's really a good ac it's very cold in my room and I love that it has a remote....I had my worries since I bought it open-boxed but it work just fine and brings my room to 60 degrees in minutes."

    ""

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    Product Description

    Lower the temperature of a small 150 sq. ft. room during summer months with this 5000 BTU Frigidaire air conditioner. Its remote control lets you adjust the thermostat and fan speeds from a distance, and its antibacterial mesh filter traps particulates. This Frigidaire air conditioner dehumidifies up to 1.6 pints per hour to keep the air feeling dry.
  3. Top comment

    "Cool AC...Love it...Sometimes on the high setting it is a little noisier than I would like it but it is what it is....I purchased this window unit for an upstairs bedroom that is difficult to keep cool in a very old house... This unit's quiet and has a great modern look but most important it's extremely energy efficient!"

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    Product Description

    Install this 8000 BTU Frigidaire smart room air conditioner to keep the heat at bay. Its Cool Connect function is compatible with Amazon Alexa and Google Assistant, so you can turn it on and off or adjust the temperature using only your smartphone or tablet. This Frigidaire smart room air conditioner has LED lighting that creates a sleek look.
    $329.99
    Top comment

    "Cool AC...Love it...Sometimes on the high setting it is a little noisier than I would like it but it is what it is....I purchased this window unit for an upstairs bedroom that is difficult to keep cool in a very old house... This unit's quiet and has a great modern look but most important it's extremely energy efficient!"

    ""

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    Product Description

    Install this 8000 BTU Frigidaire smart room air conditioner to keep the heat at bay. Its Cool Connect function is compatible with Amazon Alexa and Google Assistant, so you can turn it on and off or adjust the temperature using only your smartphone or tablet. This Frigidaire smart room air conditioner has LED lighting that creates a sleek look.
  4. Top comment

    "not bad...Good AC...Quiet, and because it is not electronic it works on the switch in the wall...set it in a high space through the wall and forget setting it again....I do a happy dance every time I turn it on because I'm so thrilled that I CAN!"

    ""

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    Product Description

    Keep your space comfortable with this Frigidaire air conditioner. Its efficient temperature control reliably maintains a preset room temperature, and the SpaceWise adjustable side panels modify its 16-inch profile to best fit your windows. This Frigidaire air conditioner's antibacterial filter minimizes room odor and airborne particles for better air quality.
    $139.99
    Save $10
    Was $149.99
    Top comment

    "not bad...Good AC...Quiet, and because it is not electronic it works on the switch in the wall...set it in a high space through the wall and forget setting it again....I do a happy dance every time I turn it on because I'm so thrilled that I CAN!"

    ""

    Hear more from customers

    Product Description

    Keep your space comfortable with this Frigidaire air conditioner. Its efficient temperature control reliably maintains a preset room temperature, and the SpaceWise adjustable side panels modify its 16-inch profile to best fit your windows. This Frigidaire air conditioner's antibacterial filter minimizes room odor and airborne particles for better air quality.
  5. Top comment

    "Good AC...Nice AC...It has been over 110 degrees F for a week and this little AC worked great....I was pleasantly surprised that this air conditioner went above and beyond my expectations."

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    Product Description

    Keep your home cool and comfortable with this Frigidaire window-mounted air conditioner. Providing 6000 BTUs, it's strong enough to chill a room that measures 250 square feet. Its antibacterial mesh filter keeps the air you breathe fresh and clean. Cool off on a hot day with this Frigidaire window-mounted air conditioner.
    $199.99
    Save $30
    Was $229.99
    Top comment

    "Good AC...Nice AC...It has been over 110 degrees F for a week and this little AC worked great....I was pleasantly surprised that this air conditioner went above and beyond my expectations."

    ""

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    Product Description

    Keep your home cool and comfortable with this Frigidaire window-mounted air conditioner. Providing 6000 BTUs, it's strong enough to chill a room that measures 250 square feet. Its antibacterial mesh filter keeps the air you breathe fresh and clean. Cool off on a hot day with this Frigidaire window-mounted air conditioner.
  6. Top comment

    "Good AC...Love it...This is the best Air Conditloner I ever own I like the app I can turn the air on when I leave work and the house is cool when I get home...I love my new smart air conditioner it works perfect and I can turn it on from work with my phone"

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    Product Description

    Maintain a comfortable indoor environment with this compact 12000 BTU Frigidaire air conditioner. Energy saver and sleep modes conserve electricity, while the remote control provides for easy operation from across the room. This 1000W Frigidaire air conditioner cools a 550 sq. ft. area, so it's good for a bedroom or small office.
    $469.99
    Top comment

    "Good AC...Love it...This is the best Air Conditloner I ever own I like the app I can turn the air on when I leave work and the house is cool when I get home...I love my new smart air conditioner it works perfect and I can turn it on from work with my phone"

    ""

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    Product Description

    Maintain a comfortable indoor environment with this compact 12000 BTU Frigidaire air conditioner. Energy saver and sleep modes conserve electricity, while the remote control provides for easy operation from across the room. This 1000W Frigidaire air conditioner cools a 550 sq. ft. area, so it's good for a bedroom or small office.
  7. Top comment

    "Good AC...Great AC...This was a great buy for this size window unit.It works great and cools very well.We purchased this as an extra one and we got a great deal on it....I bought it late in the season so this wasn't available for display in the store, but was able to buy from the BestBuy website and picked up in store right away."

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    Product Description

    With 3 fan speeds and 3 cool settings, this Frigidaire FFRA0811R1 air conditioner helps you maintain a comfortable temperature in your bedroom throughout the summer. An antibacterial filter eliminates dust and odors for fresh, clean air.
    $219.99
    Save $50
    Was $269.99
    Top comment

    "Good AC...Great AC...This was a great buy for this size window unit.It works great and cools very well.We purchased this as an extra one and we got a great deal on it....I bought it late in the season so this wasn't available for display in the store, but was able to buy from the BestBuy website and picked up in store right away."

    ""

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    Product Description

    With 3 fan speeds and 3 cool settings, this Frigidaire FFRA0811R1 air conditioner helps you maintain a comfortable temperature in your bedroom throughout the summer. An antibacterial filter eliminates dust and odors for fresh, clean air.
  8. Top comment

    "Good Buy...Great AC...It arrived and looked great in window but after 1 day it started to hum and had it checked and a bearing was going out....I have crank window...unable to install in window, good news, with a little brain use and imagination it works....."

    ""

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    Product Description

    Create comfort in rooms up to 550 square feet with this Frigidaire air conditioner. Eight-direction air distribution ensures even cooling throughout the room. A remote lets you control temperature and fan speed from wherever you are in the room. An antibacterial filter helps this Frigidaire air conditioner reduce bacteria and odors in your space.
    $329.99
    Save $40
    Was $369.99
    Top comment

    "Good Buy...Great AC...It arrived and looked great in window but after 1 day it started to hum and had it checked and a bearing was going out....I have crank window...unable to install in window, good news, with a little brain use and imagination it works....."

    ""

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    Product Description

    Create comfort in rooms up to 550 square feet with this Frigidaire air conditioner. Eight-direction air distribution ensures even cooling throughout the room. A remote lets you control temperature and fan speed from wherever you are in the room. An antibacterial filter helps this Frigidaire air conditioner reduce bacteria and odors in your space.
  9. Top comment

    "Good ac...Great AC...I installed this a/c in a 2200 square foot shop and it cools it right down nice and quick....It's working great and it's an energy saver unit so I can leave it on and it comes on only when necessary."

    ""

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    Product Description

    Cool off during those sweltering summer heat waves with this Frigidaire window-mounted air conditioner. This room air conditioning unit measures just under 19 inches high by 26.5 inches wide and fits windows between 31 and 42 inches wide. This Frigidaire window-mounted air conditioner provides low noise levels and uses three different directional fan speeds.
    $669.99
    Top comment

    "Good ac...Great AC...I installed this a/c in a 2200 square foot shop and it cools it right down nice and quick....It's working great and it's an energy saver unit so I can leave it on and it comes on only when necessary."

    ""

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    Product Description

    Cool off during those sweltering summer heat waves with this Frigidaire window-mounted air conditioner. This room air conditioning unit measures just under 19 inches high by 26.5 inches wide and fits windows between 31 and 42 inches wide. This Frigidaire window-mounted air conditioner provides low noise levels and uses three different directional fan speeds.
  10. Top comment

    "Great Buy!...Cools Good...Highly recommended when a casement window air conditioner is needed....Installation could be done by one person, but a second helping hand would make it easier."

    ""

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    Product Description

    Keep indoor environments comfortable with this 10,000 BTU Frigidaire air conditioner. Its 24-hour preset timer lets you program operational periods to match your schedule, and its quick mode temporarily speeds up the fan for fast cooling or warming action. This casement window Frigidaire air conditioner has an antibacterial filter to reduce air pollutants.
    $559.99
    Top comment

    "Great Buy!...Cools Good...Highly recommended when a casement window air conditioner is needed....Installation could be done by one person, but a second helping hand would make it easier."

    ""

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    Product Description

    Keep indoor environments comfortable with this 10,000 BTU Frigidaire air conditioner. Its 24-hour preset timer lets you program operational periods to match your schedule, and its quick mode temporarily speeds up the fan for fast cooling or warming action. This casement window Frigidaire air conditioner has an antibacterial filter to reduce air pollutants.
  11. Top comment

    "Good unit....Great item...Perfect window air conditioner for a medium room...It is very quiet for what it is and the light bill appears to show a drop."

    ""

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    Product Description

    Blast cool air throughout your home with this 18,000 BTU Frigidaire window-mounted air conditioner. Keep control of its operation with the easy-to-use control panel on the front of the unit, or use the handy remote control to power it off or change the temperature from a distance. Stay cool all summer long with this incredibly functional Frigidaire window-mounted air conditioner.
    $499.99
    Save $100
    Was $599.99
    Top comment

    "Good unit....Great item...Perfect window air conditioner for a medium room...It is very quiet for what it is and the light bill appears to show a drop."

    ""

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    Product Description

    Blast cool air throughout your home with this 18,000 BTU Frigidaire window-mounted air conditioner. Keep control of its operation with the easy-to-use control panel on the front of the unit, or use the handy remote control to power it off or change the temperature from a distance. Stay cool all summer long with this incredibly functional Frigidaire window-mounted air conditioner.
  12. Top comment

    "Love it...Very cool now....The A/C works flawlessly and I really like being able to program it to turn on in the afternoon while I am at work so I can come home to a cool house and not have to leave it running all day....Easy to install and fits in most window sizes."

    ""

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    Product Description

    Beat the summer heat with this Frigidaire air conditioner, which packs 8,000 BTUs of cooling power. The energy-saver mode cuts costs on utility bills, and its programmable timer can be set to turn the unit on and off automatically. Adjustable side panels let this Frigidaire air conditioner fit in casement or slider windows.
    $449.99
    Save $50
    Was $499.99
    Top comment

    "Love it...Very cool now....The A/C works flawlessly and I really like being able to program it to turn on in the afternoon while I am at work so I can come home to a cool house and not have to leave it running all day....Easy to install and fits in most window sizes."

    ""

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    Product Description

    Beat the summer heat with this Frigidaire air conditioner, which packs 8,000 BTUs of cooling power. The energy-saver mode cuts costs on utility bills, and its programmable timer can be set to turn the unit on and off automatically. Adjustable side panels let this Frigidaire air conditioner fit in casement or slider windows.
  13. Top comment

    "Great ac...Good A/C...I live on the fifth floor so it is important that I get a good air-conditioner....I like it"

    ""

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    Product Description

    Keep your home cool with this LG window air conditioner. Its Wi-Fi connectivity lets you monitor and adjust it remotely, while its alarm function lets you know when it's time to clean the filter. The four-way air deflection on this 12,000 BTU LG window air conditioner uniformly distributes air throughout the room.
    $359.99
    Save $10
    Was $369.99
    Top comment

    "Great ac...Good A/C...I live on the fifth floor so it is important that I get a good air-conditioner....I like it"

    ""

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    Product Description

    Keep your home cool with this LG window air conditioner. Its Wi-Fi connectivity lets you monitor and adjust it remotely, while its alarm function lets you know when it's time to clean the filter. The four-way air deflection on this 12,000 BTU LG window air conditioner uniformly distributes air throughout the room.
  14. Product Description

    With 3 fan speeds and 4 modes, this SPT WA-1222S window air conditioner offers customization to keep your home cool. The 12,000 BTU, 450-550 sq. ft. cooling capacity ensures efficient, powerful operation and electronic controls make navigation easy.
    $294.99

    Product Description

    With 3 fan speeds and 4 modes, this SPT WA-1222S window air conditioner offers customization to keep your home cool. The 12,000 BTU, 450-550 sq. ft. cooling capacity ensures efficient, powerful operation and electronic controls make navigation easy.
  15. Product Description

    Chill out with this Frigidaire Home Comfort FFRA2822R2 window air conditioner, which features an easy-to-use digital control and an antibacterial filter to help keep the air bacteria- and odor-free. The included window kit helps make installation simple.
    $699.99
    Save $170
    Was $869.99

    Product Description

    Chill out with this Frigidaire Home Comfort FFRA2822R2 window air conditioner, which features an easy-to-use digital control and an antibacterial filter to help keep the air bacteria- and odor-free. The included window kit helps make installation simple.