Indoor air conditioning is one of the best ways to beat the summer heat. For many, the convenience of central air remains out of reach, which leaves the window AC unit as the next best thing.
Today’s window air conditioners are much better than what you might be used to, and nothing like the massive energy hogs they once were. Modern window units provide relief from searing temperatures, remove humidity and use less electricity than ever before
However, if you don’t do your homework, it’s easy to end up with the wrong machine. You might get stuck with something too big, too small or that simply doesn’t fit where you want.
What Size Air Conditioner Do You Need?
The Rules for Keeping Cool
Window air conditioners typically have a cooling capacity ranging from 5,000 to 12,500 British thermal units (Btu/hr.). As a rule of thumb, an air conditioner needs 20 Btu for each square foot of living space.
But other considerations, such as the ceiling height and the size of your windows and doorways, might call for more cooling power.
To measure your room, multiply the length by the width. Add together the size of rooms that aren’t separated by doors, because the air conditioner will need to cool both spaces. Energy Star recommends that you make adjustments for the following circumstances:
• If the room is heavily shaded, reduce capacity by 10 percent.
• If the room is very sunny, increase capacity by 10 percent.
• If more than two people regularly occupy the room, add 600 Btu for each additional person.
• If the unit is used in a kitchen, increase capacity by 4,000 Btu.
Showing 1–48 of 53 results
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Frigidaire FFRE153WAE Window-Mounted Room Air Conditioner, 15,100 BTU with Energy Star Certified, Multi-Speed Fan, Sleep Mode, Programmable Timer, Easy-to-Clean Washable Filter, in White
$539.00 Learn More -
GE AHY08LZ Window Air Conditioner Complete with WiFi & Smart Home Connectivity | Energy Star Certified | Cools up to 350 Square Feet | 115 Volts | White
$365.99 Learn More -
TOSOT 8,000 BTU Window Air Conditioner with Remote Control, Cools Rooms Up to 350 Sq Ft
$299.99 Learn More -
Frigidaire FFRE103WAE Window Air Conditioner, 10,000 BTU, White
$726.33 Learn More -
Midea 10,000 BTU EasyCool Window Air Conditioner, Dehumidifier and Fan – Cool, Circulate and Dehumidify up to 450 Sq. Ft., Reusable Filter, Remote Control
$399.99 Learn More -
Friedrich SM18N30D Commercial Kuhl Window/Wall Air Conditioner 9.8 EER, 20000BTU
$1,846.51 Learn More -
Friedrich WallMaster Wall AC w/Elec. Heat, 12000 BTU Cool, 11000 BTU Heat, 230V, WET12A33A
$1,400.88 Learn More -
Windmill – The Windmill AC Modern Air Conditioner – Easy Install – Includes User Friendly App – Ultra-Quiet and Voice-Enabled 8000 BTU Window Air Conditioner
$349.00 Learn More -
Amana Energy Star 18,000 BTU 230V Window-Mounted Air Conditioner with Remote Control (AMAP182BW)
$725.07 Learn More -
LG 12,000 BTU Smart Window Air Conditioner, Cools up to 550 Sq. Ft., Smartphone and Voice Control works with LG ThinQ, Amazon Alexa and Hey Google, 3 Cool & Fan Speeds, 115V
$539.95 Learn More -
ROVSUN Smart 8000 BTU Window Air Conditioner, Energy Saving AC Unit with Remote & App Control & Timer Function Ideal for Rooms up to 350 Square Feet, 115V/60Hz, White
$239.99 Learn More -
12,000 BTU – ENERGY STAR – 230 volt/208 volt – 10.9 EER Kuhl+ Series Room Air Conditioner with Reverse Cycle Heat Pump
$1,854.98 Learn More -
Friedrich CEW24B33A Chill Premier Smart Air Conditioner Window Unit, WiFi Mobile Control, White, Heating & Cooling Capacity (24000 BTU)
$1,681.30 Learn More -
Midea 8,000 BTU U-Shaped Smart Inverter Air Conditioner âCools up to 350 Sq. Ft., Ultra Quiet with Open Window Flexibility, Works with Alexa/Google Assistant, 35% Energy Savings, Remote Control
$297.00 Learn More -
SereneLife Small Air Conditioner Portable 10,000 BTU with Built-in Dehumidifier – Portable AC unit for rooms up to 450 sq ft – Remote Control, Window Mount Exhaust Kit
$369.99 Learn More -
Frigidaire FFRE123WAE Window Air Conditioner, 12000 BTU
$589.00 Learn More -
Haier ESAQ406T Serenity Series 6, 000 BTU 115V Window Air Conditioner with Ultra Quiet Sound Package
$349.00 Learn More -
Danby DAC080EB6WDB 8,000 Window Air Conditioner, Programmable Timer, LED Display and Remote Control, Ideal for Rooms Up To 350 Square Feet, In White, 8000 BTU
$319.99 Learn More -
Friedrich ES12N33B 12,000 BTU – 230 volt/208 Volt – 11.3 EER Kuhl+ Series Room Air Conditioner with Electric Heat
$1,989.83 Learn More -
Friedrich CCW18B30A Chill Premier Smart Air Conditioner Wall & Window Unit, WiFi Mobile Control, White, Cooling Capacity (18,000 BTU)
$879.00 Learn More -
GE AHV05LZ Window Air Conditioner with 5050 BTU Cooling Capacity, 115 Volts in White OPEN BOX
$195.47 Learn More -
GE Profile Ultra Quiet Window Air Conditioner 6,200 BTU, WiFi Enabled, Ideal for Small Rooms, Easy Installation with Included Kit, 6K Window AC Unit, White
$349.00 Learn More -
Amana 15,000 BTU 115V Digital Window-Mounted Air Conditioner and Dehumidifier with Remote Control for Large Rooms up to 700 Sq.Ft, AC Window Unit for Home, Living Room, Bedroom with Fan Only Mode
$1,079.00 Learn More -
GE Profile Ultra Quiet Window Air Conditioner 8,200 BTU, WiFi Enabled, Ideal for Medium Rooms, Easy Installation with Included Kit, 8K Window AC Unit, White
$344.99 Learn More -
11,900 BTU – ENERGY STAR – 115 volt – 12.2 EER Kuhl Series Room Air Conditioner
$1,813.07 Learn More -
Midea 12,000 BTU EasyCool Window Air Conditioner, Dehumidifier and Fan – Cool, Circulate and Dehumidify up to 550 Sq. Ft., Reusable Filter, Remote Control
$449.00 Learn More -
Personal Air Cooler,Rechargeable Battery Operated 60°&120° Auto Oscillation,Portable Air Conditioner Fan with 3 Wind Speeds & 3 Refrigeration,Ultra Quite Ice Cooler Fan for Home Bedroom Office Outdoor
$29.99 Learn More -
TECCPO Portable Air Conditioner TAK04C, 8000 BTU Portable AC for Rooms up to 200 Sq.Ft, 3-in-1 with Remote Control
$299.97 Learn More -
Midea 8,000 BTU EasyCool Window Air Conditioner, Dehumidifier and Fan – Cool, Circulate and Dehumidify up to 350 Sq. Ft., Reusable Filter, Remote Control
$339.00 Learn More -
LG 10,000 BTU Window Air Conditioner, 115V, Cools 450 Sq.Ft. for Bedroom, Living Room, Apartment, Quiet Operation, Electronic Control with Remote, 3 Cooling & Fan Speeds, Auto Restart, White
$379.99 Learn More -
Koldfront WAC12003WCO 12000 BTU 115V Window Air Conditioner with Dehumidifier and Remote Control
$440.00 Learn More -
13,700 BTU – ENERGY STAR – 115 volt – 12.2 EER Kuhl Series Room Air Conditioner
$1,499.00 Learn More -
Senville LETO Series Mini Split Air Conditioner Heat Pump, 9000 BTU 110/120V, Inverter, Works with Alexa, SEER2 21.5, White
$699.99 Learn More -
Amana AMAP101BW 10,000 BTU 115V Digital Mounted Air Conditioner and Dehumidifier with Remote Control for Small-Medium 450 Sq.Ft, AC Window Unit for Living Room, Bedroom with Fan Only Mode, White
$594.00 Learn More -
Amazon Basics Window-Mounted Air Conditioner with Remote – Cools 450 Square Feet, 10000 BTU, Energy Star
$351.99 Learn More -
LG AC 12,000 Window Air Conditioner, 115V, 550 Sq.Ft. for Bedroom, Living Room, Apartment, Quiet Operation, Electronic Control with Remote, 3 Cooling & Fan Speeds, Auto Restart, White, 12000 BTU
$479.93 Learn More -
LG 6,000 BTU Window Air Conditioner, 115V, Cools 250 Sq.Ft. for Bedroom, Den, Living Room, Quiet Operation, with Remote, 2 Cooling & Fan Speeds, 2-Way Air Deflection, Auto Restart, White
$269.95 Learn More -
Friedrich SM21N30E Commercial Kuhl Window/Wall Air Conditioner 9.8 EER, 20500 BTU
$2,894.62 Learn More -
Friedrich PDE09K3SG
$1,532.42 Learn More -
Midea 5,000 BTU EasyCool Small Window Air Conditioner – Cool up to 150 Sq. Ft. with Easy-to-Use Mechanical Controls and Reusable Filter, Perfect for Small Bedroom, Living Room, Home Office
$169.99 Learn More -
BLACK+DECKER 10,000 BTU Portable Air Conditioner up to 450 Sq.Ft. with Remote Control,White
$329.99 Learn More -
GE Electronic Window Air Conditioner 6000 BTU, Efficient Cooling for Smaller Areas Like Bedrooms and Guest Rooms, 6K BTU Window AC Unit with Easy Install Kit, White
$225.49 Learn More -
Frigidaire FFRE083WA1 Window-Mounted Room Air Conditioner, 8,000 BTU, White
$265.00 Learn More -
Keystone 5,000 BTU Window Air Conditioner and Dehumidifier, Window AC Units for Apartment, Living Room, Bathroom, and Small Rooms up to 150 Sq.Ft., Quiet Window Air Conditioners with Remote Control
$239.99 Learn More -
KCL36A30A 28″ Kuhl Smart Air Conditioner with Cooling 35000 BTU QuietMaster Technology Slide Out Chassis Wi-Fi and Remote Controller in White
$2,499.00 Learn More -
Friedrich PDH07K3SG 42″ Packaged Terminal Air Conditioner with 7200 BTU Cooling 6200 BTU Heating 13.0 EER 230/208 Volts DiamonBlue Advanced Corrosion Protection and Washable Air Filter in
$1,767.00 Learn More -
GE Window Air Conditioner 5000 BTU, Efficient Cooling For Smaller Areas Like Bedrooms And Guest Rooms, 5K BTU Window AC Unit With Easy Install Kit, White
$189.00 Learn More -
Frigidaire 10,000 BTU 115V Window-Mounted Compact Air Conditioner with Remote Control, White
$389.00 Learn More