Best Energy Efficient Window Air Conditioner In September 2026

Facebook

Twitter

Tumblr

Pinterest

Reddit

WhatsApp

Telegram

Are you looking for the Top 10 Best Energy Efficient Window Air Conditioner? Well, just grab a cup of coffee and read on! We are huge fans of Best Energy Efficient Window Air Conditioner and have done our comprehensive research here.

To help you in your search, we have completed this list of the Best Energy Efficient Window Air Conditioner.

Top Rated Best Energy Efficient Window Air Conditioner Of 2026

Rank	Product Name	Score
1	Frigidaire 5,000 BTU 115V Window-Mounted Mini-Compact Air Conditioner with Mechanical Controls, White Buy Now	9.7 Buy Now
2	MIDEA EasyCool Window Air Conditioner - Cooling, Dehumidifier, Fan with remote control Buy Now	9.5 Buy Now
3	Frigidaire FFRE0533S1 5,000 BTU 115V Window-Mounted Mini-Compact Air Conditioner with Full-Function Remote Control Buy Now	9.1 Buy Now
4	Midea U Inverter Window Air Conditioner 8,000BTU, The First U-Shaped AC with Open Buy Now	8.8 Buy Now
5	LG LW6017R 6,000 BTU 115V Window Air Conditioner, White Buy Now	8.6 Buy Now
6	hOmeLabs 5000 BTU Window Mounted Air Conditioner - 7-Speed Window AC Unit Small Buy Now	8.3 Buy Now
7	Della 6000 BTU Window Air Conditioner 690W, 110V/60Hz, 12.2 (EER) Energy Star Efficient Buy Now	8.1 Buy Now
8	Frigidaire FFRE063ZA1 19" Energy Star Window Mounted Air Conditioner with 6000 BTU Cooling Buy Now	7.8 Buy Now
9	hOmeLabs 8,000 BTU Window Air Conditioner - Energy Star Certified AC Unit Buy Now	7.5 Buy Now
10	Keystone 5,000 BTU Window-Mounted Air Conditioner with Follow Me LCD Remote Control, White Buy Now	7.2 Buy Now

1. Frigidaire 5,000 BTU 115V Window-Mounted Mini-Compact Air Conditioner with Mechanical Controls,

• Quickly cools a room upto 150 square feet with dehumidification upto 1.1 pints per hour
• Low power start-up conserves energy and saves you money
• Quiet operation on low (51.3 dba) keeps you cool without keeping you awake
• Energy efficiency ratio (eer): 11.0
• 5,000 btu mini-compact air conditioner for window-mounted installation uses standard 115v electrical outlet

2. MIDEA EasyCool Window Air Conditioner - Cooling, Dehumidifier, Fan with remote control

• Performance & certifications: eer 12.2 btu/h/w | energy start certified* | power supply 115v
• For maximum comfort, use the sleep button. this mode automatically adjusts the temperature throughout the night to align with your bodys natural sleep cycle
• Your purchase includes one midea easycool window air conditioner of 5,000 btu, one remote control & user manual
• Dehumidifier dimensions: 15.98 w x 13.19 d x 12.05 h | window min/max opening width: 23 / 36 | window opening height: 13 | weight: 42.9 lbs
• The cleanfilter warning will always let you know when your unit needs maintenance, and with expandable panels to match several window types and sizes, set up and stowing are a piece of cake

3. Frigidaire FFRE0533S1 5,000 BTU 115V Window-Mounted Mini-Compact Air Conditioner with Full-Function

• Quickly cools a room up to 150 sq. ft, cabinet height: 12", cabinet depth (w/ front): 15-1/4", cabinet depth: 13"
• Window width: 23" - 36", window height: 13"
• 2016 energy star: 12.2 energy efficiency ratio (eer)
• Low power start-up and operation conserves energy and saves you money
• Safety certification: ul/cul (sa11087), energy star certified: yes, ul listed: yes
• 5,000 btu mini-compact air conditioner for window-mounted installation, dehumidification up to 1.1 pints per hour

4. Midea U Inverter Window Air Conditioner 8,000BTU, The First U-Shaped AC with Open

• More than 35% energy savings**: with the advanced dc inverter technology, midea u achieves over 35% energy savings compared to other traditional units, and it's the first window ac to obtain the energy star most efficient 2020 certification. you may also get exclusive benefits from your local energy distributor
• Extreme quiet: 9 times quieter than some traditional units*. the u-shape blocks the noise from the cooling system using your window. this design allows for extremely quiet operation as low as 42 dba - almost as quiet as a library so you can get a restful nights sleep or binge your favorite shows undisturbed
• Smart control: the midea u is wi-fi- enabled, it can be controlled from anywhere through the cloud using the mideaair app on ios or android. you can also use voice commands with alexa or google assistant if you prefer
• Robust installation: support bracket is included for a more robust installation that supports the unit with the window open or closed.
• Flexible window open: midea u-shaped design allows your window to open, bringing fresh air into your home anytime allowing you to maintain more of your view

5. LG LW6017R 6,000 BTU 115V Window Air Conditioner, White

• 3 cooling speeds/3 fan speeds plus auto cool for cooling flexibility
• Included components: air conditioner, remote control, installation kit, manual/installation instructions
• 6,000 btu air conditioner
• Cools a room upto 260 sq. ft. dehumidification upto 1.8 pints per hour
• Overall dimensions: 17.32" w x 14.37" d x 11.14" h | maximum window width: 36"

6. hOmeLabs 5000 BTU Window Mounted Air Conditioner - 7-Speed Window AC Unit Small

• Super fast cool time - quiet mini compact air conditioner features 7 temp settings for cooling flexibility, two-way air direction control and adjustable high or low fan speeds to quickly and powerfully reduce hot temperatures in small rooms in just 15 minutes or less
• Cold window ac for small hot room - heavy duty window-mounted air conditioner with 5000 btus of cooling power to chill indoor spaces up to 150 square feet, an essential summer addition to bedrooms, living rooms, dorm rooms or small apartments
• With air conditioner mounting kit - electric window ac system comes with filter, support brackets, leaf guards, window seal foam, and even a handy drip-free installation guide. be sure to plug the conveniently extra-long, 6 ft, 3-prong power cord directly into wall outlet (do not use with extension cords)
• Reusable filter - includes reusable washable filter that can be easily cleaned with warm water and dish soap, or vacuum cleaned with dustbuster (if hand washing, please allow to filter dry thoroughly before re-installing). clean filter regularly to enjoy optimum cooling power
• Best personal or rv air conditioner - 5000 btu energy efficient window ac unit for 110v/120v electrical outlets measures 16 inches long x 12 inches high x 15.4 inches deep. ideal for windows for windows measuring between 23 - 36 inches wide, and at least 13 inches high

7. Della 6000 BTU Window Air Conditioner 690W, 110V/60Hz, 12.2 (EER) Energy Star Efficient

• Coverage area - compact size measures at only 19"w x16"d x14"h and weight only 53 pounds, unit is able to cools up to 250 sq. ft space. great ideal for small rooms, storage rooms, computer server rooms, apartments, condos, trailer homes and more!
• Features - variable temperature setting from 61 - 88. all functions can be set on led digital display or remote control: sleep mode, fan speed selection, 24 hour timer, eco mode, auto mode, and fan only. washable and reusable air filter can be easily slide out and can be easily washed with warm water and dish soap or vacuum cleaner for best performance. please make su...
• Easy installation - unit installs easily without significant modification to the existing window frame. fits windows from 23" to 36" wide and minimum height of 14.5". complete mounting accessories are included in package. pilot holes are highly recommended for some window frames. please check instruction manaul for more detail.
• High performance - 6000 btu, 690w, 115v/60hz, lcdi power supply and energy star rated at 12.2 energy efficiency ratio (eer). makes it a high energy saving and efficient compact window ac. unit also works as a dehumidifier with a dehumification capacity of 46 pint per day.
• Quiet operation - smooth air flow - 180 m3/h (low), 210 m3/h (medium), and 240 m3/h (high) fan speed with only 51 db(a) low 53 db(a) medium, and 55 db(a) high speed, it's almost about the sound level of an average conversation between two person in a quiet room. very easy to operate, simply set it and forget it.

8. Frigidaire FFRE063ZA1 19" Energy Star Window Mounted Air Conditioner with 6000 BTU Cooling

9. hOmeLabs 8,000 BTU Window Air Conditioner - Energy Star Certified AC Unit

• Powerful cooling capacity - the homelabs 8,000 btu window ac is a powerful indoor air conditioner packed with multiple cooling functions: from cool, dry, fan, eco to sleep mode. this unit is a practical way to get fast and efficient air cooling for a single bedroom or small living room that is around 300-350 square feet without having to install a central air conditioni...
• Quick and easy installation - the package comes complete with mounting accessories that youll need for installing your newly purchased window ac. it is designed to fit in a standard double-hung window with a window width between 23 and 36 and must allow a minimum 14.5 of vertical clearance. see the manual for complete installation details
• Energy efficient room cooler - this 115v/60hz energy star certified ac with 661 watts boasts energy-saving features such as 24-hour timer, sleep mode and eco mode. this room air conditioner is also equipped with a reusable slide-out air filter that can be easily washed with warm water and dish soap. please make sure the filter is dry thoroughly before reinstalling
• Compact sized with low noise level - our indoor ac unit is made with a low noise technology from 55 - 59 db. this air conditioner with 18.6 x 15.6 x 13.3 inches measurement and 6.5 ft power cord can be installed easily without significant modification to your existing window frame
• Remote control and digital thermostat display - you can turn the power on and off, adjust the temperature, set a timer to automatically turn itself off or set select modes using the digital control panel. you can also operate this indoor air conditioner with just simple click using the full-featured easy-to-use remote control making it easier for you to control the appl...

10. Keystone 5,000 BTU Window-Mounted Air Conditioner with Follow Me LCD Remote Control, White

• 5, 000 btu air conditioner for window-mounted installation
• Electronic controls with led display allows you to easily select options with the touch of a button
• 6. 4-ft. lcdi power cord with nema 5-15p plug uses standard 115v electrical outlet
• Quiet operation for a good night's sleep (49 dba on low)
• Cools a room up to 150 sq. ft. with dehumidification up to 1. 3 pints per hour