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5 Best Energy Efficient Window Air Conditioners of 2025

Last Updated - 2025/07/16

1
Best Choice

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Danby

Danby DAC145EB6WDB-6 14,500 BTU Window AC in White with WIFI and Wireless Connect

Picked by 546 people in the last week

Danby

CA$739.99

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Main highlights
- Wireless Connect: Easily control your unit from anywhere with the wireless connect feature
- Sleep mode: Prevents the room from getting too cold while you sleep
- R32 Refrigerant: environmentally friendly, R32's GWP (Global Warming Potential) is 3x lower than R410a
- Powerful 3 speed fan circulates the air
- Follow Me Function: Remote control acts as a thermostat allowing for more precise temperature control
- Energy Saver Switch: cycles the fan on and off to reduce energy consumption
- Electronic controls with LED display and remote control
- Auto Restart: Unit automatically restarts after a power failure
- 4 way air direction
- 14,500 BTU cools space up to 700 square feet
CA$739.99
2

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

SIMOE

SIMOE Window Air Units 12,000 BTU, U-Shaped Window Air Conditioners, Cools up to 550 Sq. Ft, 42db Ultra Quiet, Easy Installation, Energy Savings, Remote Control, White

SIMOE

CA$619.99

More Details
Main highlights
- 🤍 【𝟮-𝗬𝗲𝗮𝗿 𝗖𝗼𝗺𝗽𝗿𝗲𝘀𝘀𝗼𝗿 & 𝟯-𝗬𝗲𝗮𝗿 𝗣𝗮𝗿𝘁𝘀 𝗪𝗮𝗿𝗿𝗮𝗻𝘁𝘆】Enjoy a 2-year compressor warranty and 3-year parts warranty, backed by responsive customer support for total peace of mind.
- 🛠 【𝗙𝗮𝘀𝘁 𝗦𝗲𝘁𝘂𝗽, 𝗔𝗻𝘁𝗶-𝗧𝗵𝗲𝗳𝘁 𝗣𝗿𝗼𝘁𝗲𝗰𝘁𝗶𝗼𝗻】Install in minutes with included screws—no tools or handyman required. Built-in anti-theft mechanism adds peace of mind.
- 🔌【𝗔𝘂𝘁𝗼 𝗥𝗲𝘀𝘁𝗮𝗿𝘁 𝗔𝗳𝘁𝗲𝗿 𝗣𝗼𝘄𝗲𝗿 𝗢𝘂𝘁𝗮𝗴𝗲𝘀】Remembers your last settings and resumes automatically after a power cut.
- 🔇 【𝗪𝗵𝗶𝘀𝗽𝗲𝗿-𝗤𝘂𝗶𝗲𝘁 𝗖𝗼𝗼𝗹𝗶𝗻𝗴 𝗬𝗼𝘂’𝗹𝗹 𝗟𝗼𝘃𝗲】Operates as quietly as 42 dB—ideal for bedrooms, nurseries, and quiet workspaces.
- 📏【𝗪𝗶𝗻𝗱𝗼𝘄 𝗦𝗶𝘇𝗲 𝗥𝗲𝗾𝘂𝗶𝗿𝗲𝗺𝗲𝗻𝘁𝘀】Fits windows 20–48" wide (max sill: 10.9”). AC unit size: 14.88"H x 18.7"W x 29.13"L. Please measure your window before purchase to ensure the perfect fit.
- 💡【𝗦𝗺𝗮𝗿𝘁 𝗘𝗻𝗲𝗿𝗴𝘆 𝗦𝗮𝘃𝗲𝗿 + 𝗪𝗮𝘀𝗵𝗮𝗯𝗹𝗲 𝗙𝗶𝗹𝘁𝗲𝗿】DOE-certified for energy efficiency. Washable filter with maintenance reminder.
- 🌤 【𝗨-𝗦𝗵𝗮𝗽𝗲𝗱 𝗗𝗲𝘀𝗶𝗴𝗻, 𝗟𝗶𝗴𝗵𝘁 & 𝗩𝗶𝗲𝘄 𝗨𝗻𝗯𝗹𝗼𝗰𝗸𝗲𝗱】Enjoy natural light and an unobstructed view thanks to the unique U-shaped design that sits below the window.
- ⚡ 【𝗘𝗻𝗲𝗿𝗴𝘆-𝗦𝗮𝘃𝗶𝗻𝗴 𝗦𝗺𝗮𝗿𝘁 𝗠𝗼𝗱𝗲𝘀】Switch between 6 modes including Cool/Dehumidify/Fan/Auto/Sleep/Energy Saver—year-round comfort with up to 30% energy savings.
CA$619.99
3

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Danby

Danby DAC100EB9WDB 10000 BTU Window AC in White

Danby

CA$308.99

CA$329.99
(6% Off)

More Details
Main highlights
- Sync the 24-hour timer with your schedule to save energy
- Sleep mode: Prevents the room from getting too cold while you sleep; Included components: installation kit, 2 aaa batteries, remote control, owners manual
- R32 Refrigerant: Environmentally friendly, R32 ‘s GWP (Global Warming Potential) is 3x lower than R410a
- Powerful 3 speed fan allows you to adjust for your comfort
- Follow Me Function: Remote control acts as a thermostat allowing for more precise temperature control
- Energy Saver Switch: cycles the fan on and off to reduce energy consumption
- Electronic controls with LED display and remote control
- Auto Restart: Unit automatically restarts after a power failure
- 4-way air direction
- 10,000 BTU’s cools space up to 450 square feet
CA$308.99
CA$329.99 (6% Off)
4

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

DORTALA

DORTALA Portable Air Conditioner 10000 BTU, 3-in-1 AC Cooling Unit with Dehumidifier, 24H Timer, Remote Control, Window Kit, Standing Air Conditioner for Home, Apartment, Dorm, Cools up to 350 Sq.Ft

DORTALA

CA$309.99

More Details
Main highlights
- USER-FRIENDLY OPERATION: Featuring dual control with an LED touch panel and a convenient remote, this portable AC offers ease of use. Choose between manual and continuous drainage modes, while the removable and washable filter simplifies maintenance.
- PORTABLE & EASY TO INSTALL: Effortlessly move the unit with 4 universal wheels and 2 recessed handles. With a window installation kit for windows of 25.5"-47" width/height, installation is simple with clear instructions included.
- EFFICIENT COOLING CAPACITY: The 10000 BTU power swiftly cools a room of up to 350 sq.ft, making it ideal for various spaces like the living room, bedroom, or office, providing quick relief on hot days.
- 3-IN-1 FUNCTIONALITY: This portable unit acts as a FAN, DEHUMIDIFIER, and AIR CONDITIONER, offering year-round comfort. Adjust temperature from 61℉ to 90℉, and easily control the louver within a 90° range.
- 24H TIMER & SLEEP MODE: Plan cooling with the 24H timer for energy efficiency. The smart sleep mode ensures a tranquil environment, gradually increasing the temperature by 1.8℉ per hour. Enjoy a peaceful night's rest with a noise level of ≤54dB.
CA$309.99
5
Best Value
17% Off

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

De'Longhi
17% Off

DeLonghi Portable Air Conditioner 14,000 BTU,cool extra large rooms up to 700 sqft,remote,energy saving mode,extremely quiet,dehumidifier,fan,programmable,window venting kit,AC Unit for room,EX390LVYN

De'Longhi

CA$577.49

CA$699.99
(17% Off)

More Details
Main highlights
- THE QUIETEST COOL. With all of this power, you might expect the noise to match—but the PAC EX390LVYN is equipped with Arctic Whisper Extreme Technology (quiet mode), meaning your comfort doesn’t have to cause a clamor. Operating at near-whisper levels, this portable AC unit cools and dehumidifies your room without disruption.
- TARGETED COOL DELIVERED RIGHT TO YOU. Cool Surround Technology uses Bluetooth technology to monitor temperature and humidity around the remote control and delivers targeted cool right to you
- PORTABLE COMFORT WITH EASY SETUP. Cast handles and wheels allow you to move the unit from room to room with ease while setup is simple and takes only minutes
- MULTIFUNCTIONAL FOR MAXIMUM COMFORT. 3-in-1 unit serves as an air conditioner, dehumidifier, or fan.
- EVEN, COOL AIRFLOW WITH PROGRAMMABLE TIMER. Motorized air direction control for custom comfort. Set the timer to turn on or off to match your scheduling needs and save energy.
- COOLS EXTRA LARGE ROOMS. Supplies 14000 (ASHRAE)/8600 (SACC) BTU cooling power where it is needed most.
- CLEANER AIR. The Washable Filter screens impurities from entering the unit and is simple and easy to clean under the faucet.
- BALANCE TEMPERATURE AND HUMIDITY. Industry exclusive ECO Real Feel technology provides an unmatched level of comfort, securing the ideal balance between temperature and humidity while saving up to 30% in energy consumption. With ECO Real Feel, the EX390LVYN monitors your surrounding climate to optimize comfort and efficiency. It cools and dries the air, turning any room into your ideal comfort zone
- 3-in-1 Unit Delivers a Precise, Targeted Cool
CA$577.49
CA$699.99 (17% Off)

5 Best Energy Efficient Window Air Conditioners of 2025

Danby DAC145EB6WDB-6 14,500 BTU Window AC in White with WIFI and Wireless Connect

SIMOE Window Air Units 12,000 BTU, U-Shaped Window Air Conditioners, Cools up to 550 Sq. Ft, 42db Ultra Quiet, Easy Installation, Energy Savings, Remote Control, White

Danby DAC100EB9WDB 10000 BTU Window AC in White

DORTALA Portable Air Conditioner 10000 BTU, 3-in-1 AC Cooling Unit with Dehumidifier, 24H Timer, Remote Control, Window Kit, Standing Air Conditioner for Home, Apartment, Dorm, Cools up to 350 Sq.Ft

DeLonghi Portable Air Conditioner 14,000 BTU,cool extra large rooms up to 700 sqft,remote,energy saving mode,extremely quiet,dehumidifier,fan,programmable,window venting kit,AC Unit for room,EX390LVYN

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