Best Energy Efficient Window Air Conditioners (2025 Update)

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If you’re looking for a way to stay cool during the summer months without breaking the bank on your energy bills, an energy-efficient window air conditioner might be just what you need. However, with so many options on the market, it can be hard to know where to start. Before buying an energy-efficient window air conditioner, there are a few factors you should consider to ensure you make the best choice for your needs.

Firstly, it's essential to consider the size of the room, as the size of the air conditioner should be appropriate for the size of your room. Look for an air conditioner with a high SEER rating, as this indicates greater energy efficiency. Also, check its noise level and installation requirements, as quiet units and those with easy-to-follow instructions could make installation less stressful. Finally, some models may come with additional features such as remote control, adjustable air flow, and energy-saving modes.

Do you dread turning on your air conditioner as you know it will lead to sky-high energy bills? Are you wondering whether an energy-efficient window air conditioner is the right choice for your home this summer? Want to know which models are the best on the market? In this article, we'll explore everything you need to know about energy-efficient window air conditioners, including how to choose the right one for your room, and some top-rated models that will keep you cool all summer long without breaking the bank.

10 Best Energy Efficient Window Air Conditioners

# Product Image Product Name Product Notes Check Price
1
The product is ideal for cooling medium-sized rooms with energy-efficient technology and can be controlled by remote or smartphone.
2
Ideal for efficient cooling in smaller areas such as bedrooms and guest rooms equipped with an easy install kit.
3
It is an ideal low noise air conditioning unit with smart control, eco mode, LED control panel, remote control, and timer.
4
The product is ideal for cooling small rooms or spaces up to 250 square feet with energy efficiency.
5
Ideal for cooling small rooms up to 250 square feet with programmable timer, LED display, and remote control.
6
The window air conditioner is ideal for cooling rooms up to 150 square feet with its energy-saving mechanical controls.
7
The product is ideal for cooling small rooms and bedrooms, saving energy, and easy installation with included kit.
8
The product is ideal for cooling small to medium areas up to 250 sq. ft with a remote control and LED display.
9
This product is ideal for cooling rooms up to 550 square feet with its energy-efficient and easy-to-use features.
10
Ideal for cooling and dehumidifying small to medium-sized rooms up to 250 square feet.
The product is ideal for cooling medium-sized rooms with energy-efficient technology and can be controlled by remote or smartphone.
Ideal for efficient cooling in smaller areas such as bedrooms and guest rooms equipped with an easy install kit.
It is an ideal low noise air conditioning unit with smart control, eco mode, LED control panel, remote control, and timer.
The product is ideal for cooling small rooms or spaces up to 250 square feet with energy efficiency.
Ideal for cooling small rooms up to 250 square feet with programmable timer, LED display, and remote control.
The window air conditioner is ideal for cooling rooms up to 150 square feet with its energy-saving mechanical controls.
The product is ideal for cooling small rooms and bedrooms, saving energy, and easy installation with included kit.
The product is ideal for cooling small to medium areas up to 250 sq. ft with a remote control and LED display.
This product is ideal for cooling rooms up to 550 square feet with its energy-efficient and easy-to-use features.
Ideal for cooling and dehumidifying small to medium-sized rooms up to 250 square feet.

1. Smartcool Window Ac: Easy Install, Medium Rooms

The GE Energy Star 8000 BTU Smart Window Air Conditioner is the perfect solution for medium-sized rooms of up to 350 sq ft. With its efficient cooling capacity, this AC unit is designed to deliver maximum comfort to living rooms and family rooms. It is Energy Star-certified, ensuring lower energy use and utility bills.

The SmartHQ app integration allows for easy monitoring, scheduling, and control of the smart AC unit from any location. The device is compatible with Amazon Alexa and Google Assistant, making daily use more accessible and versatile. The AC unit comes equipped with a remote control that can also be used to control the device.

The Eco Mode feature of this AC unit automatically turns off the fan and compressor when the room reaches the desired temperature, saving energy and reducing utility bills. Additionally, this AC unit has three cooling modes and three fan speeds, providing flexible and optimal room temperature settings for maximum comfort.

Installation and cleaning of this AC unit are effortless. It has a fixed chassis and can be easily installed in a double-hung window with the included EZ Mount installation kit. The slide-out, washable filter makes cleaning a breeze, ensuring that the unit operates at its best when cleaned every 30 days.

2. Ge Chillmate 6k Window Ac: Efficient Cooling Anywhere.

The GE 6000 BTU Electronic Window Air Conditioner is a great option for those looking to cool smaller rooms up to 250 square feet. This AC unit is perfect for spaces like bedrooms, home offices, studio apartments, and guest rooms.

Designed for maximum comfort, this air conditioner is energy-efficient with three cooling modes and three fan speeds. The digital controls make it easy to adjust the temperature to your desired comfort level.

One of the standout features of this air conditioner is its low-noise operation. It operates quietly and is ideal for nighttime use in bedrooms. The sound levels range from 55 to 61 dbA depending on the setting.

Installation and cleaning of this air conditioner is a breeze. The fixed chassis design allows for easy installation in a double hung window (size: W 21.875 – 36 x H 13.375") with the included EZ Mount installation kit. The slide-out filter makes cleaning quick and easy, and it's recommended to clean it every 30 days to keep the unit running at its best.

3. Homelabs Smart Ac With Eco Mode And Timer

The Smart Control Air Conditioner is a window AC unit that is WiFi enabled, allowing for easy control through the hOmelabs app. With a cooling power of 6,000 BTU, this AC can cool areas up to 250 sq ft, making it a versatile addition to any space. The unit has dimensions of L 18.54 × D 15.55 × H 13.40 in and operates on 500 W of power.

This air conditioner is Energy Star certified, ensuring higher energy efficiency and offering better value than non-certified units. It is also CEC, DOE, and CSA certified. The Smart Control Air Conditioner offers a range of functionalities, including cooling through the COOL mode, reducing humidity through the DRY mode, and getting rid of stale air through the FAN mode. Other features include a 24-hour timer, Eco, Sleep, and Follow Me.

Installing the Smart Control Air Conditioner is a breeze and can be done in as little as 15 minutes. The manual provides clear and easy-to-follow instructions for successful installation, although having a second person to help is recommended.

One of the best features of this air conditioner is its low noise operation, with a noise level of only 52 to 56 dB. This ensures minimal disturbance while it cools your space, making it perfect for watching TV, reading, or sleeping.

The Smart Control Air Conditioner is also compatible with Alexa and Google Assistant, allowing for voice control and making it even more convenient to use. With its versatile functionalities, easy installation, and low noise operation, the Smart Control Air Conditioner is a great addition to any home or office.

4. Coolwave 6k Window Ac With Remote

Introducing the 6,000 BTU Small Window Air Conditioner Unit, the ultimate solution to keeping your home comfortably cool during the hot summer months. This superior window unit AC operates at four levels – auto, low, medium and high – ensuring optimal indoor relief regardless of the weather outside. With a full function remote control, digital display, and adjustable thermostat control, you can easily control your room’s temperature within the range of 62˚F~86˚F.

Ideal for bedrooms and other small rooms, this AC unit (18.54" x 15.75" x 13.39") offers consistent, quick, and highly effective cooling for rooms up to 250 square feet. Perfect for offices, playrooms, cabins, living rooms, and apartments, this Energy Star air conditioner can also operate in the form of a dehumidifier when in dry mode and includes a fan-only function. With a weight of 41.9 lbs, it fits snugly into windows with easy installation and mounting hardware.

Featuring auto modes and remote control, the simple remote control and digital LED display panel with 24-hour timer programming allow you to precisely control the air temperature no matter where you are. Sleep, Dry, and Fan Modes make this 6000 BTU window unit breeze.

Installation is a breeze with the top rail attachment using a screwdriver and following the directions to ensure the AC unit window fits through your double-hung window. Cleaning the window unit has never been easier with the removable, washable nylon filter. Just slide/lift out the filter when the automatic filter check light is active, rinse it thoroughly under running water, put it back, and enjoy clean, cool, and fresh air. The 70.8” power cord length ensures easy placement and flexibility.

This window AC unit uses R32 refrigerant (.22 ounces), which has zero impact on the ozone layer and improves energy efficiency by up to 10% compared to R-410A. Because R32 is more efficient than R-410A, less refrigerant is needed, increasing the life of the 6k BTU window air conditioner. Great for a cool day at home and great for the environment, this Energy Saver feature comes complete with timer/lock function and a 56-decibel sound rating.

5. Danby 6k Btu Window Ac With Timer & Remote.

Introducing the perfect solution for your room cooling needs – the 6,000 BTU window air conditioner. This unit is designed to quickly cool spaces up to 250 square feet while providing excellent cooling power.

The 3-speed fan and 4-way air direction feature ensure that the air circulates uniformly throughout the room, making it an ideal choice for any living space. The Follow Me function is a convenient feature that allows the remote control to act as a thermostat, enabling you to set the precise temperature for your room.

The programmable timer is a valuable feature, allowing you to set a 24-hour timer, so you can control when your air conditioner turns on and off. Additionally, the Comfort Sleep mode is another excellent feature that ensures your room doesn't get too cold while you're sleeping.

This window air conditioner has an elegant and modern look, thanks to its electronic controls with LED display. Additionally, the auto-restart feature ensures that the unit automatically restarts after a power failure, eliminating the need to manually reset the unit.

The reusable air filter is another value-added feature that saves you money and is environmentally friendly. You can wash and reuse the filter, reducing waste and saving you the cost of replacing it.

Lastly, the R32 refrigerant used in this air conditioner has a GWP (Global Warming Potential) that is 3x lower than R410a, making it an eco-friendly choice for your home.

6. Rovsun Window Ac – 5000 Btu Coolness

The 5,000 BTU window-mounted air conditioner is a perfect cooling solution for compact rooms up to 150 square feet. It quickly cools down your home, office, or apartment, making it comfortable for you to relax or work during hot summer days.

Operating this air conditioner is a breeze with its easy-to-use knob. With 4 modes and 7 temperature options, it provides an easy and enjoyable cooling experience for people of all ages, including the elderly and children. You can adjust the temperature between 61℉ – 88℉ to suit your preference and room size.

This energy-saving AC operates at 115V/60Hz and features a high-quality compressor for efficient cooling and longer working life. Its eco-friendly design helps you save money on energy bills while reducing your carbon footprint.

Assembly is simple with the included side panels and installation parts, which save you a lot of time. A detailed instruction manual is also provided to help you assemble it in a short period. Please confirm your window size before making a purchase to ensure proper fit.

For added peace of mind, this air conditioner comes with a 1-year warranty. If you have any questions or concerns, please don't hesitate to contact the manufacturer for prompt and satisfactory service. Upgrade your living space with this efficient and user-friendly air conditioner today.

7. Ultra Quiet Window Ac – Haier 6k

The MAXIMUM COMFORT FOR SMALL ROOMS air conditioner is the perfect solution for those who want to enjoy a comfortable living space without sacrificing efficiency. With its three fan speeds and four cooling modes, this unit provides total flexibility and optimal home comfort. Additionally, the Eco Mode feature automatically turns off the fan and compressor, saving users money on utility bills.

One of the most notable features of this air conditioner is its ultra-quiet operation. With sounds as low as 42 dB, this unit provides maximum comfort with minimal noise. The quiet operation ensures that the air flows smoothly and quietly, without causing any disruption to the user's daily activities.

This air conditioner is best suited for rooms up to 250 square feet. Its 6200 BTU cooling capacity makes it the right size for small areas such as bedrooms, studio apartments, guest rooms, and home offices. Additionally, the unit is Energy Star-certified, which means it uses less energy and reduces utility bills.

The MAXIMUM COMFORT FOR SMALL ROOMS air conditioner is equipped with electronic controls and a remote, making it easy to program and adjust settings. Users can easily adjust the temperature and fan speed with simple digital controls, or use the included remote to adjust the unit from anywhere in the room.

Another noteworthy feature of this air conditioner is its 3-in-1 functionality. In addition to cooling the air, it includes a dehumidifying mode that balances humidity levels in the room. This feature helps to maintain user comfort and makes it easier to breathe.

8. Gree Coolmate: Smart Window Ac For Small Spaces

The Gree electronic 6,000 BTU window air conditioner is the perfect solution for those looking to cool and dehumidify their personal spaces. This powerful unit is designed to cool up to 250 sq. ft. while removing up to 1.6 pints of moisture from the air per hour, making it perfect for bedrooms, living rooms, apartments, and any other environment.

The Gree air conditioner offers a variety of settings and features to meet your individual needs. Its LED digital display and four modes (Cool, Energy Saver, Fan Only, and Dry) make it easy to customize your cooling experience. You can also choose from three different speeds, an Auto function, and a timer to further tailor your cooling preferences. Plus, the Intelligent Memory function remembers your last settings after power is lost and restored!

Installing the Gree air conditioner is a breeze thanks to its quick and effective window mounting kit, which is designed for double-pane windows. And when it comes time for maintenance, the washable mesh filter and Filter Check alert make it easy to keep your unit running efficiently.

One of the best things about the Gree air conditioner is its Energy Star rating. This means that it meets strict energy efficiency guidelines set by the US Environmental Protection Agency, helping you save money on your electric bill while keeping your space cool and comfortable.

9. 12k Energy Star Window Ac With Remote

The hOmeLabs 12,000 BTU window AC is the perfect solution for those in need of efficient and fast cooling in a single bedroom or small living room that measures approximately 450-550 square feet. With an array of cooling functions such as cool, dry, fan, ECO, and sleep mode, this indoor air conditioner is a practical and powerful option.

With the digital control panel, users can easily turn the power on and off, adjust the temperature, set a timer to automatically turn the unit off, or select from the various modes. Additionally, the full-featured remote control allows for easy operation of the appliance from anywhere in the room.

This Energy Star Certified AC unit operates on 115V/60Hz and 992 watts, offering energy-saving features such as a 24-hour timer, sleep mode, and ECO mode. The slide-out air filter is reusable and can be easily washed with warm water and dish soap. Ensure that the filter is thoroughly dry before reinstallation.

The hOmeLabs indoor AC unit is designed with low noise technology, producing only 55-59 dB of sound. Measuring 19.8 x 21.5 x 15.2 inches and with a 5.9 ft power cord, this air conditioner can be installed easily without significant modification to your existing window frame.

The package includes all mounting accessories required for installation. The unit is designed to fit in a standard double-hung window with a window width between 26” and 36” and must allow for a minimum of 16” of vertical clearance. Refer to the manual for complete installation details.

10. Freonic 6000: The Ultimate Room Cooler!

Introducing a powerful and sleek 6,000 BTU window-mounted air conditioner that will enhance the decor of any room in your home, be it traditional or contemporary. This AC unit has been certified with an impressive 12.1 Energy Efficient Ratio, ensuring it will save you money on your electricity bills. It's packed with the latest cooling technology, including Energy Saver and Sleep mode, making it an Energy Star certified product.

You won't have to wait long for this compact AC to cool down your living space. It operates quietly and efficiently, quickly bringing down the temperature in the room. With the ability to cool a space of up to 250 sq.ft., this unit is perfect for bedrooms, offices, apartments, and living rooms.

The installation kit included with the air conditioner contains everything you need to install the unit effectively in any window. From hardware to insulation and materials, you'll have everything you need for a smooth installation process.

This air conditioner also comes with special features that set it apart from other units. The Follow-Me remote control is a smart device that can sense the temperature of any room from any spot in the house. It automatically adjusts to your preferred comfort settings, ensuring you're always comfortable.

Best Energy Efficient Window Air Conditioners FAQs

Are there any additional features or technologies that can improve the energy efficiency of a window air conditioner?

Yes, there are additional features and technologies that can improve the energy efficiency of a window air conditioner. One such feature is an adjustable thermostat which allows you to set a preferred temperature and regulate the air conditioner's cooling output accordingly. This can help save energy by preventing the unit from running unnecessarily.

Another technology that can improve energy efficiency is the use of an inverter compressor. This type of compressor adjusts the speed of the compressor motor based on the cooling demand, which can help reduce energy consumption and save money on electricity bills.

A third feature that can improve energy efficiency is the use of a programmable timer. This allows you to set a schedule for when the air conditioner turns on and off, which can help you avoid using the unit when it's not necessary.

Lastly, proper maintenance such as regularly cleaning or replacing the air filter, ensuring the unit is properly sealed, and checking for leaks can also improve energy efficiency. By keeping the unit running smoothly, you can avoid unnecessary energy waste and ensure it operates at peak efficiency.

Are there any rebates or incentives available for purchasing an energy-efficient window air conditioner?

Yes, there are rebates and incentives available for purchasing an energy-efficient window air conditioner. Many utility companies offer rebates to their customers who purchase and install energy-efficient appliances, including window air conditioners. The rebates typically vary by location and can range from a few dollars to several hundred dollars.

In addition to utility company rebates, some state and federal programs offer incentives for energy-efficient upgrades. The U.S. Department of Energy's Energy Star program provides a list of energy-efficient air conditioners that may be eligible for rebates and incentives.

To take advantage of these rebates and incentives, it's important to research what programs are available in your area and what requirements must be met to qualify. Some programs may require that the air conditioner be Energy Star certified or that it meets certain energy efficiency standards.

Overall, investing in an energy-efficient window air conditioner can not only save you money on your energy bills but also provide you with opportunities to receive rebates and incentives to offset the initial cost.

Can an energy-efficient window air conditioner cool a large room effectively?

The effectiveness of an energy-efficient window air conditioner in cooling a large room depends on several factors. Firstly, the cooling capacity of the air conditioner should be appropriate for the size of the room. A higher cooling capacity is required for a larger room, and if the air conditioner's capacity is insufficient, it may struggle to cool the room effectively.

Secondly, the placement of the air conditioner is crucial. It should be installed in a location that allows for proper airflow and circulation throughout the room. If the air conditioner is obstructed by furniture or other objects, it may not be able to cool the room effectively.

Lastly, the insulation of the room also plays a role in the effectiveness of the air conditioner. If the room is poorly insulated, the cool air produced by the air conditioner may escape quickly, leading to inefficient cooling.

Therefore, while an energy-efficient window air conditioner can cool a large room effectively, it is essential to consider the cooling capacity of the unit, the placement of the air conditioner, and the insulation of the room to ensure optimal cooling performance.

Do energy-efficient window air conditioners require special installation or maintenance?

Energy-efficient window air conditioners do not require special installation or maintenance, but there are a few things to keep in mind. During installation, it is important to make sure that the air conditioner is properly sized for the room and that it is securely mounted in the window. This will help ensure that the unit operates efficiently and safely.

In terms of maintenance, regular cleaning of the air filter is essential to keep the unit running efficiently. This can be done by removing the filter and washing it with soap and water or vacuuming it. It is also important to clean the exterior of the unit periodically to remove any dirt or debris that may accumulate on the fins.

Additionally, energy-efficient air conditioners may have features such as programmable thermostats or electronic controls that can help optimize energy usage. Taking advantage of these features can help further reduce energy costs and improve the performance of the unit.

How do I choose the best energy-efficient window air conditioner for my home?

When choosing an energy-efficient window air conditioner for your home, there are a few factors to consider. First and foremost, you should look for a unit with a high Energy Efficiency Ratio (EER) rating. The EER rating measures the cooling capacity of the air conditioner in relation to the amount of energy it consumes. The higher the EER rating, the more energy-efficient the unit is, which means lower energy bills for you.

Additionally, you should consider the size of the unit in relation to the size of the room you want to cool. A unit that is too small won't effectively cool the room, while a unit that is too large will waste energy and money. To determine the appropriate size, measure the square footage of the room and consult the manufacturer's sizing chart.

You may also want to look for air conditioners with programmable thermostats, which can automatically adjust the temperature based on your schedule and preferences, further reducing energy usage.

Finally, consider the brand and model of the air conditioner. Look for reliable brands with good customer reviews and warranties. With these factors in mind, you can choose an energy-efficient window air conditioner that will keep you comfortable while saving you money on your energy bills.

How does an energy-efficient window air conditioner compare to a central air conditioning system in terms of energy efficiency?

When it comes to energy efficiency, a central air conditioning system is generally more efficient than a window air conditioner. This is because central AC systems utilize a more complex system of ductwork and vents to cool an entire home, while window AC units are designed to cool a single room or small space.

Central AC systems also have the advantage of being able to regulate the temperature throughout the entire home, whereas a window AC unit only cools the room it is installed in. This means that central AC systems can be more efficient in terms of energy usage because they are better equipped to cool larger spaces.

However, it is worth noting that there are energy-efficient window AC units available on the market that can rival the efficiency of some central AC systems. These units often come with Energy Star ratings and utilize advanced technology to cool spaces while using less energy.

Ultimately, the most energy-efficient option will depend on the specific needs and size of the space being cooled. Consulting with an HVAC professional can help determine the best option for energy efficiency and cost-effectiveness.

How long do energy-efficient window air conditioners typically last?

Energy-efficient window air conditioners typically last for around 10-15 years with proper maintenance and care. However, this lifespan can vary depending on how often the unit is used, the quality of the unit, and how well it is maintained.

Regular maintenance of the air conditioner, such as cleaning the filter, coils, and fins, can help to extend its lifespan. It is also important to ensure that the unit is installed properly and that there is adequate ventilation around it to prevent overheating and other issues.

In addition, choosing a high-quality energy-efficient air conditioner from a reputable brand can also make a difference in how long it lasts. It is important to do your research and choose a unit that is appropriate for the size of the room or space it will be used in.

Overall, investing in an energy-efficient window air conditioner and properly maintaining it can provide you with cool comfort for many years to come.

What are the most energy-efficient window air conditioners on the market?

When it comes to finding the most energy-efficient window air conditioners, there are a few top contenders on the market. One of the best options is the Frigidaire FFRE083ZA1, which has an Energy Star certification and an Energy Efficiency Ratio (EER) of 12. It also features a programmable timer and a remote control for convenient usage. Another popular choice is the LG LW8016ER, which also has an Energy Star certification and an EER of 12.1. It has a 24-hour timer and three cooling speeds to choose from. A third option is the Haier Serenity Series ESAQ406T, which has an EER of 12.2 and a unique design that reduces noise levels. It also has a 24-hour timer and four cooling modes. Ultimately, the most energy-efficient window air conditioner for you will depend on your specific needs and budget. It's important to look for models with high EER ratings and Energy Star certifications to ensure maximum energy savings.

What is the cost of operating an energy-efficient window air conditioner?

The cost of operating an energy-efficient window air conditioner depends on several factors, including the unit's size, its energy efficiency rating, the local cost of electricity, and the duration and frequency of use. However, on average, an energy-efficient window air conditioner with a rating of 10,000 BTUs and an energy efficiency ratio (EER) of 12 can cost between $50 to $100 per year to operate. This is significantly lower than older models with lower EER ratings, which can cost up to $200 per year to operate. To reduce your energy costs, you can also consider using a programmable thermostat to adjust the temperature when you are not at home. Additionally, regular maintenance, such as cleaning or replacing the air filters, can also help to improve the unit's energy efficiency and reduce operating costs.

What is the SEER rating of the most energy-efficient window air conditioners?

The SEER rating, which stands for Seasonal Energy Efficiency Ratio, is a measure of the efficiency of air conditioning equipment. However, SEER ratings are typically used for central air conditioning systems rather than window air conditioners.

For window air conditioners, the energy efficiency rating that is used is the Energy Efficiency Ratio (EER). The most energy-efficient window air conditioners on the market typically have an EER rating of around 12 or above.

It's important to note that the higher the EER rating, the more energy-efficient the air conditioner is, which means it will save you money on your energy bills in the long run. So, if you're in the market for a window air conditioner, be sure to look for models with a high EER rating.

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