The Best Window AC Units in 2024: Energy-Efficient Cooling for Any Space

Out of the millions of air conditioners sold in the US in 2019, nearly a million of them were window AC units. So why are they so popular? It's simple: window air conditioners are more...

Out of the millions of air conditioners sold in the US in 2019, nearly a million of them were window AC units. So why are they so popular? It's simple: window air conditioners are more energy-efficient, easier to install, and better at cooling multiple rooms compared to other types of AC units. Plus, you can save thousands of dollars by opting for a window unit instead of a mini-split or central AC system.

However, not all window units are created equal. To choose the best one for your needs, you need to consider factors like BTU capacity, window type, and EER rating. To help you make an informed decision, we at LearnMetrics have compared the specifications of over 70 window air conditioners and compiled a list of the best window AC units to buy in 2024.

Window Air Conditioner Buyer’s Guide (5 Key Factors)

Before we reveal the top window AC units, let's go over the key factors you should consider when making a purchase:

1. Capacity in BTU: Cooling the Right Space

Choosing the right capacity for your window air conditioner is crucial. Too small, and it won't cool your space effectively. Too large, and you'll waste energy. A general rule of thumb is to multiply the square footage of the room you want to cool by 20. For example, a 500 sq ft room would require a 10,000 BTU window AC unit for optimal efficiency. However, if you want to err on the side of caution, multiply the square footage by 30.

2. Types of Window Air Conditioners: Finding the Right Fit

Window air conditioners come in different types, including standard, sliding, and casement. Standard window AC units are designed to fit double-hung windows, which are the most common type. However, if you have sliding or casement windows, you'll need a vertical window AC unit specifically designed for those window types. Remember to measure your window dimensions to ensure a proper fit.

3. Energy Efficiency: Saving on Your Electricity Bill

To determine the energy efficiency of a window AC unit, look for its Energy Efficiency Ratio (EER). EER is calculated by dividing the cooling capacity (in BTU) by the power consumption (in watts). The higher the EER rating, the more energy-efficient the unit. Most window AC units have an EER rating around 10, but some high-end models can achieve even higher EER ratings by using inverter compressors.

4. Price Range: Balancing Budget and Quality

Window air conditioners are generally more affordable than portable or central AC units. The price of a window unit depends on its capacity, EER rating, and brand. Here's a rough estimate of price ranges for different BTU capacities:

Capacity Cheap Average Premium
6,000 BTU $200 to $250 $250 to $350 $350 to $500
8,000 BTU $250 to $300 $300 to $400 $400 to $550
10,000 BTU $300 to $350 $350 to $450 $450 to $600
12,000 BTU $350 to $400 $400 to $500 $500 to $700
15,000 BTU $400 to $450 $450 to $550 $550 to $600

Remember that the price also depends on additional features such as dehumidifier or heater functions.

5. Add-Ons and Extra Features: Customizing Your Cooling Experience

Some window AC units come with additional features like built-in dehumidifiers or heaters. These 3-in-1 or 4-in-1 units can save you money and space by combining multiple HVAC functions into one device. However, keep in mind that window units with heaters can be more expensive and less energy-efficient compared to units without heaters.

Now that you know what to look for, let's dive into the top 9 window AC units for 2024:

#1 Midea U Inverter MAW08V1QWT: The Ultimate Window AC Unit

In 2024, the Midea U Inverter (MAW08V1QWT model) is making waves in the air conditioner industry. This window AC unit combines technological advancements, energy efficiency, and sleek design. With its advanced DC inverter technology, the Midea U Inverter boasts an ENERGY STAR Most Efficient 2021 Certification. It uses 35% less energy and operates at a whisper-quiet 42 dB, making it the most efficient and quietest window AC unit on the market.

Other features that set the Midea U Inverter apart include its U-shaped design, convenient smart control via the MideaAir app, and flexible installation options that allow you to have an open window while the unit is running. Available in 8,000, 10,000, or 12,000 BTU capacities, the Midea U Inverter is the perfect blend of efficiency, style, and functionality.

#2 LG LW1216ER: The Popular Powerhouse

The LG LW1216ER is a spectacular window AC unit that excels in every HVAC metric. Equipped with LG's new rotary compressor, this unit achieves an impressive EER rating of 12.1—well above the average for window AC units. With this energy efficiency, you can save over $250 in 10 years compared to a standard unit. Plus, the built-in dehumidifier can remove 3.8 pints of water per hour.

The LW1216ER offers a range of convenient features like Auto Restart, 24h On/Off Timer, and an easy-clean air filter. It also utilizes SmartThinQ technology, allowing you to control the unit using your smartphone or voice commands through Amazon Alexa or Google Assistant. Available in capacities ranging from 5,000 to 24,500 BTU, the LG LW1216ER is the ultimate combination of energy efficiency, functionality, and user-friendliness.

#3 Della 048-TL-WAC6K: The Budget-Friendly Champion

If you're looking for a budget-friendly window AC unit without sacrificing performance, the Della 048-TL-WAC6K is the one for you. This unit delivers high energy efficiency with an impressive EER rating of 12.2. It can cool rooms ranging from 150 sq ft to over 500 sq ft, making it suitable for various spaces. The Della 048-TL-WAC6K also serves as a dehumidifier, extracting 1.9 pints of water per hour.

Despite its affordability, the Della 048-TL-WAC6K doesn't skimp on quality. It operates at low noise levels, ensuring a peaceful environment. Plus, it comes with an installation kit that allows for easy setup. With its great specs, wide range of capacities, and attractive price point, the Della 048-TL-WAC6K is the best cost-effective window AC unit on the market.

#4 Friedrich Chill CP06G10B: The Best Through-The-Wall Choice

For those who prefer to install their AC unit through-the-wall instead of on a window sill, look no further than the Friedrich Chill CP06G10B. This unit offers outstanding energy efficiency with an EER rating of 11.2, making it one of the most efficient through-the-wall AC units available. With a range of capacities from 5,200 to 24,000 BTU, you can find the perfect fit for your space.

Keep in mind that the wall thickness must be 7 1/2" or less to accommodate the Friedrich Chill. If your wall is thicker, it's recommended to install the unit on a window instead. The Friedrich Chill CP06G10B combines energy efficiency, versatility, and quality, making it the best choice for through-the-wall installations.

#5 Frigidaire FFRS1022S1: The Ideal Vertical AC Unit

If you have casement or sliding windows, the Frigidaire FFRS1022S1 is the perfect fit. Designed specifically for casement windows, this vertical window AC unit offers excellent dehumidification capabilities and the highest airflow on the market—323 CFM. With low noise levels and a sleek design, the Frigidaire FFRS1022S1 is both efficient and aesthetically pleasing.

#6 Frigidaire GRC1044T1: The Quietest and Most Elegant

For those seeking a window AC unit that adds a touch of elegance to their space, the Frigidaire GRC1044T1 is the perfect choice. With an EER rating of 12, this unit is highly energy-efficient and capable of removing up to 3 pints of water per hour. Its sleek design and high-quality materials make it a standout option for those who prioritize style.

#7 LG LW6017R: The Most Popular and Quiet LG Unit

As a reliable and well-loved brand, LG offers a range of exceptional window AC units. The LW6017R is a popular choice due to its reliability, great specs, and affordable price. With an EER rating of 11.5, it provides efficient cooling while operating at low noise levels. The LW6017R also features a built-in dehumidifier, making it a versatile and user-friendly option for any space.

#8 MIDEA MAW08R1BWT: The Budget-Friendly Powerhouse

MIDEA is an up-and-coming brand in the HVAC world, offering high-quality units at affordable prices. The MAW08R1BWT is a standout model with an outstanding EER rating of 12 and a price tag of less than $350 for a 10,000 BTU unit. Despite its budget-friendly nature, this window AC unit offers excellent energy efficiency and a built-in dehumidifier.

#9 Haier ESAQ406T: The Well-Known Performer

Haier is a reputable HVAC manufacturer, and the ESAQ406T is a reliable and affordable window AC unit. With an EER rating of 12.2, it offers exceptional energy efficiency. While it may not have the most cutting-edge design, the Haier ESAQ406T delivers reliable performance at a competitive price point.

Feel free to share your opinion in the comments if you've come across a window AC unit with great specs and would be a good fit for this list. For more information, check out our articles on quietest window air conditioners, biggest window AC units, low-profile window units, vertical air conditioners, combination window AC and heaters, and smallest window air conditioners.

Remember, when choosing a window AC unit, consider factors like capacity, window type, energy efficiency, price range, and any additional features you desire. With the right window AC unit, you can stay cool and comfortable throughout the summer while saving energy and money.