10 Best Efficient Window Air Conditioner 2025 in the United States

The Midea MAW06R1CWT EasyCool is a versatile 6,000 BTU window air conditioner suitable for cooling, circulating air, and dehumidifying spaces up to 250 sq. ft., making it ideal for small rooms, apartments, or offices. With a Seasonal Energy Efficiency Ratio (SEER) of 12.1, it is fairly energy-efficient, though it does not have an Energy Star certification. The unit operates at a low noise level of 52 dB, ensuring a quiet environment, which is a significant benefit for both home and office use.

The included LED display and remote control make it user-friendly, allowing you to adjust settings easily from a distance. Installation is straightforward with all necessary mounting accessories provided, though a screwdriver is required for setup. The device also features a removable and reusable filter, aiding in the maintenance of clean air by trapping dust and pet hairs. The unit’s compact dimensions (13.1 x 15.98 x 12 inches) make it easy to fit into most standard window frames (23"-36" x 14").

Additional energy-saving features like Eco mode and an EasyTimer are welcome bonuses that can help reduce electricity bills. However, the unit's lack of Energy Star certification may be a downside for those specifically looking for the most energy-efficient options. The one-year parts and labor warranty also provides some peace of mind regarding its durability and reliability.

The Frigidaire FFRA051WAE Window-Mounted Room Air Conditioner offers a cooling capacity of 5,000 BTU, which is suitable for small rooms. It features effortless temperature control, ensuring consistent comfort. The unit has an Energy Efficiency Ratio (EER) of 11, which, while not the highest, is decent for energy savings in its category.

One notable advantage is its noise level of 52 dB, making it relatively quiet during operation, which is beneficial for maintaining a peaceful environment. The unit’s compact dimensions (15.25"D x 16"W x 12"H) make it easy to install in standard double-hung windows, and the adjustable side panels help achieve a snug fit.

However, it lacks Energy Star certification, which might be a consideration for energy-conscious users. Additional features like the easy-to-clean washable filter and effortless restart enhance its usability. The extra-long power cord eliminates the need for extension cords, adding convenience. Accessories like the mounting bracket and side panel are available but sold separately. This air conditioner is a practical choice for small spaces where ease of installation, moderate energy efficiency, and quiet operation are priorities.

The LG 8,000 BTU Window Air Conditioner is a solid choice for cooling medium-sized rooms up to 350 square feet, such as bedrooms or small living spaces. One of its standout features is the low noise level of 53 dB, making it a good option for light sleepers or those who need a quiet environment for work.

With 3 cooling and fan speeds, along with an Auto Cool function, it offers flexibility in adjusting the airflow to meet your comfort needs. The unit also comes with a digital control panel and a remote control, enhancing ease of use. Additionally, features like a filter light reminder, a slide-out washable filter, and an auto-restart function after power failures add convenience and reliability. Installation is straightforward with the included window installation kit.

However, it is worth noting that the unit is not Energy Star certified, which might be a drawback for those seeking the highest energy efficiency standards. The Seasonal Energy Efficiency Ratio (SEER) of 13 is decent but not exceptional. At a weight of 58 pounds, it’s relatively heavy, which could be a consideration during installation.