10 Best Energy Efficient Window Air Conditioner 2025 in the United States

The Amazon Basics Window Air Conditioner with 6000 BTU is a solid choice for cooling and dehumidifying rooms up to 250 square feet. For those seeking an energy-efficient solution, this unit stands out with a CEER of 12.1, which ensures cost-effective operation.

It comes equipped with convenient controls, including a remote, a 24-hour programmable timer, auto restart, and sleep mode, allowing you to customize your cooling experience easily. The built-in filter is both removable and washable, making maintenance easy and keeping the air clean.

Installation is designed to be straightforward, with adjustable side panels to fit standard windows, adding to its versatility. However, at 41.89 pounds, it may be a bit heavy for some users to install alone. The 6000 BTU cooling power is adequate for small to medium rooms, but those with larger spaces may need a unit with higher BTU.

The Midea 10,000 BTU U Shaped Smart Inverter Window Air Conditioner is designed for those looking for an energy-efficient cooling solution for medium-sized spaces up to 450 square feet. One of its standout features is its ultra-quiet operation, with a noise level as low as 32 dBA, making it 9 times quieter than traditional units. This is particularly advantageous for users who want to maintain a peaceful environment in bedrooms or living rooms.

Energy efficiency is a major selling point, as this model boasts over 35% energy savings compared to standard window air conditioners. It has received the ENERGY STAR Most Efficient Certification, which is great for consumers looking to lower their energy bills while being environmentally conscious.

The smart control feature allows you to operate the AC via a smartphone app or voice commands using Alexa or Google Assistant. This adds convenience, especially for users who prefer smart home integration. Moreover, the U-shaped design enhances functionality, enabling fresh air circulation while the unit is installed, which can be a unique benefit for users who want to keep their windows open.

The Midea 8,000 BTU U Shaped Smart Inverter Window Air Conditioner is a highly efficient and quiet unit ideal for cooling spaces up to 350 sq. ft. One of its standout features is its ultra-quiet operation, thanks to the U-shaped design and efficient inverter technology, which significantly reduces noise levels to as low as 32 dB. This design also allows for the window to remain partially open, providing fresh air and improved views, while still securing the unit with an anti-theft mechanism.

The unit boasts over 35% energy savings compared to traditional models, supported by its high SEER rating of 15 and ENERGY STAR Most Efficient Certification. It is also equipped with smart features, including Wi-Fi control through the SmartHome app and compatibility with Alexa and Google Assistant, making it convenient to operate remotely or via voice commands. The included remote control and programmable timer further enhance usability.

Installation is straightforward with the quick-snap bracket and fits single or double-hung windows with specific dimensions. However, at 55.6 pounds, it may require some effort to install. The air conditioner includes a dust filter, fast cooling, and dehumidifier functions, making it versatile for different needs. This air conditioner is well-suited for those looking for a quiet, energy-efficient solution with smart capabilities for a medium-sized room.