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

The Midea MAW06R1CWT EasyCool is a versatile window air conditioner that offers cooling, air circulation, and dehumidification for spaces up to 250 sq ft. It features a cooling power of 6,000 BTUs, making it suitable for small to medium-sized rooms. With a Seasonal Energy Efficiency Ratio (SEER) of 12.1, it is reasonably energy-efficient, although it does not carry an Energy Star certification. The unit operates quietly at 52 dB in low mode, which is ideal for maintaining a peaceful environment.

The programmable thermostat and remote control enable convenient adjustments, and the Eco mode and EasyTimer feature help optimize energy usage. The reusable filter is easy to maintain, ensuring clean air circulation. Installation is straightforward with all necessary accessories included, though a screwdriver is required. The product dimensions and weight are manageable, fitting well into standard window frames.

While it lacks advanced smart features, it offers solid performance with a focus on energy efficiency and user comfort. The Midea MAW06R1CWT EasyCool is particularly suitable for those seeking an affordable, easy-to-use window air conditioner with decent energy-saving capabilities.

The Amazon Basics 6000 BTU Window Air Conditioner is designed for cooling spaces up to 250 square feet, making it suitable for small to medium-sized rooms like bedrooms and home offices. With its 6000 BTU capacity, it offers efficient cooling and also has a fan-only mode for more versatile use. The unit features a Seasonal Energy Efficiency Ratio (SEER) of 12.1, indicating a decent level of energy efficiency which is important for minimizing power consumption.

One of the benefits of this air conditioner is its quiet operation, with noise levels up to 56 dB, ensuring a peaceful environment for activities such as sleeping or working. The unit also includes an easy-access washable filter, which helps capture dust and allergens, making maintenance straightforward. The customizable comfort settings, with 7 temperature options and 2-speed fan modes, allow users to tailor the cooling experience to their preferences, supported by 2-way air direction control.

Installation is fairly simple with an adjustable window kit that accommodates windows 23" to 36" wide, though basic tools like a screwdriver are necessary. However, it's essential to consider that window installation might not suit all window types, so checking compatibility is recommended. While the unit's energy efficiency is adequate for basic needs, it may not offer advanced smart features some users might desire in modern energy-efficient models. Also, the mechanical controls are intuitive but lack the digital or smart connectivity that allows remote operation via smartphones or other devices, which could be a limitation for those seeking more technologically integrated solutions. Nonetheless, its basic functions and affordability make it a practical choice for straightforward cooling needs without breaking the bank.

The Midea 10,000 BTU U Shaped Smart Inverter Window Air Conditioner is a strong contender in the energy-efficient window AC category. With an Energy Efficiency Ratio (EER) boosted by advanced DC Inverter technology, it promises over 35% energy savings and holds the ENERGY STAR Most Efficient Certification, making it wallet-friendly in the long run. Capable of cooling spaces up to 450 sq. ft., it's suitable for medium-sized rooms or office spaces.

The unit operates quietly, thanks to its U-shaped design that also allows fresh air intake and window flexibility, making it 9 times quieter than traditional units at just 32 dBA noise level. Smart features include Wi-Fi control via the SmartHome app and compatibility with Alexa and Google Assistant, offering convenient remote operation and voice command capabilities. The programmable thermostat adds to ease of use, allowing precise temperature control.

Installation is straightforward, with a robust quick-snap bracket that accommodates various window types. However, the unit's dimensions require a window width of 22-36 inches and a minimal height of 13.75 inches, which might not fit all window sizes. The dust filter feature aids in air quality, though regular maintenance and cleaning are necessary. For those seeking an energy-efficient, quiet, and smartly controlled air conditioner, the Midea U stands out as a compelling choice, though its fit may be limited by window size requirements.