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

The Frigidaire 12,000 BTU Window Air Conditioner is a solid choice for cooling rooms up to 550 square feet efficiently. It offers decent cooling power with 12,000 BTUs, suitable for medium to large rooms. While it doesn’t carry the Energy Star label, it includes an Eco Mode and Sleep Mode that help reduce energy use, which is advantageous for efficiency-conscious users. Noise level is moderate at 57 dB, which is relatively quiet but might still be noticeable in very quiet settings.

The unit comes with convenient features like a remote control, a 24-hour timer, and a filter light reminder that alerts you when it’s time to clean the washable dust filter, making maintenance straightforward. Its six-way directional airflow and three fan speeds allow for customizable comfort, and the Dry Mode helps manage humidity. Installation fits standard windows, but the unit is somewhat bulky (about 21 x 19 x 15 inches) and weighs 63.5 pounds, so it may require careful handling during setup.

This air conditioner balances solid cooling performance and user-friendly features, though it may not have the highest energy efficiency or the quietest operation compared to top-tier models. It also lacks advanced smart features like Wi-Fi connectivity, which some modern models offer.

The GE 5000 BTU Window Air Conditioner is a solid choice if you need a compact and efficient cooling solution for small rooms up to 150 square feet, such as bedrooms or home offices. It offers decent cooling power with 5000 BTUs and includes a washable filter, which makes maintenance easier and can help keep the air quality better over time. With a Seasonal Energy Efficiency Ratio (SEER) of 11, it performs reasonably well in terms of energy use, though it does not have an official Energy Star rating, so it may not be the most energy-saving option available. Noise-wise, it runs at about 56 decibels, which is moderate—quiet enough for nighttime use but not completely silent.

The unit features a manually adjustable fan and two cooling modes with ten temperature settings, giving you some flexibility to find your preferred comfort level, but it lacks a programmable thermostat or smart features that more advanced models offer for automatic temperature control or remote operation. Installation is straightforward with the included EZ Mount kit, fitting standard double hung windows, which is a real plus for easy setup without professional help. The size and weight are manageable, so it is not too difficult to handle.

On the downside, it is a basic model without advanced energy-saving functionalities or smart connectivity, so if you want more automation or lower running costs, you might want to consider other options. This model remains a dependable and budget-friendly choice for anyone needing simple, efficient cooling in smaller spaces without the complexity of more advanced features.

The GE 6000 BTU Electronic Window Air Conditioner is a solid choice for cooling smaller rooms up to about 250 square feet, such as bedrooms, guest rooms, or small offices. Its 6000 BTU cooling capacity is well-suited to these spaces, providing efficient and effective cooling without overworking. It operates at a noise level of 52 dB, which is relatively quiet, making it appropriate for nighttime use without causing much disturbance.

The unit offers three cooling modes and three fan speeds, allowing you to adjust the comfort level easily through digital controls. Installation is straightforward thanks to the included EZ Mount kit, fitting standard double-hung windows, and the slide-out filter is convenient to clean, helping maintain efficiency over time. The unit uses the eco-friendlier R-32 refrigerant and includes a filter that requires monthly cleaning to keep performance optimal.

This GE AC balances simplicity, reliable cooling, and ease of use, especially for those prioritizing straightforward installation and quiet operation rather than smart home integration or the highest energy efficiency ratings.