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

The GE Window Air Conditioner Unit, offering 6,000 BTU, is specifically designed for small rooms up to 250 sq ft. It stands out with its energy-efficient operation, providing three cooling modes and fan speeds, which can help maintain optimal room temperature. This makes it an excellent choice for small bedrooms, studio apartments, or home offices where space is limited and comfort is essential.

One of its notable strengths is the inclusion of a programmable timer and remote control, allowing for convenient operation and customization of cooling schedules. The unit operates at a noise level of 56 dB, which is relatively quiet, making it suitable for nighttime use without much disruption. However, it does not meet Energy Star requirements, which might be a consideration for users focusing on top-tier energy efficiency.

With an Energy Efficiency Ratio (EER) of 11, it performs decently in terms of energy consumption, although there are more efficient models available on the market. Installation is straightforward thanks to the included EZ Mount installation kit, and maintenance is simplified with a washable, slide-out filter that should be cleaned every 30 days to ensure optimal performance. While the unit lacks Energy Star certification, its compact size (13.38 x 16.36 x 12.59 inches) and light weight (4.8 pounds) make it easy to install and manage. It also has strong user feedback, with a 4.3 out of 5-star rating from over 7,000 reviews, highlighting user satisfaction with its cooling performance and ease of use. This air conditioner is a practical choice for those seeking an efficient and manageable cooling solution for smaller spaces, although energy-conscious consumers might consider units with a higher EER or Energy Star rating.

The Frigidaire 6,000 BTU Window Air Conditioner is designed to comfortably cool rooms up to 250 square feet, making it a good choice for bedrooms or small living spaces. With a cooling power of 6,000 BTUs, it delivers adequate performance for its size. The unit operates quietly at about 51 dB, which is roughly the noise level of a quiet conversation, so it won't be disruptive during sleep or work. It includes useful features like a remote control and a 24-hour programmable timer, which help you customize cooling to your schedule without needing to get up to adjust settings. Another convenience is the Clean Filter alert combined with a washable dust filter, which makes maintenance straightforward and helps keep the air cleaner.

Energy-wise, it offers an Eco Mode and Sleep Mode to reduce electricity use, but it does not have an Energy Star rating, and its Seasonal Energy Efficiency Ratio (SEER) is 11, which is moderate but not top-tier for energy efficiency. This means it saves some energy but may not be the most economical option for heavy or long-term use. The unit also provides features like 6-way directional airflow and Dry Mode to remove excess humidity, adding to comfort. Installation is typical for window units, and the size is compact enough for standard windows.

The unit's warranty is a standard one year, which is fairly common but may be short for some users. This Frigidaire air conditioner suits those needing quiet, easy-to-use cooling in smaller spaces with some energy-saving features, though it may not be ideal if you want the highest energy efficiency available.

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.