10 Best Energy Efficient Ac Window Unit 2025 in the United States

The Midea MAW06R1CWT EasyCool 6,000 BTU Window Air Conditioner is a versatile unit designed for small spaces up to 250 square feet. It offers three modes: cooling, fan, and dehumidifying, which makes it suitable for different climate control needs. Its Energy Efficiency Ratio (EER) of 12.1 indicates good energy-saving performance.

The unit operates quietly at 52 dB on the low setting, making it a good choice for bedrooms or offices where noise can be a concern. The included remote control and LED display make it user-friendly, allowing you to adjust settings from across the room. Maintenance is straightforward with a removable and reusable air filter that helps keep the air clean.

Installation is relatively easy with all necessary mounting accessories included, although a screwdriver is required and some may find pre-drilling pilot holes useful. The Eco Mode and EasyTimer features provide customizable options to enhance energy efficiency. The unit comes with a one-year parts and labor warranty, adding a layer of assurance for buyers. This air conditioner is ideal for those seeking an affordable, easy-to-use, and efficient solution for cooling small areas.

The Midea 8,000 BTU Smart Inverter Window Air Conditioner is a strong choice for anyone looking to cool or heat rooms up to 350 square feet efficiently. It features an energy-saving inverter compressor with an Energy Star rating, helping reduce electricity costs by up to 35% compared to standard models. Its cooling power of 8,000 BTUs is suitable for medium-sized rooms, making it ideal for bedrooms, apartments, or small living areas. The unit operates quietly at about 45 decibels, so it won't disturb your conversations, work calls, or sleep.

It also offers multiple modes — cooling, heating (effective when outdoor temperature is above 41°F), dehumidifying, and fan-only — controlled through an easy-to-read LED display, remote control, or even your smartphone via WiFi. Voice commands through Alexa or Google Assistant add extra convenience. Maintenance is straightforward with a washable front-access filter, helping maintain good air quality and performance without extra costs on replacements. Installation fits most double-hung windows between 24 and 38.5 inches wide, with clear instructions and included hardware.

This air conditioner provides a quiet, efficient, and versatile option for moderate spaces where energy savings and smart control are priorities. The 1-year warranty is relatively short compared to some competitors, and the heating function is limited by outdoor temperature, so it’s not a full replacement for a dedicated heater in colder climates.

The GE 5000 BTU Electronic Window Air Conditioner is a solid choice for cooling small rooms up to 150 sq ft, such as bedrooms or home offices. Its 5000 BTU rating means it can efficiently handle these smaller spaces without excessive energy use. While it doesn’t have the highest energy efficiency ratio (SEER of 2.6) and isn’t Energy Star certified, it still offers decent energy savings thanks to three cooling modes and fan speed options that help you customize comfort. Noise level is moderate at 52 dB, which is fairly quiet and should not disturb sleep or work.

Installation is a strong point: the included EZ Mount kit and fixed chassis design make it easy to fit into most double-hung windows, and the slide-out filter simplifies cleaning every month, helping maintain the unit’s performance over time. The unit’s size is compact enough to fit standard windows, though it weighs about 36 pounds, so handling might require some care.

On the downside, it lacks a programmable thermostat, which means you can’t set cooling schedules for automatic operation. Also, it uses R-35 refrigerant, which is less common and might affect future servicing options. For straightforward, affordable cooling in small spaces with simple installation and low noise, this GE model performs well, but those seeking top energy efficiency or advanced features might find it limited.