10 Best Lightest Air Conditioner 2025 in the United States

The BLACK+DECKER 8,000 BTU Portable Air Conditioner is a solid choice for cooling small to medium rooms up to around 300-350 sq. ft. It offers a respectable cooling capacity of 8,000 BTU, which should be enough for many bedrooms or small living spaces. Weighing about 45.8 pounds, it’s not the lightest model available but still manageable thanks to its caster wheels and side handles for easier movement between rooms.

In terms of energy efficiency, it has a Seasonal Energy Efficiency Ratio (SEER) of 5.4, which is average and doesn’t carry an Energy Star rating. This means it might use more electricity than some more efficient models, so keep that in mind if your energy bills are a concern. The noise level is 54 decibels, which is moderate and generally won’t be too disruptive during use, especially while sleeping or working.

Installation is straightforward with the included window kit and exhaust hose, so you won’t need professional help to set it up. The unit also includes handy features such as a remote control, a slide-out washable filter, an auto water evaporation system, and a 24-hour timer. Plus, it functions as a 3-in-1 device — acting as an air conditioner, fan, and dehumidifier — which adds versatility. Although it is heavier than some portable AC models closer to 30 pounds, it still offers user-friendly mobility and decent cooling power for small rooms, while trading off some efficiency and weight compared to lighter or more energy-efficient models.

The Midea MAW08HV1CWT EasyCool Smart Inverter Air Conditioner Window Unit is a versatile option for those seeking year-round comfort in a compact design. At 56 pounds, it offers a balance between portability and functionality, suitable for large rooms up to 350 square feet. The 8,000 BTU cooling capacity ensures effective cooling, while the supplemental heat feature provides warmth during cooler months, making it a multi-season solution.

The unit is energy-efficient with a SEER of 14.5 and Energy Star certification, promising up to 35% in energy savings compared to the standard. Users can control the AC through an LED display, remote control, or via the SmartHome app, with the added convenience of voice control through Alexa and Google Assistant. It operates quietly at 45 dB, which is beneficial for maintaining a peaceful environment.

Installation is straightforward, fitting double-hung windows with specific dimensions. However, its weight might make installation a bit challenging for some users, and the heat pump functionality is limited to outside temperatures above 41°F. The unit comes with additional features like a washable filter, dehumidification, and various modes to optimize comfort.

The LG 12,200 BTU Window Air Conditioner is designed to cool medium-sized rooms up to 570 square feet, making it a solid choice for spaces like living rooms or larger bedrooms. It offers a decent cooling capacity with 12,200 BTUs and a respectable Energy Efficiency Ratio (SEER) of 11.3, which helps keep energy use reasonable. The unit also includes a supplemental heat feature, which can be helpful during cooler days, turning it into a useful year-round device. With two cooling, heating, and fan speeds, you can customize airflow to your comfort level.

Noise-wise, it operates quietly at around 50-51 decibels in low mode, comparable to the sound of a normal conversation—so it won't disturb your daily activities or sleep. Installation is straightforward for a window air conditioner, thanks to its slide in-out chassis design and included installation kit. A key point to note is its weight: at 93 pounds, it’s not the lightest option on the market, which might make installation a bit challenging if you’re doing it alone.

The unit has useful extra features like a dehumidifier, dust filter with a reminder indicator, and a remote control for easy operation. It comes backed by a 1-year warranty and has earned generally positive customer reviews, reflecting reliable performance. If you are looking for a moderately efficient window air conditioner with heating capability and quiet operation for medium rooms, this LG model meets those needs well, though be mindful of its heavier weight for installation.