10 Best Lightweight Window Air Conditioner 2025 in the United States

The LG 8,000 BTU Window Air Conditioner is a solid choice for cooling medium-sized rooms up to about 350 square feet, such as bedrooms or small living rooms. Its cooling power fits spaces roughly 14 by 25 feet, covering many common room sizes effectively. Notably, it operates quietly, running as low as 53 decibels on the lowest fan setting, so it won’t disturb sleep or work. It offers three fan speeds and an Auto Cool mode, allowing easy airflow adjustment for comfort. The unit includes convenient features like a remote control, a digital panel for simple operation, and a 4-way air deflection to direct cool air where desired. Maintenance is straightforward with a slide-out, washable filter and a filter light reminder. The Auto Restart feature ensures it turns back on after a power outage, which is beneficial in areas with unstable electricity.

However, the unit weighs 58 pounds, which might require two people for safe installation. It is not Energy Star rated and has a Seasonal Energy Efficiency Ratio (SEER) of 13, indicating it is less energy-efficient compared to some other models and may incur higher electricity costs with frequent use. The dimensions are compact but typical for this cooling capacity. A 1-year warranty covering parts and labor is included. This LG model is suitable for those seeking a reliable, quiet air conditioner that cools efficiently without too many complicated features, making it ideal for bedrooms or smaller apartments where noise level and ease of use are priorities.

The Midea Duo 14,000 BTU portable air conditioner is a powerful and efficient unit designed to cool spaces up to 550 sq. ft. It boasts an innovative duo hose design, enhancing air circulation and preventing unwanted heat from entering the room. This feature makes it highly effective in maintaining a consistent temperature. Additionally, it's equipped with inverter technology, meaning it uses significantly less electricity, which translates to energy savings of over 40% compared to traditional units. Most users will appreciate this cost efficiency.

The cooling performance is impressive, providing rapid and strong cooling, making it ideal for hot summer days. It's also relatively quiet, with a noise level as low as 42 dB, comparable to the ambiance of a library, making it suitable for bedrooms and living areas without causing much disturbance. Another convenient feature is its smart Wi-Fi capability, allowing control via smartphone apps or voice commands with Alexa and Google Assistant. This adds a layer of ease for tech enthusiasts.

On the downside, the unit's dimensions (16.73”D x 19.53”W x 34.48”H) and weight might make it slightly cumbersome for some users to move around. Also, while it has a decent SEER of 12.3, it's worth noting that there are more energy-efficient models available if that is a top priority. Despite these minor drawbacks, the Midea Duo stands out for its advanced cooling technology, quiet operation, and smart features, making it a solid choice for anyone needing a portable air conditioner with modern conveniences.

The LG 10,000 BTU Smart Window Air Conditioner is designed to cool rooms up to around 400-450 square feet, making it a solid choice for medium-sized bedrooms, living rooms, or apartments. Its Dual Inverter technology helps the unit run quietly—down to about 44 decibels in sleep mode—which is great if you want to avoid disruptive noise. LG also highlights energy efficiency; this model exceeds Energy Star requirements by about 25%, which can help save on electricity bills over time.

Weighing 63 pounds and measuring roughly 24.5 x 19.6 x 12.5 inches, it's a bit on the heavier side for a window unit, so installation might require some care or help. The air conditioner includes useful extras such as a dehumidifier, a filter light reminder to maintain air quality, and multiple fan speeds, giving you customizable comfort. Plus, it supports WiFi control through LG ThinQ and works with Alexa and Google Assistant, allowing you to manage settings remotely or by voice—convenient if you already use smart home devices.

While 58 dB is quiet for an air conditioner, it might still be noticeable in very quiet environments. Also, the 1-year warranty is standard but not extensive. This air conditioner is well-suited for those seeking a blend of strong cooling performance, energy savings, and smart features, though it’s a bit heavier and pricier than basic models.