10 Best Lightweight Window Air Conditioner 2025 in the United States

The LG LW1024RD window air conditioner is a solid choice for cooling medium-sized rooms up to 450 square feet, making it suitable for larger bedrooms or living rooms. It delivers a decent cooling capacity of 10,000 BTUs, which is enough to keep such spaces comfortable during warm weather. The unit offers three fan speeds and an Auto Cool mode, allowing you to fine-tune the airflow and cooling to your preference. One noteworthy feature is the quiet operation on low mode, running at about 52 dB, so it won’t distract you with loud noise—although on higher settings, noise can reach around 60 dB, which is average for window units. The energy efficiency ratio (EER) is 11.4, which is reasonable but not the highest in its class, so you might see moderate electricity use compared to more energy-star rated models.

It includes convenient features like electronic controls with a remote and an auto-restart function that turns the AC back on after a power outage, adding to ease of use. Physically, it weighs 57 pounds and has typical window AC dimensions, which means installation may require two people and checking your window size to ensure a good fit. The unit also has a built-in dehumidifier, which can improve indoor comfort by reducing moisture. A potential downside is the one-year limited warranty, which is standard but on the shorter side for major appliances. This LG air conditioner is a reliable, user-friendly option if you want effective cooling with quiet operation and handy features for medium-sized rooms, but keep in mind it’s not the lightest or most energy-efficient model available.

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.

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.