10 Best Quiet Wall Air Conditioners 2025 in the United States

The Keystone 14,000 BTU Wall Mounted Air Conditioner is a powerful unit capable of cooling spaces up to 700 square feet, making it suitable for large rooms such as bedrooms, garages, and nurseries. It boasts three cooling modes, three fan speeds, and four-way adjustable air louvers, allowing for customized comfort. Additionally, it acts as a dehumidifier, removing 2.9 pints of moisture per hour, which is beneficial for humid environments.

The unit is energy-efficient, featuring 'Energy Saver' and 'Sleep' modes to help reduce electricity consumption, although it does not have an Energy Star certification. The included remote control is smartly designed to measure and display the room temperature, ensuring precise cooling control. Installation is straightforward with the universal interior trim kit, but it requires a special 230-volt/20-amp outlet, which might not be present in all homes.

While the noise level is 61.3 dB, making it relatively quiet compared to other units in its category, it might still be noticeable in very quiet environments. The product dimensions are compact, saving floor space while maintaining window views. Users have rated it 4.1 out of 5 stars, indicating general satisfaction with its performance. However, some users might find the noise level and lack of an Energy Star rating to be minor drawbacks. This unit appears to be a reliable and efficient choice for those needing significant cooling capacity in large rooms.

The LG 10,000 BTU Through the Wall Air Conditioner is a solid option for cooling rooms up to 440 square feet. With a cooling capacity of 9,800 BTU, it’s suitable for bedrooms, living rooms, or apartments. The Energy Efficiency Ratio (EER) of 10.7 means it is relatively efficient, which can help save on energy bills over time.

Additionally, the unit uses R-32 refrigerant, which is more energy-efficient and environmentally friendly compared to older refrigerants. It has three cooling speeds and three pre-programmed modes, including an energy saver mode that circulates air without constantly running the compressor, helping to maintain comfort while managing energy use. The 4-way air deflection provides flexibility in directing the airflow to where it's needed most.

One downside is its noise level, which is 60 dB—similar to normal conversation, so it might be noticeable in quieter settings. Installation is designed for through-the-wall setups and includes a snap-together trim kit for a clean indoor finish. Maintenance is straightforward with a washable, reusable filter, and a remote control adds convenience to operation. However, it is not suitable for window installation, which might limit flexibility. The unit is relatively heavy at 77 pounds, so you may need assistance with installation. Despite these considerations, it offers a one-year warranty for parts and labor. This air conditioner is a dependable choice for those needing efficient and flexible cooling for medium-sized rooms.

The Whirlpool 15,000 BTU Window Mounted Inverter Air Conditioner is a strong contender for those seeking a quiet and efficient wall air conditioner. With a noise level of 42 dB, it operates quietly enough for most living spaces, making it ideal for bedrooms, living rooms, and apartments. The unit utilizes inverter technology, which helps in reducing energy waste by controlling motor speed based on the needed power, ensuring efficient cooling for rooms up to 700 square feet.

This air conditioner is Energy Star rated, indicating its efficiency, though it only has a 1-star rating which is on the lower end of the efficiency scale. The cooling capacity of 15,000 BTU is robust, supported by 3 fan speeds and a dehumidification feature capable of removing up to 2 pints of moisture per hour. Additional convenience features include a mute mode for ultra-quiet operation, eco and sleep modes, and a 24-hour programmable timer. Maintenance is simplified with a washable filter and a clean filter alert.

Installation is typical for window-mounted units and might require some effort and assistance. Potential buyers should consider the relatively lower Energy Star rating and ensure it fits within their energy efficiency priorities.