10 Best Quiet Air Conditioners 2025 in the United States

The BLACK+DECKER Smart Portable Air Conditioner with Heat offers a versatile solution for year-round climate control in rooms up to 700 sq. ft. It features 14,000 BTU ASHRAE 128 (10,000 BTU DOE) cooling capacity and 12,000 BTU heating, making it suitable for both hot summer months and cold winter conditions. The unit is relatively quiet, operating at 54 dB, which is a key strength for those seeking a quieter air conditioner for their bedrooms or living spaces.

Its energy efficiency ratio (EER) is modest at 6.2, indicating it might not be the most energy-efficient option available, potentially resulting in higher electricity bills. It compensates with smart features including Wi-Fi connectivity, voice control via Amazon Alexa or Google Assistant, and a mobile app for convenient operation. The 'Follow Me' remote control enhances temperature precision by acting as a thermostat.

Additional features include a programmable timer, multiple fan speeds, and dehumidifier function, providing comprehensive climate control. The unit comes with a complete installation kit, making the setup process straightforward. Weighing 35 pounds and being portable, it’s easy to move between rooms. This air conditioner is ideal for users looking for versatility and smart control, though those prioritizing high energy efficiency might need to consider other options.

The BLACK+DECKER 12,000 BTU Portable Air Conditioner is designed for rooms up to about 550 square feet, making it a good pick for medium-sized bedrooms or offices. It produces a noise level of 52 dB, which is moderately quiet—noticeable but unlikely to disturb most people during sleep or work. Its cooling capacity of 12,000 BTU (ASHRAE standard) provides solid performance to quickly cool your space. While it’s not Energy Star rated, the unit has a Seasonal Energy Efficiency Ratio (SEER) of 5.8, which is average and means it won’t be the cheapest on your electric bill but still reasonably efficient for a portable AC.

The 3-in-1 functionality allows you to switch between air conditioning, fan, and dehumidifier modes, adding versatility beyond cooling alone. The remote control and 24-hour programmable timer provide user-friendly ways to adjust settings from a distance or on a schedule. Portability is a strong point here, thanks to its relatively compact size, casters, and side handles, making it easy to move between rooms without hassle. Installation includes a window kit with all necessary parts for venting hot air outside, which is a plus for quick setup.

The water tank capacity is 0.8 liters, which means occasional draining may be necessary if the auto-evaporation feature doesn’t fully handle moisture buildup. It offers a standard warranty period, which may be a consideration for those seeking longer-term assurance. This BLACK+DECKER portable air conditioner delivers reliable cooling with decent quietness and handy controls, ideal for those wanting flexible, room-to-room comfort without complex installation or high noise.

The BLACK+DECKER 10,000 BTU Portable Air Conditioner is designed to cool rooms up to 450 sq. ft., making it suitable for bedrooms, living rooms, or small apartments. With a noise level of 52 dB, it operates quietly enough for most users to sleep comfortably while it's running. The cooling capacity of 10,000 BTU ensures efficient cooling performance even on hot summer days.

This unit is versatile, functioning as an air conditioner, dehumidifier, and fan, which adds to its utility in varying weather conditions. Energy efficiency is moderate with a SEER rating of 6.7, suggesting it could be more energy-saving. The inclusion of a 24-hour programmable timer is a convenient feature for controlling the unit without manual intervention. Additionally, the remote control adds ease of use, allowing adjustments from across the room.

The portable design with casters and side handles makes it easy to move the unit as needed, and the easy-to-install window kit simplifies the setup process. Despite minor drawbacks in energy efficiency, the BLACK+DECKER 10,000 BTU Portable Air Conditioner offers a good balance of performance, convenience, and quiet operation.