10 Best Quietest Portable Air Conditioners 2025 in the United States

The BLACK+DECKER Smart Portable Air Conditioner with Heat, boasting 14,000 BTU ASHRAE (10,000 BTU DOE) cooling and 12,000 BTU heating, is versatile and suitable for rooms up to 700 sq. ft. It's a four-in-one unit, functioning as an air conditioner, heater, dehumidifier, and fan, making it ideal for year-round use. The noise level is relatively low at 54 dB, ensuring it operates quietly, enhancing comfort, especially in bedrooms.

The unit is portable, featuring dimensions of 16.5” x 14.06” x 27.09” and weighing 35 pounds, which makes it fairly easy to move between rooms as needed. Additionally, the included installation kit facilitates a straightforward setup process. Energy efficiency is moderate with a SEER of 6.2, though it is not Energy Star rated, suggesting there are more efficient options available on the market.

The smart features, including Wi-Fi connectivity, mobile app control, and voice control via Amazon Alexa or Google Assistant, add convenience, allowing easy adjustments to settings from anywhere in the room. The 'Follow Me' remote control is particularly useful as it acts like a thermostat, providing precise temperature control. This unit is best suited for individuals looking for a multi-functional, easy-to-control portable air conditioner that offers moderate energy efficiency and quiet operation, ideal for medium-sized rooms.

The BLACK+DECKER Portable Air Conditioner is designed for rooms up to 400 square feet, offering 9,000 BTU cooling (5,300 BTU SACC). It combines three functions—air conditioning, fan, and dehumidifier—making it versatile for managing hot and humid conditions. One of its notable features is the Follow Me remote control, which acts like a thermostat by measuring temperature near the remote for more precise cooling where you are. The unit is reasonably portable thanks to built-in casters and side handles, though it weighs around 45 pounds, so it’s more suited for moving within a home rather than frequent transport. It includes an easy-to-install window kit for venting hot air outside, which helps with setup.

In terms of noise, it runs at about 52 decibels, which is moderately quiet but not whisper-quiet—quiet enough for bedrooms or living rooms without being too intrusive. The energy efficiency ratio (EER) is 6.2, which is average; it won’t be the lowest on your electric bill but is fairly standard for this size of portable AC. Its dehumidifying capacity of 19.2 liters per day helps reduce moisture, improving comfort beyond just cooling.

It is important to consider that the effective cooling area is capped at 400 sq. ft., so it’s best for small to medium rooms. It doesn’t have a high energy star rating, so energy-conscious buyers might find more efficient options. Also, while the remote control adds convenience, the unit’s size and weight mean it’s not ultra-compact compared to some other portable ACs. The one-year limited warranty is standard but somewhat limited. This model represents a solid choice if you want a reliable, multi-function portable AC with decent noise levels and easy mobility for use in bedrooms or small living spaces. If you prioritize ultra-quiet operation or highest energy efficiency, other options may be more suitable.

The BLACK+DECKER 10,000 BTU portable air conditioner is designed for rooms up to 450 square feet, making it a good choice for medium-sized bedrooms or living spaces. It offers solid cooling power with 10,000 BTUs, although its actual cooling capacity for efficiency (SACC) is 5,800 BTUs, which is typical for units in this range. Running at 52 decibels, it is reasonably quiet for a portable AC, so it should not be too disruptive during sleep or work. Its Energy Star 5-star rating and SEER of 6.7 mean it uses energy efficiently, helping to keep electricity costs lower than less efficient models.

This model also functions as a dehumidifier and fan, adding versatility especially in humid climates. The dehumidification capacity is modest, suitable for general use but not for heavy moisture removal. Portability is well considered, with casters and side handles making it easy to move around despite its 47-pound weight. The included remote control and 24-hour programmable timer allow for convenient temperature management without needing to get up, while the washable filter and auto water evaporation simplify maintenance.

The unit is somewhat tall (almost 25 inches), which might limit placement options in tight spaces. The window installation kit is straightforward but requires a standard window setup. It delivers good performance for its size and price, and if ultra-quiet operation below 50 dB or very high dehumidification is not a priority, this model balances cooling, portability, and ease of use well, making it a solid pick for anyone seeking a quiet and efficient portable air conditioner for personal or small-room cooling.