10 Best Quietest Air Conditioner 2025 in the United States

The BLACK+DECKER Smart Portable Air Conditioner with Heat offers a mixed bag of features for those looking for a quiet and efficient cooling and heating solution. One of its strong points is its versatility, functioning as a 4-in-1 unit that can cool, heat, dehumidify, and act as a fan, making it suitable for year-round use. With a cooling capacity of 10,000 BTU (DOE) and heating capacity of 10,000 BTU, it's designed for rooms up to 700 sq. ft., which covers a decent-sized area.

The device is also smart-enabled, allowing you to control it via a mobile app or through voice commands using Amazon Alexa or Google Assistant, which adds convenience for tech-savvy users. It also features a 'Follow Me' remote control, providing precise temperature control based on the remote's location. However, there are some drawbacks. The noise level is 54 dB, which while not extremely loud, may not be the quietest option available on the market—something to consider if noise is a top priority. The Seasonal Energy Efficiency Ratio (SEER) is 6.2, which is on the lower side, meaning it may not be the most energy-efficient choice. Additionally, it's not Energy Star rated, so it might not offer the best energy savings.

Installation is relatively straightforward with the included window kit, making it easy to set up, but keep in mind that it's a portable unit and might take up some floor space. Weighing 35 pounds, it's relatively easy to move around. This unit could be a good fit for those who need a versatile, smart-enabled air conditioner and heater, but if you need the quietest and most energy-efficient option, you might want to explore further.

The Midea 8,000 BTU Smart Inverter Air Conditioner is a strong choice if you're looking for a quiet window AC unit that also offers heating and dehumidifying functions. It cools rooms up to 350 square feet, making it suitable for bedrooms, living rooms, or small apartments. One of its biggest strengths is the low noise level of just 45 dB, which is quiet enough not to disturb conversations, work calls, or sleep. This makes it stand out among many window units which can be quite loud. The inverter technology helps it cool efficiently and save up to 35% on electricity compared to standard models, which is handy if you want to keep energy bills down.

You get three fan speeds and five modes including heat, cool, dry, fan only, and auto, offering good flexibility depending on your needs and weather. Installation fits double-hung windows between 24 and 38.5 inches wide, which covers many typical window sizes, but it’s worth checking your window measurements before buying. The unit can be controlled via remote, a mobile app, or voice assistants like Alexa and Google Assistant, adding modern convenience.

The heating function only works effectively when the outside temperature is above 41°F, so it might not fully replace a dedicated heater in colder climates. Also, while 8,000 BTU is adequate for medium rooms, it won’t be enough for larger spaces. The unit weighs 56 pounds, so installation might require some effort or help. This Midea model is well suited if you want a quiet, energy-efficient window air conditioner with extra features like heating and smart controls, ideal for medium-sized rooms and moderate climates.

The BLACK+DECKER 8,000 BTU Portable Air Conditioner is a versatile option for cooling spaces up to 350 sq. ft. It's compact and portable, making it easy to move from room to room with the included casters and side handles. The 54 dB noise level means it operates relatively quietly, which is essential for those seeking a peaceful environment.

With a Seasonal Energy Efficiency Ratio (SEER) of 5.4, it’s not the most energy-efficient unit on the market, so it may lead to higher electricity bills in the long run. However, its 3-in-1 functionality, serving as an air conditioner, dehumidifier, and fan, adds to its versatility and utility. The Follow Me remote control feature is quite handy as it allows for precise temperature control. The included installation kit makes setting up the unit straightforward and user-friendly.

On the downside, the cooling capacity, while sufficient for small to medium rooms, may not be adequate for larger spaces. Additionally, it’s relatively heavy at nearly 53 pounds, which might be a consideration for those with mobility concerns. This unit is best suited for users who prioritize portability and low noise operation over energy efficiency.