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 12,000 BTU Smart Inverter Air Conditioner is a strong choice if you want a quiet and energy-efficient unit for a medium to large room up to 550 square feet. It offers a good cooling capacity suitable for most bedrooms or living rooms, combined with a heat feature for cooler seasons, although the heating won’t work below 41°F. Its noise level is impressively low at about 45 decibels, meaning it runs quietly enough not to disrupt conversations, TV watching, or work calls, which is great for bedrooms or home offices. The inverter technology helps save energy by adjusting the compressor speed, and the unit is Energy Star certified, promising up to 35% less electricity use than standard models.

You can control it easily via remote, an app, or voice assistants like Alexa, providing convenience and modern smart home integration. It also has multiple fan speeds and modes to customize comfort, plus a dehumidifier function that helps improve indoor air quality during humid weather. Installation is designed for standard double-hung windows, and everything needed is included in the package. On the downside, the noise spec shows 58 dB in some descriptions, which is a bit louder than the lowest claim, so expect some sound on higher fan settings. Also, while the heat function is useful, it isn’t reliable in very cold weather.

The unit’s size means it requires a suitable window opening and may not fit all window types. This Midea air conditioner suits anyone wanting a quiet, efficient, easy-to-use window unit that cools well and adds some heating, ideal for year-round comfort in medium to large rooms.

The Daikin 24,000 LV Series Mini Split Heat Pump is a strong candidate for anyone seeking a quiet and efficient air conditioning solution. It operates at a low noise level of 37 decibels, which is quieter than many traditional AC units, making it ideal for bedrooms, offices, or living spaces where minimal noise is important. With a cooling capacity of 21,400 BTUs, it can comfortably cover up to 1,460 square feet, suitable for medium to large rooms or open areas. Its high energy efficiency rating of 19.5 SEER2 means it uses electricity wisely, potentially saving you money on energy bills compared to less efficient models. The inverter technology helps maintain consistent temperatures without frequent on-off cycles, improving comfort and further reducing noise.

The system includes multiple fan features such as customizable air direction and 3D airflow, enhancing comfort by distributing air evenly. Installation is of the split system type, which requires mounting an indoor unit and placing the outdoor condenser outside, usually involving professional installation. This setup is great for spaces where ductwork is impractical. While very efficient, this unit is not Energy Star rated, which some buyers specifically look for. Also, despite its quiet operation, 37 dB may still be noticeable in very quiet environments. The included installation kit is a plus for easier setup, but the system weighs 190 pounds, which might be a consideration for mounting and installation.

This Daikin model combines quiet performance with strong cooling power and energy efficiency, making it well-suited for those wanting a reliable, low-noise air conditioner for medium to large spaces.