10 Best Quietest Air Conditioner 2025 in the United States

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.

The Daikin 18,000 BTU LV Series mini-split is a solid choice if you're looking for a quiet, energy-efficient air conditioner for spaces up to about 1,000 square feet. It operates at a low noise level of just 37 decibels, which is quieter than many traditional window or central AC units, making it great for bedrooms, offices, or living rooms where peace is important. Its cooling power is strong enough to handle medium to large rooms comfortably, with the added benefit of heating capability, so it works year-round.

The unit uses advanced DC inverter technology, which helps it adjust its power smoothly for efficient energy use, reflected in its high 19.5 SEER2 rating—this means lower electricity bills compared to older or less efficient models. Installation requires a wall-mounted split system setup, which is more flexible and less intrusive than ducted systems, perfect for homes without existing ductwork or where installing ducts would be difficult. The system includes helpful features like remote control, customizable airflow, and an air-purifying filter for better indoor air quality.

It is important to note that while the unit is quiet and efficient, it might involve professional installation and the upfront cost can be higher than simpler window units. Also, it’s designed for specific room sizes, so oversizing or undersizing could affect performance. For those seeking a quiet, energy-smart solution that cools and heats efficiently with modern features and are comfortable with installation requirements, this Daikin mini-split is a strong contender.

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.