10 Best Quietest Air Conditioner 2026 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 SereneLife 14000 BTU Ultra Quiet Portable Inverter Air Conditioner is designed for medium to large rooms up to 650 sq. ft, making it suitable for bedrooms, offices, or living spaces. It uses inverter technology and a high-efficiency rotary compressor to cool quickly—about 50% faster than typical portable ACs. While the product claims to operate at 43 dBA for quiet performance, the official noise level is around 53 dB, which is still reasonably quiet but may be noticeable in very quiet environments like bedrooms at night. Its energy efficiency is solid, being up to 40% more efficient than standard portable units, which helps save on electricity bills over time.

This model also offers multiple functions including cooling, heating, dehumidifying, and fan modes, controlled easily via a remote or smart Wi-Fi, adding convenience and versatility throughout the year. Installation is straightforward with the included universal window mount kit, and maintenance is simplified by a washable air filter. The unit is portable with smooth casters and has a modern, compact design that fits well in most rooms. However, it weighs about 53 pounds, which might be a bit heavy for frequent moving.

It comes with a 1-year warranty, and while it may be less silent than traditional split ACs or units specifically designed for ultra-quiet operation, this SereneLife portable AC represents a good choice for those needing efficient, all-season climate control with moderate noise levels and easy installation, especially if mobility and Wi-Fi control are important factors.

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.