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 Frigidaire 12,000 BTU Window Air Conditioner is designed to cool rooms up to 550 square feet, making it suitable for medium to larger rooms. It operates at a noise level of about 57 decibels, which is moderately quiet but not the absolute quietest available. This means it should be comfortable to run in living rooms or bedrooms without being too distracting, though extremely noise-sensitive users might notice it.

With three fan speeds and 6-way directional airflow, it offers customizable comfort, allowing you to adjust cooling to your preference. It also includes convenient features like a remote control, a washable dust filter with a cleaning alert, and modes such as Eco Mode and Sleep Mode to help reduce energy use and maintain comfort overnight. However, it lacks inverter technology, which could have improved energy efficiency and quieter operation. The energy efficiency ratio (SEER) is 10.9, which is decent but not outstanding, and it is not Energy Star certified.

Installation is straightforward as a window unit, and the package comes with necessary installation kits. It weighs 63.5 pounds, so some effort is needed to install it securely. This air conditioner delivers reliable cooling with convenient controls and reasonable noise levels, making it a solid choice for those seeking a balance of quiet operation and solid performance without advanced energy-saving technology.

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.