10 Best Quiet Air Conditioning Window Units 2026 in the United States

The Midea 12,000 BTU Smart Inverter Window Air Conditioner is a solid choice if you want a quiet, energy-efficient unit for a large room up to 550 sq. ft. It operates quietly, producing around 45 to 58 dB, which is low enough to comfortably work, watch TV, or relax without much interruption. Its inverter technology not only saves up to 35% on energy compared to standard models but also cools quickly and maintains a steady temperature, making it cost-effective over time.

This unit is versatile with five operation modes including heating, cooling, fan, dry (dehumidifier), and auto, so it works beyond just hot weather. However, the heating function only works above 41°F outside, so it won’t replace a full heater in very cold climates. Installation is straightforward for standard double hung windows between 24 and 38.5 inches wide, and the included kit makes setup manageable.

Smart features are a plus here—wireless control through an app or voice assistants like Alexa and Google Assistant gives you convenience that many window units lack. The LED display, remote control, and adjustable louvers add to ease of use. While it’s quieter than many window units, some users might notice the sound at higher fan speeds. Also, at about 58 dB max, it’s not the absolute quietest on the market but still quite reasonable for its power. This Midea unit is recommended if you want a multi-functional, energy-efficient window AC with quiet operation and smart controls, especially for larger rooms. Just keep in mind the heating is limited to milder cold weather and the noise, while low, is not completely silent.

The Amazon Basics 6000-BTU window air conditioner is designed for spaces up to 250 square feet, making it a good choice for bedrooms, home offices, or small living areas. Its cooling power is solid for this size, offering 6000 BTUs with two modes: cooling and fan-only. This gives you flexibility depending on how cool or breezy you want the room.

One of its strong points is the relatively quiet operation, running at about 56 dB, which is gentle enough not to disturb sleep or work. Energy efficiency is decent with a SEER rating of 12.1, meaning it should keep running costs reasonable without using too much electricity. Installation is straightforward for standard windows measuring 23 to 36 inches wide and at least 13 inches high, with an adjustable window kit and all necessary mounting parts included (though you’ll need your own screwdriver).

The unit also offers user-friendly features like a washable filter to keep the air clean, remote control, a digital temperature display, and customizable settings including 7 temperature levels and 2 fan speeds. However, at 41.9 pounds, it’s a bit heavy, which might make the installation tricky if you’re doing it alone. While the noise level is low, it’s not the quietest model on the market, so super-sensitive users might notice it. It effectively balances good cooling, ease of use, and energy efficiency for its price and is best suited for those needing a reliable, moderately quiet air conditioner in smaller spaces.

The LG 18,000 BTU window air conditioner with heat is a solid choice for cooling medium to large rooms up to about 1,000 square feet, like bedrooms, living rooms, or basements. It offers both cooling and heating, which adds value for year-round comfort. You can easily adjust the fan speeds and temperature using the digital control panel or remote, and features like a 24-hour timer and auto-restart after power outages make it convenient to use.

The noise level is around 61.7 decibels, which is a bit louder than some ultra-quiet models, so it might be noticeable in very quiet spaces. The unit requires a special 230/208V electrical outlet, which might mean additional installation work if you don’t already have this setup. Its size is fairly typical for a window air conditioner of this cooling power, but make sure your window can accommodate its 30.5" x 25.5" dimensions.

Energy efficiency is moderate with a Seasonal Energy Efficiency Ratio (SEER) of 2.8, which is average in this category but not the highest available. The included washable filter and 4-way air deflection let you customize airflow and maintenance is simple. If you need a reliable unit that can both cool and heat a large room and don’t mind some operational noise and a specific electrical requirement, this LG model is a practical option.