10 Best Quiet Air Conditioning Window Units 2025 in the United States

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 Amazon Basics 5000-BTU Small Window Air Conditioner is designed for small rooms up to 150 square feet, making it a solid choice for bedrooms, home offices, or other compact spaces. Its cooling capacity is sufficient for these room sizes, providing reliable cooling without overworking. This unit operates at a noise level of about 56 decibels, which is relatively quiet for a window AC, allowing you to sleep or work without much disruption. The energy efficiency ratio (SEER) of 14 indicates it uses electricity fairly efficiently, which can help keep energy bills reasonable.

Installation is straightforward for standard windows between 23 to 36 inches wide and at least 13 inches high, with an adjustable window kit included, although you’ll need a basic screwdriver yourself. The air conditioner offers customizable comfort with 7 temperature settings, 2 fan speeds, and two-way air direction control. It also has a washable filter to help reduce dust and allergens, which adds to indoor air quality and is easy to maintain.

While 56 dB is quiet compared to many window units, it’s not completely silent, so very sensitive sleepers might notice some noise. Also, the 5000 BTU capacity limits it to smaller areas, so it won’t be effective for larger rooms. This unit is a practical, budget-friendly option for those who want a quiet, easy-to-install air conditioner for small spaces, with decent energy efficiency and useful features for everyday comfort.

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.