10 Best Quiet Air Conditioners 2025 in the United States

The Midea 12,000 BTU Smart Inverter Air Conditioner is designed for medium to large rooms up to 550 square feet, offering strong cooling power combined with useful heating and dehumidifying features for year-round comfort. It stands out with its energy efficiency, holding an Energy Star rating and using inverter technology that can save up to 35% on electricity compared to standard models. The unit includes multiple fan speeds and five operating modes (cool, heat, dry, fan, auto), which allow you to tailor its performance to your needs.

A programmable 24-hour timer and remote control, along with smart home compatibility (via app and voice assistants like Alexa and Google), add convenience and flexibility. Noise-wise, it operates quietly enough to not disturb daily activities or sleep, with a noise level around 45 dB in low settings, although the specs mention 58 dB which is still reasonable for a window unit. One limitation is that the heat function won't work in very cold outdoor temperatures below 41°F, so it’s more suited for mild heating needs. Installation fits double-hung windows with specific size requirements, which is common for this product type. Its washable filter and electronic controls make maintenance and use straightforward.

This air conditioner is a strong option for those seeking a quiet, energy-efficient unit that also offers heating and smart control features, particularly suitable for moderate climates.

The Daikin 18,000 BTU Entra R32 Series mini split heat pump stands out for its excellent energy efficiency and strong cooling and heating capacity, making it a great choice for spaces up to 1,000 square feet. With a high SEER2 rating of 18 and an EER of 10.5, it promises lower energy bills compared to many standard units. Noise-wise, it operates quietly at 37 dB, which is comfortable for bedrooms, living rooms, or offices where you want minimal distraction.

It offers multiple fan modes including Dry, Fan, Auto, and Powerful Operation, plus features like ECO+ for extra energy savings and a sleep mode for nighttime comfort. A programmable timer and remote control add convenience, allowing you to set schedules and adjust settings easily. Installation is also simplified with the included Maxwell kit and mounting bracket.

While 37 dB is quiet, there are quieter models available if absolute silence is a priority. Also, the system's 230V requirement means it might need specific electrical setup. This Daikin mini split is well suited for homeowners or renovators looking for an efficient, quiet, and versatile air conditioner with heating capability, particularly in homes where ductwork isn’t practical.

The Amazon Basics 5000-BTU Small Window Air Conditioner is a good choice for cooling small rooms up to 150 square feet, making it suitable for bedrooms or home offices. It offers two fan speeds and seven temperature settings, allowing you to adjust the cooling to your comfort. With a noise level of 56 decibels, it runs quietly enough to not disturb sleep or work, which is important for a quiet air conditioner. It also includes a washable filter that helps keep dust and allergens out of the air, supporting easier maintenance.

Its adjustable window kit fits standard windows, making installation straightforward, though basic tools are needed. On the downside, it lacks a programmable timer and remote control, which means you’ll have to adjust settings manually. The energy efficiency is decent with a SEER rating of 14, helping to keep electricity costs reasonable.

This model covers all the basics and provides efficient cooling for small spaces. However, if you need more advanced features like remote operation or a timer, you might want to consider other models.