10 Best Quiet Air Conditioners 2025 in the United States

The Daikin 18,000 BTU 2-Zone Mini Split is a solid choice if you're looking for a quiet and energy-efficient air conditioner that can cool and heat two separate spaces independently. With a very low noise level of just 24 decibels, it operates quietly enough to be unobtrusive in bedrooms, living rooms, or offices. It has a good cooling capacity of 18,000 BTU (or 1.5 tons), making it suitable for areas up to around 800 square feet, and the included heat pump provides reliable heating down to 5°F, so it works well year-round. The system is energy-efficient with a high SEER rating of 21 SEER2 and an EER of 12, helping to keep your electricity bills in check.

The unit comes with remote controls for each indoor fan coil, plus smartphone app and voice control options, which gives you convenient ways to adjust settings like fan speed, temperature, and timer. The programmable timer and multiple fan speeds offer good flexibility to customize airflow and comfort. Its R-32 refrigerant is more environmentally friendly, which is a nice bonus. Installation includes all necessary kits and brackets, but because it's a mini split system, professional installation is recommended.

This model is not Energy Star rated, which might matter if you prioritize certified energy savings. Also, while noise is very low, the product's physical dimensions listed seem minimal, which might be a data entry error but worth confirming. It carries a premium price tag, partly due to its advanced features and 12-year warranty. The Daikin mini split is ideal if you want efficient, quiet, and customizable cooling and heating for two rooms without ductwork, but it may be more than needed for very small spaces or those on a tight budget.

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.