10 Best Ultra Quiet Air Conditioners 2025 in the United States

The Midea Duo 14,000 BTU portable air conditioner is a solid choice for those needing quiet, efficient cooling in medium-sized rooms up to 550 sq. ft. It stands out with a very low noise level of 42 dB, which is about as quiet as a library, making it ideal for bedrooms or living areas where peace is valued. The dual hose-in-hose design enhances air circulation by pulling in and exhausting air outside, improving cooling efficiency and preventing hot air leaks indoors. This, combined with inverter technology, helps it use about 40% less electricity than typical portable AC units, which is a big plus for energy savings. With a SEER rating of 8.9, it is reasonably efficient but not the highest in class, so some rivals could be a bit more cost-effective to run. The unit supports smart controls via a mobile app and voice assistants like Alexa and Google, adding convenience and modern usability.

It includes multiple fan speeds and a sleep mode for comfort and quiet operation during the night. Being portable, it offers flexible installation without permanent mounting, but it weighs 75 pounds, which is fairly heavy for a portable unit. The 14,000 BTU cooling power is strong enough for rooms up to about 550 sq. ft., suitable for many homes or offices. On the downside, it lacks a BEE Star Rating which might be important depending on your location, and some users have noted the included window kit installation can be tricky. The dust filter is a useful feature to keep air clean.

This air conditioner blends quiet, efficient performance with smart features, making it well-suited for users who prioritize low noise and portable use in medium-sized rooms.

The LG 10000 BTU Smart Wi-Fi Enabled Window Air Conditioner is designed for those who value quiet operation, with a noise level as low as 53 dB. This makes it a strong choice for bedrooms or offices where minimal noise is crucial. It effectively cools rooms up to 450 square feet and offers multiple fan speeds, allowing you to customize the airflow to your liking. The unit also features LG ThinQ technology, which enables remote control via a smartphone app or voice commands through Alexa and Google Assistant, adding convenience to its list of benefits.

The auto-restart function ensures that the unit will resume operation after a power outage, which is a useful feature for maintaining consistent comfort. Additionally, it comes with a washable filter, making maintenance relatively easy. The air conditioner uses eco-friendly R32 refrigerant, which is a plus for environmentally conscious users. However, it does not have an Energy Star rating, which might be a drawback for those particularly focused on energy efficiency.

At 57 pounds, it may also be a bit cumbersome to install without assistance. The SEER rating of 11.4 is decent but not the highest available. Priced competitively, this LG model is a practical option for those looking for a quiet, smart air conditioning solution, although those needing the utmost energy efficiency might look elsewhere.

The LG 10000 BTU Portable Air Conditioner is designed to cool medium to large rooms up to about 450 square feet, making it suitable for spaces like basements, attics, or single rooms. One of its strong points is the inverter technology that helps it save up to 40% more power compared to regular non-inverter models, which is great if you're looking to reduce electricity costs. It operates quietly at around 44 decibels in sleep mode, which is quite low and ideal for nighttime use without disturbing your rest.

The unit offers multiple functions including cooling, fan-only, and dehumidifying modes, providing flexibility depending on your needs. You can also control it remotely through the LG ThinQ app, adding convenience especially when you're not at home. Installation-wise, it comes with a window kit and necessary accessories to set it up as a portable unit, so it doesn’t require complicated installation or permanent mounting.

Its energy efficiency ratio (SEER 7.9) is decent but not the highest in its class, and it is not Energy Star certified, which means it might consume more power than some other models. At about 44 dB, it is quiet but not the absolute quietest available. The unit is fairly heavy at 71 pounds, so moving it around could require some effort. This LG air conditioner is a reliable choice if you want a balance of quiet operation, effective cooling, and smart control for medium to large rooms without complex installation.