10 Best Air Conditioner Covers 2025 in the United States

The COSFLY Indoor Air Conditioner Cover is designed to fit most window or wall-mounted AC units measuring up to about 25 x 16 x 3 inches. It’s made from a polyester/cotton blend, which is decent for indoor use but not water resistant, so it won’t protect your AC from moisture or outdoor weather. This cover is great for blocking cold drafts inside your home during winter, which can help reduce heating costs by preventing air leaks through the AC unit. Its lightweight fabric also helps keep dust and small debris out of your unit when it's not in use.

Installation is very simple—no tools needed. The cover slips over the AC with an elastic band in front and adjustable drawstrings on the sides for a snug fit, making it easy to put on or remove as needed. A small opening is thoughtfully included for the power cord, so you don’t have to awkwardly tuck it away.

While this cover offers good protection indoors and can save energy during colder months, the lack of water resistance means it is not suitable for outdoor or damp areas. It also does not have special ventilation features, so air circulation could be limited if left on too long while the unit runs. This cover is ideal for anyone looking to keep their indoor AC clean and draft-free during off-seasons, especially in climates with cold winters. For protection against rain or moisture, a water-resistant option would be more appropriate.

The ULTCOVER Waterproof Square Air Conditioner Cover is designed to fit outdoor AC units up to 32 inches wide and deep, with a height allowance of up to 36 inches, making it suitable for many standard-sized units. Its 600D polyester canvas with a waterproof backing is a strong material choice that effectively shields your AC from rain, snow, hail, dust, leaves, and even bird droppings, ensuring good weather resistance. A key strength is its well-placed air vents that allow airflow to prevent moisture buildup, which helps protect the unit while keeping the cover from ballooning in strong winds.

The inclusion of handles on the sides aids in easy handling and installation. Securing the cover is straightforward thanks to snap closures, plastic clips, and elastic draw cords that help keep it firmly in place during bad weather. The full coverage design also protects the unit from sun exposure, helping maintain its appearance and condition over time. The cover is a single color (brown), which might not suit all tastes or outdoor decors. While it is made to fit units up to specified dimensions, users with larger or irregularly shaped AC units would need to look for different options.

Weighing just over 4 pounds, the cover balances sturdy material and manageable weight. For those seeking a reliable and easy-to-use cover that protects outdoor AC units from harsh weather and environmental debris, the ULTCOVER presents a strong option.

The Mrrihand Central Air Conditioner Cover is designed to fit most standard square air conditioner units up to 24"x24"x30". One of its key strengths is its heavy-duty, waterproof 420D Polyester Oxford material, which provides robust protection against rain, snow, dust, sun, debris, and hail, making it suitable for all seasons. The windproof design, featuring elastic hem cords and air vents, helps it stay securely in place during windy days while promoting airflow to prevent moisture buildup and keep the unit dry.

Ease of use is another highlight, with Velcro openings and a padded handle for straightforward installation and removal. Additionally, a storage bag is included for convenient storage and portability. However, users need to ensure they measure their AC units carefully and choose a cover size slightly larger than their units for the best fit. While the product is easy to clean with water or mild soap, it should not be machine washed.

This air conditioner cover is ideal for those looking for durable and comprehensive year-round protection for their outdoor AC units.