10 Best Wall AC Units 2025 in the United States

The LG 9,800 BTU through-the-wall air conditioner is designed to cool rooms up to about 440 square feet, making it a good fit for bedrooms or small offices. It also offers supplemental heating, providing year-round comfort from one unit. The unit features two fan speeds for both heating and cooling, allowing you some control over airflow. Its noise level is moderate at around 54 dB, which is noticeable but generally not too disruptive in typical home settings.

The energy efficiency ratio (EER) of 9.8 is decent for a wall AC, helping to keep electricity use reasonable, though it's not the highest efficiency you might find. Installation requires a through-the-wall setup and the unit weighs 70 pounds, so professional installation might be needed, but it comes with a trim kit and remote control for easy operation. Maintenance is fairly straightforward with a washable filter and a filter light reminder to help keep the unit clean. Additional features like auto-restart after a power outage and 4-way air deflection add convenience and improved air distribution.

This unit includes a relatively short 1-year warranty and lacks a high Energy Star rating, which might be a consideration if you prioritize long-term durability and top energy savings. It represents a solid, user-friendly option for those needing a reliable heating and cooling wall unit for medium-sized rooms.

The Keystone 14,000 BTU wall-mounted air conditioner is a solid choice for cooling large spaces up to 700 square feet, such as bedrooms, garages, or nurseries. Its cooling capacity is strong enough to handle bigger rooms comfortably. The unit operates on 230 volts and offers a Seasonal Energy Efficiency Ratio (SEER) of 9.3, which means it is reasonably energy-efficient and can help keep electricity costs down, especially with its 'Energy Saver' and 'Sleep' modes. Noise-wise, it runs at about 61.3 decibels, which is noticeable but not overly loud—something to consider if you need a very quiet environment. Airflow is enhanced by 3 fan speeds and adjustable louvers that let you direct the cooled air where you want it most.

Installation requires a special 230-volt outlet and uses a universal trim kit, which simplifies the setup compared to some window units, but you’ll want to ensure your space has the right electrical setup. An added benefit is its built-in dehumidifier, removing about 2.9 pints of moisture per hour, helping keep the air comfortable and less sticky. The included remote control is convenient, with an LCD display that reads the room temperature and updates every few minutes for accurate control. The unit also reminds you when the filter needs cleaning. Weighing around 78 pounds and sized moderately, it doesn’t take up floor or window space, which is great for preserving room aesthetics.

One downside is that the noise level might be a bit high for very quiet spaces like nurseries or bedrooms sensitive to sound. Also, it requires a 230V outlet, which might not be standard in every home, potentially limiting where you can install it. Warranty coverage is decent, with 1 year on parts and labor plus 4 years on the sealed system, providing some peace of mind. This Keystone AC offers reliable cooling, useful energy-saving features, and easy control, making it a good fit for those needing strong, quiet-ish cooling in large rooms, provided their electrical setup matches its requirements.