10 Best Wall AC Units 2025 in the United States

The LG 7,800 BTU through-the-wall air conditioner is designed for cooling medium-sized rooms up to about 330 square feet, making it a solid choice for bedrooms or small offices. Its cooling power matches this room size well, offering sufficient comfort without being over or underpowered. One of its strengths is the energy efficiency, with an Energy Efficiency Ratio (EER) of 10.7, thanks to the modern R-32 refrigerant. This means it uses power reasonably well, although it is not Energy Star certified, so there may be more efficient options if energy savings are your top priority. Noise level sits at 56 decibels, which is moderate—not too loud but noticeable, especially in quiet environments like bedrooms.

It features three cooling and fan speeds, including an Energy Saver mode that helps reduce electricity use by cycling the compressor and keeping the fan running to circulate air. Installation is specific to through-the-wall setups, so it won’t fit standard window spaces; however, the included trim kit and grille make it straightforward to install and maintain, with easy access to a washable filter. The remote control adds convenience, allowing you to adjust settings from across the room. The unit also offers a filter light reminder and a basic dehumidifier function, which can improve comfort during humid days.

Weighing 66 pounds, it is reasonably manageable during installation, but professional help might be needed to ensure proper wall fitting. A 1-year warranty covers parts and labor, which is standard but somewhat limited. This LG wall AC unit represents a practical and efficient option for those needing reliable cooling in a specific wall-mounted setup, balancing comfort, energy use, and features without being the quietest or most advanced model available.

The Keystone 14,000 BTU Wall Mounted Air Conditioner is designed to efficiently cool and heat large spaces up to 700 square feet. This dual-function unit offers 14,000 BTUs of cooling power and 10,600 BTUs of supplemental heating, making it suitable for year-round use. It also features a dehumidifier and fan circulation, providing a comprehensive climate control solution. One of its advantages is the space-saving design, which allows for easy wall installation and keeps windows and floors clear.

The unit comes with a smart remote control that displays the room temperature and sends signals to the AC every three minutes for precise cooling. It also includes an 'Energy Saver' mode to help reduce electricity costs. However, it's worth noting that the supplemental heating is not intended to be the primary heat source and is effective only when outdoor temperatures range between 23 and 76 degrees Fahrenheit. While the Seasonal Energy Efficiency Ratio (SEER) is 9.3, it is not Energy Star certified, which might be a consideration for those prioritizing energy efficiency.

The noise level is 61.5 dB, which is relatively moderate but might be noticeable in quieter environments. Installation requires a special 230-volt/20-amp electrical outlet, and the included trim kit facilitates setup. Additional features like a filter light reminder and a 1-year parts and labor warranty (plus an extra 4 years for the sealed system) add to its convenience and reliability. This unit is best suited for users looking for a multifunctional AC with heating capabilities for large rooms, though those seeking a primary heating source or higher energy efficiency might want to consider other options.

The Keystone 12,000 BTU Wall Mounted AC Unit is designed to cool medium-sized rooms up to about 550 square feet, making it a solid choice for bedrooms, bathrooms, or small living spaces. With a respectable cooling capacity of 12,000 BTU, it can efficiently lower the temperature in these areas. The unit has a Seasonal Energy Efficiency Ratio (SEER) of 10.5, which is decent for balancing performance with electricity costs, and includes energy-saving modes like 'Energy Saver' and 'Sleep' to help reduce power usage further. Noise level is moderate at 56.5 dB, which means it’s noticeable but generally not disruptive for everyday use or sleep in a bedroom.

This air conditioner also features 3 cooling modes and fan speeds, plus 4-way adjustable louvers to direct airflow where you want it. It removes moisture effectively, dehumidifying 2.5 pints per hour, which adds to comfort, especially in humid climates. Installation is relatively straightforward with the included universal trim kit, allowing it to fit in standard wall openings without blocking windows or floor space. The remote control is a convenient addition, offering temperature readings and control from across the room.

Compared to some competitors, it may lack a higher star energy rating and is somewhat heavier at over 78 pounds, meaning installation might need professional help. The warranty covers parts and labor for 1 year, with additional coverage for the sealed system up to 5 years, which adds peace of mind. This Keystone wall unit balances solid cooling power, user-friendly features, and energy efficiency, making it a practical option for those needing a reliable and space-saving cooling solution for medium-sized rooms, though quieter or more energy-efficient models are available if those are top priorities.