10 Best Wall AC Units 2025 in the United States

The Keystone 12,000 BTU Wall Mounted AC Unit is designed to efficiently cool medium-sized rooms up to 550 sq. ft., making it a suitable option for bedrooms, bathrooms, and nurseries. One of its strong points is the high cooling capacity, ensuring a comfortable environment even during hot days. It also functions as a dehumidifier, removing up to 2.5 pints of moisture per hour, which is an added benefit for humid climates. The AC unit features a programmable timer, three cooling modes, three fan speeds, and four-way adjustable air louvers, allowing for versatile and customizable usage.

The remote control with an LCD screen provides convenience, adjusting the temperature based on the room's conditions every three minutes for accurate cooling. However, it is worth noting that the unit has a noise level of 60.5 dB, which might be noticeable in quieter settings. Additionally, while it has an energy efficiency ratio (EER) of 10.5 and modes like 'Energy Saver' and 'Sleep' to help reduce electricity usage, it is not Energy Star rated, which may be a consideration for those particularly focused on energy efficiency.

The installation is designed to save space, preserving window views and floor space, and comes with a universal trim kit for ease of setup. The unit is backed by a 1-year parts and labor warranty, with an additional 4 years for the sealed system, providing some peace of mind for buyers. This AC unit offers strong cooling performance and useful features, with some trade-offs in noise and energy efficiency.

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.