10 Best Thru Wall Ac Units 2026 in the United States

The Keystone 18,800 BTU Window-Wall Air Conditioner is a versatile unit that combines cooling, supplemental heating, dehumidification, and fan circulation, making it suitable for large rooms up to 1,000 square feet. With a cooling capacity of 18,800 BTUs and a supplemental heating capacity of 16,000 BTUs, it can provide comfort year-round. The unit includes a smart remote with an LCD screen that helps maintain the desired room temperature by sending signals to the air conditioner every three minutes. It offers energy-saving modes like 'Energy Saver' and 'Sleep' to help reduce electricity bills, although its SEER rating of 10.7 is relatively average, and it is not Energy Star certified.

The noise level is 55 dB, which is moderate and may not be the quietest option available but should be manageable for most users. Installation is straightforward with the included window installation kit, and the space-saving design helps free up floor space. Additional features include a filter light reminder and a 4-way swing for better air distribution. However, it weighs 117.3 pounds, making it quite heavy and potentially challenging to install without assistance.

While it performs well in cooling and supplemental heating, it’s important to note that the heating function is not meant to replace a primary heat source, especially in extremely cold conditions. The product comes with a 1-year parts and labor warranty and an additional 4-year warranty for the sealed system, providing some peace of mind regarding durability.

The LG 11,800 BTU through-the-wall air conditioner is well suited for cooling medium-sized rooms up to around 530 square feet, making it a good fit for bedrooms, living rooms, or apartments. Its cooling power is strong enough to keep these spaces comfortable on warm days. The unit uses an energy-efficient R-32 refrigerant with an Energy Efficiency Ratio (EER) of 10.6, which helps reduce electricity costs compared to less efficient models, although it doesn’t have the Energy Star certification to guarantee top-level efficiency.

Noise level is at 66 decibels, which is a bit louder than some quieter models, so it might be noticeable in very quiet settings like bedrooms at night. Installation requires a through-the-wall sleeve, and the unit won’t work in standard window frames. It comes with a universal design to fit most wall sleeves and includes helpful accessories like a trim kit, filter, insulation foam, and a remote control, making the setup somewhat easier. The unit offers three cooling and fan speeds plus multiple modes, including Energy Saver and Dry modes, which help manage humidity and save power by cycling the compressor off when the set temperature is reached.

The product weighs 76 pounds, so installation might require professional help. The 1-year limited warranty provides some peace of mind but is fairly standard. This LG air conditioner is a solid choice if you need reliable cooling through a wall installation for medium spaces and want some energy savings, but it may be a bit noisy and installation could be challenging without assistance.

The LG 10,000 BTU Through the Wall Air Conditioner is designed to effectively cool spaces up to 440 square feet, making it a solid choice for bedrooms, living rooms, or small apartments. With an energy efficiency ratio (EER) of 10.7, it utilizes the efficient R-32 refrigerant, which helps keep energy costs manageable while delivering a reliable cooling performance. The unit offers three cooling speeds and additional modes, including Energy Saver and Dry mode, which are beneficial features for maintaining comfort in varying conditions.

Installation is straightforward for those opting for a through-the-wall setup, though it’s important to note that this unit cannot be installed in a standard window frame. The included trim kit and protective mesh grille help ensure a tidy finish and protection for the unit. Additionally, the washable filter is a practical feature that contributes to extended use.

There are some drawbacks to consider. The noise level is rated at 60 dB, which could be noticeable, especially during quiet hours in residential areas. While it has a solid cooling capacity, it doesn’t come with an Energy Star rating, which may be a concern for some consumers focused on efficiency ratings. Furthermore, at 77 pounds, it may require more than one person for installation, particularly for those not accustomed to handling heavier appliances. This air conditioner is well-suited for users needing an efficient, effective cooling solution for medium-sized rooms, provided they are comfortable with the installation process and can manage the noise level.