10 Best Through-The-Wall Air Conditioners 2026 in the United States

The LG 9,800 BTU Through-the-Wall Air Conditioner with Supplemental Heat is designed for rooms up to 440 square feet, such as bedrooms or offices. It offers both cooling and heating functions, making it versatile for different weather conditions. With multiple fan speeds, users can customize airflow efficiently. The unit includes convenient features like a digital control panel, remote control, and auto-restart after power failures.

Its 4-way air deflection enhances flexibility, and it comes with a filter light reminder, trim kit, and washable filter for ease of maintenance. The unit's Seasonal Energy Efficiency Ratio (SEER) of 9.8 is not particularly high, indicating that it may not be the most energy-efficient option. Additionally, it operates at a noise level of 54 dB, which might be noticeable in quieter settings.

It requires a 230-volt outlet and is relatively heavy at 70 pounds, which could make installation challenging. Despite these drawbacks, its ability to cool medium-sized rooms effectively and additional heating feature make it a practical choice for users seeking a multi-functional air conditioning solution.

The LG 14,000 BTU through-the-wall air conditioner is designed to cool medium-sized rooms up to 700 square feet, making it suitable for bedrooms, living rooms, apartments, or offices. Its cooling power is strong enough to keep spaces comfortable during warm months. The unit features three fan speeds and an auto-cool mode, letting you adjust airflow to your liking. The 4-way air deflection allows you to direct air where it’s needed most.

With an Energy Efficiency Ratio (EER) of 9.3, it offers decent energy savings, though not the highest on the market. This model operates quietly at 58 decibels, which is about the sound of a normal conversation, so it won't be too disruptive. Installation requires a specific wall sleeve and a 230/208V power supply, so it's important to ensure your wall and electrical setup can accommodate this. The air conditioner comes with a user-friendly digital control panel and remote, plus helpful features like a filter light reminder, washable filter, and an auto-restart function after power outages—these add convenience and ease of maintenance. Additionally, it includes a 24-hour timer to help manage energy use.

One downside to consider is its size (about 20 x 24 x 14 inches and 77 pounds), which may need a proper through-the-wall space and professional installation. Its 1-year warranty covers parts and labor, giving some peace of mind. This LG model is a good fit for those looking to cool medium rooms with a balance of good performance, useful features, and manageable noise, though compatibility with your wall and electrical setup should be confirmed beforehand.

The LG 11,800 BTU Through the Wall Air Conditioner is designed for those needing to cool a space up to 530 square feet, such as a bedroom, living room, or apartment. With a cooling capacity of 11,800 BTUs, it offers robust cooling performance. One of its notable strengths is its energy efficiency, with an EER of 10.6, which means it effectively cools while saving on energy costs.

Additionally, it uses R-32 refrigerant, which is more environmentally friendly compared to older refrigerants. The unit is designed specifically for through-the-wall installation, so it won’t fit standard windows, but its universal design means it is compatible with most wall sleeves, adding to its versatility. The product dimensions are 24 inches wide, 20.1 inches deep, and 14.4 inches high, so it’s important to check if it fits your existing wall sleeve or the space you plan to install it in.

In terms of noise, it operates at 66 decibels, which might be noticeable but isn't overly disruptive for most users. The unit offers three cooling speeds and three pre-programmed modes - Energy Saver, Dry, and Cool - providing flexibility based on your needs. Additional features include a remote control for convenience, a washable and reusable filter, insulation foam, and a trim kit for a clean indoor installation. However, it is worth noting that despite its energy efficiency, this model is not Energy Star certified. It also weighs 76 pounds, which might make installation challenging without assistance.