10 Best Through-The-Wall Air Conditioners 2025 in the United States

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 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 10,000 BTU Through the Wall Air Conditioner is designed for efficient cooling of spaces up to 440 square feet, making it suitable for bedrooms, living rooms, and small apartments. With an Energy Efficiency Ratio (EER) of 10.7, it offers decent energy savings, although it doesn't have an Energy Star certification. The unit includes a remote control and features three cooling speeds, three pre-programmed modes, and a turbo fan for versatile cooling options.

The Energy Saver mode adds a layer of efficiency by maintaining the desired temperature with minimal energy use. Its installation is straightforward with a plastic trim kit and protective mesh grille, although it’s only suitable for wall installation, not for windows. The air conditioner runs at 60 dB, which is moderately noisy and might be noticeable in quieter environments.

Additional features include a washable, reusable filter, insulation foam, and a dehumidifying capacity of 2.9 pints per hour, which is useful for humid climates. While its dimensions (24 x 20.1 x 14.4 inches) and weight (77 pounds) may require some effort during installation, the unit's performance and ease of use make it a solid choice for those looking for a reliable wall-mounted air conditioner. Potential buyers should consider the noise level and ensure their wall setup is compatible with this unit.