10 Best Through-The-Wall Air Conditioners 2025 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 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.

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.