10 Best Through Wall Air Conditioning Units 2026 in the United States

The LG 11,800 BTU through-the-wall air conditioner is designed to cool spaces up to about 440 square feet, making it suitable for medium-sized rooms like bedrooms, living rooms, or apartments. Its cooling capacity of 11,800 BTUs (or 0.9 tons) provides solid performance for keeping a typical room comfortable during warm days. With an energy consumption of around 1080 watts and Energy Star certification, this unit offers decent energy efficiency that can help manage electricity costs compared to less efficient models. It operates on a 230/208V power supply, which is common for through-wall units, but users should ensure their home wiring supports this voltage.

The air conditioner includes a remote control and offers three cooling and fan speeds, allowing easy adjustment of airflow and temperature from across the room. Installation requires a compatible wall sleeve, so it is important to verify measurements before purchase to ensure proper fit. A drawback is the limited 90-day warranty, which is shorter than many competitors offer, potentially affecting peace of mind.

This LG unit is well suited for someone needing a reliable, moderately powerful through-the-wall AC with energy efficiency and remote control convenience, though buyers should check installation requirements carefully and consider the short warranty period.

The Keystone 14,000 BTU Wall Mounted Air Conditioner is a solid choice for cooling and supplemental heating in large rooms up to 700 sq. ft. Its impressive 14,000 BTU cooling capacity ensures efficient temperature control, while the 10,600 BTU supplemental heating capacity offers versatility for year-round use, though it should not be relied on as the primary heat source. One of its strengths is the smart remote control, which adjusts cooling based on the room temperature, adding convenience to its operation. Additionally, its energy-saving modes like 'Energy Saver' and 'Sleep' can help reduce electricity bills.

However, its Seasonal Energy Efficiency Ratio (SEER) of 9.3 is on the lower end, indicating it may not be as energy-efficient as some other models. Moreover, this unit is not Energy Star rated, which could be a consideration for those prioritizing high energy efficiency. In terms of noise level, it operates at 61.5 dB, which is relatively quiet for its capacity but may still be noticeable in quieter settings.

The installation is straightforward with the included trim kit, and it requires a 230V/20-amp outlet, which may necessitate additional electrical work if not already available. The unit’s dimensions (20.3 x 24.2 x 14.5 inches) are typical for through-wall air conditioners, ensuring compatibility with most wall sleeves. Additional features like the dehumidifier and filter light reminder enhance its functionality. The Keystone 14,000 BTU wall AC is well-suited for large living areas, offering powerful cooling and heating with practical bonuses, though its energy efficiency might be a drawback for some users.

The Whirlpool 12,000 BTU through-the-wall air conditioner is designed to cool rooms up to about 550 square feet, making it a solid choice for living rooms, bedrooms, or kitchens. Its cooling power suits medium-sized spaces, offering flexibility with three fan speeds, four operation modes, and directional louvers to spread cool air effectively. This unit features a digital display, remote control, and a 24-hour timer, allowing easy and customizable operation.

Energy-wise, it has a Seasonal Energy Efficiency Ratio (SEER) of 10, which is decent but not outstanding compared to newer inverter models. The noise level sits at 56 decibels, somewhat noticeable but typical for through-the-wall units, which might be a bit loud for very quiet environments. It fits standard wall sleeves between 24.5 and 27 inches wide and includes a trim kit for a clean installation look. Additional perks include a built-in dehumidifier and a washable, easy-to-access filter, which helps maintain air quality and unit efficiency.

The unit lacks inverter technology, so it may use more power than modern energy-saving units, and the noise might be a drawback for some users. Weighing nearly 70 pounds, installation may require professional help. Covered by a 4-year limited warranty and backed by a reputable brand, this model is suitable for those seeking reliable, straightforward cooling with useful features but without the latest energy efficiencies or ultra-quiet operation.