6 Best Through Wall Air Conditioning Units 2025 in the United States

The OLMO 8,000 BTU Through-the-Wall Air Conditioner is a versatile unit that offers both cooling and heating options, making it suitable for year-round use in residential, commercial, and hotel settings. With a cooling capacity of 8,000 BTUs and a heating capacity of 4,200 BTUs, it is designed to efficiently manage the temperature in medium-sized spaces. The unit operates on 115 volts and comes pre-charged with R-32 refrigerant, which is more environmentally friendly compared to older refrigerants.

The included wall sleeve simplifies installation, and the dimensions (20.28"D x 24.21"W x 14.53"H) ensure compatibility with standard wall openings for through-the-wall units. The noise level is reasonably low at 52 dB, which is comparable to a normal conversation, making it suitable for living areas and bedrooms. However, it is not Energy Star certified, which implies it may not be the most energy-efficient option available. The unit can be controlled via a digital panel with LED display, a remote control, or a compatible wireless smartphone device, adding a layer of convenience.

Weighing 80 pounds, it may require assistance during installation. Additionally, its WiFi capability allows for remote operation, which can be a significant advantage for tech-savvy users. This unit would be particularly beneficial for those looking for a reliable and versatile climate control solution that offers modern features like remote and WiFi control.

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 LG 9,800 BTU Through-the-Wall Air Conditioner is designed to efficiently cool or heat medium-sized rooms up to 450 square feet. Its cooling capacity of 9,800 BTUs and supplemental heating option make it versatile for year-round use. The unit is equipped with two cooling, heating, and fan speeds, allowing users to easily adjust the temperature and airflow to their preference. The electronic controls and included remote enhance usability and convenience, while the auto restart feature ensures the unit resumes operation after a power outage, which is a handy addition.

Measuring 20.09 inches deep, 24 inches wide, and 14.41 inches high, it fits well in standard through-the-wall openings and includes a trim kit for a clean installation. The noise level of 56 dB is moderate, which might be noticeable but not overly disruptive for most users. Additionally, the dehumidifier function is a bonus for those living in humid climates. However, the unit has an Energy Efficiency Ratio (EER) of 9.8, which is not the highest, meaning it may not be the most energy-efficient option available. It is also not Energy Star certified, which might be a consideration for those looking to maximize energy savings.

At an annual energy consumption of 2900 watts, it is relatively efficient but could incur noticeable electricity costs over time. This air conditioner is an excellent option for those needing reliable cooling and heating in a medium-sized space, though more energy-conscious buyers might want to explore other options.