10 Best In Wall Ac Units 2026 in the United States

The Keystone 12,000 BTU Through the Wall Air Conditioner is designed to cool medium-sized rooms up to about 550 square feet, making it a good fit for bedrooms, nurseries, or bathrooms. Its cooling capacity is solid for these spaces, offering three cooling modes and adjustable fan speeds to customize comfort. The built-in dehumidifier removes about 2.5 pints of moisture per hour, which helps improve air quality and comfort levels. Energy efficiency is decent, with a Seasonal Energy Efficiency Ratio (SEER) of 10.5 and features like Energy Saver and Sleep modes that can help reduce electricity costs. The noise level is moderate at around 56.5 decibels—noticeable but not too disruptive, which is reasonable for a through-the-wall unit.

Installation is straightforward with a universal interior trim kit, saving window space and preserving views, but it requires a proper wall setup and 230V power, so professional installation might be necessary. The included remote control is a nice convenience, featuring a temperature sensor and programmable timer for easy operation. It also has a filter light reminder to help maintain the unit.

The unit is relatively heavy at 78 pounds, which may make installation a bit challenging without assistance. It also lacks a formal energy star rating and is limited to cooling only, with no heating function. For those seeking a dedicated through-the-wall AC unit with reliable cooling, moderate energy use, and useful extras like dehumidification and remote control, this Keystone model is a practical choice—especially if your space matches its coverage and you don’t mind arranging for installation.

The LG 9,800 BTU through-the-wall air conditioner is a solid choice for cooling medium-sized rooms up to about 440 square feet, such as bedrooms or small offices. Its cooling power is suitable for maintaining a comfortable temperature in that space. A useful bonus is the supplemental heating feature, allowing you to warm the room on cooler days without needing a separate heater. The unit offers two fan speeds for both heating and cooling, giving you some control over airflow to match your comfort preferences. Installation requires a wall opening and a 230V power supply, which is typical for in-wall ACs but might need professional help if you aren't handy. Noise level is around 54 dB, which is moderate—noticeable but not overly loud, so it should be okay for bedrooms.

The Energy Efficiency Ratio (EER) is 9.8, which is average but it does not have Energy Star certification, meaning it might use more electricity compared to more efficient models. The included remote control and easy-to-use digital panel make operation convenient, and features like auto-restart after power outage and a washable filter add to ease of maintenance. Due to the unit’s size and weight (about 70 pounds), installation isn’t a quick DIY job. It also lacks advanced energy-saving features found in newer models. If you want an all-in-one wall unit that cools and heats moderately sized rooms and accept moderate energy performance, this LG model presents a practical option.

The LG 9,800 BTU Through the Wall Air Conditioner is designed for cooling spaces up to 440 sq. ft., making it suitable for bedrooms, living rooms, and apartments. It offers a solid cooling capacity with an EER of 10.7, which indicates decent energy efficiency, and employs R-32 refrigerant, known for being environmentally friendly. However, it does not have an Energy Star certification, which might be a consideration for those looking for the highest energy efficiency standards.

Installation requires a specific NEMA 6-15 230V plug, making it essential to ensure compatibility with existing electrical setups and not suitable for standard window installations. The noise level is 56 dB, which is moderate but might be noticeable in quieter environments. The unit features 3 cooling speeds and 3 pre-programmed modes, including an energy saver mode and dry mode, enhancing its functionality and versatility.

Additional features like a washable filter, remote control, and included trim kit and mesh grille add convenience and ease of use. Despite these positives, the lack of an Energy Star rating and the specialized installation requirements may be drawbacks for some users. This unit is a versatile and effective cooling solution for those with compatible electrical setups and who value additional features and moderate noise levels.