10 Best In Wall Ac Units 2025 in the United States

The Keystone 8,000 BTU Wall Mounted Air Conditioner is a versatile unit designed for small to medium-sized rooms up to 350 square feet. With its 8,000 BTU cooling capacity and 4,200 BTU supplemental heating capacity, it provides year-round comfort. This unit stands out with its multi-functional features: it cools, heats, dehumidifies, and circulates air using a fan. However, it’s important to note that the heating mode is supplemental and not intended as the primary heat source, especially in very cold conditions (below 23 degrees).

The energy efficiency ratio (EER) of this unit is not explicitly mentioned, but it offers energy-saving modes such as 'Energy Saver' and 'Sleep', which can help reduce electricity costs. The noise level is rated at 57 dB, which is relatively quiet but may still be noticeable to some users. Installation is made easier with the included interior trim kit, and its wall-mounted design is great for saving floor space and keeping windows unobstructed. The smart remote control is a convenient feature, allowing you to monitor and adjust the temperature from anywhere in the room.

Additional features include a filter light reminder and a 1-year parts and labor warranty, plus an additional 4 years for the sealed system. One downside is that the unit is not Energy Star certified, which might be a consideration for those looking for highly energy-efficient appliances. Also, at 65 pounds, it may require assistance during installation. This unit is best suited for users looking for a multi-functional, space-saving solution for small to medium rooms, with the added benefit of a remote control.

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 7,800 BTU Through the Wall Air Conditioner is designed for cooling rooms up to 330 square feet, making it a good choice for bedrooms or offices. Its cooling capacity is sufficient for moderate-sized spaces. The energy efficiency ratio (EER) of 10.7, paired with the use of R-32 refrigerant, makes it a relatively efficient option, although it is not Energy Star rated.

This unit operates at 115 volts and requires through-the-wall installation, not suitable for window mounting, so ensure your space can accommodate this setup. Installation aids like a plastic trim kit and foam insulation are included, which can simplify the process somewhat. At 56 dB, the noise level is moderate, which might be noticeable but generally acceptable for residential use.

Its remote control and multiple cooling speeds add convenience and customization to its use. Additional features like a filter light reminder and dehumidifier function enhance its value. However, the absence of an Energy Star rating might be a drawback for those prioritizing top-tier energy savings. Additionally, while the remote control is convenient, the unit does not include batteries, requiring an extra purchase. This AC unit is relatively heavy at 66 pounds, which could complicate installation for some users. If you're looking for an efficient and practical solution for cooling a specific room without needing a window installation, this LG unit is worth considering.