10 Best Wall AC Units 2025 in the United States

The LG 7,800 BTU through-the-wall air conditioner is designed for cooling medium-sized rooms up to about 330 square feet, making it a solid choice for bedrooms or small offices. Its cooling power matches this room size well, offering sufficient comfort without being over or underpowered. One of its strengths is the energy efficiency, with an Energy Efficiency Ratio (EER) of 10.7, thanks to the modern R-32 refrigerant. This means it uses power reasonably well, although it is not Energy Star certified, so there may be more efficient options if energy savings are your top priority. Noise level sits at 56 decibels, which is moderate—not too loud but noticeable, especially in quiet environments like bedrooms.

It features three cooling and fan speeds, including an Energy Saver mode that helps reduce electricity use by cycling the compressor and keeping the fan running to circulate air. Installation is specific to through-the-wall setups, so it won’t fit standard window spaces; however, the included trim kit and grille make it straightforward to install and maintain, with easy access to a washable filter. The remote control adds convenience, allowing you to adjust settings from across the room. The unit also offers a filter light reminder and a basic dehumidifier function, which can improve comfort during humid days.

Weighing 66 pounds, it is reasonably manageable during installation, but professional help might be needed to ensure proper wall fitting. A 1-year warranty covers parts and labor, which is standard but somewhat limited. This LG wall AC unit represents a practical and efficient option for those needing reliable cooling in a specific wall-mounted setup, balancing comfort, energy use, and features without being the quietest or most advanced model available.

The TCL H12T9XH is a through-the-wall air conditioner designed for rooms up to about 550 square feet, offering 12,000 BTU cooling and 8,600 BTU heating. This makes it a versatile choice for year-round comfort, whether you need to cool down or warm up your space. Its energy efficiency, marked by a Seasonal Energy Efficiency Ratio (SEER) of 9.7, is decent but not outstanding, which means it won’t be the cheapest to run compared to more efficient models. Noise level is around 50 decibels, about the sound of a quiet conversation, so it’s not the quietest AC but shouldn’t be overly disruptive.

One useful feature is its built-in dehumidifier which helps reduce moisture and improve air quality, especially in humid climates. The unit also supports smart home integration, working with Alexa and Google Assistant, allowing convenient voice control or remote operation via an app. Installation requires a compatible wall sleeve (not included), with dimensions provided, so some preparation and possibly professional help will be needed. Maintenance should be straightforward but keep in mind the 1.6-pint water capacity from the dehumidifier might require occasional emptying depending on humidity levels.

The unit comes with a remote, LED display, sleep mode, and a one-year warranty. This TCL model suits users looking for a mid-power wall AC with heating, smart features, and dehumidifying capabilities, though it may not be the quietest or the most energy-efficient option available.

The Keystone 8,000 BTU Wall Mounted Air Conditioner is designed for small to medium rooms up to 350 sq. ft., providing reliable cooling with a decent 8,000 BTU capacity. It also offers supplemental heating (4,200 BTU), which is useful in mild cold weather but shouldn’t replace a main heater. The unit comes with helpful features like a dehumidifier, fan mode, and a remote control that adjusts temperature readings from your current spot, adding convenience.

Its Seasonal Energy Efficiency Ratio (SEER) is 9.6, indicating reasonable energy efficiency, especially with energy saver and sleep modes to help reduce electricity usage. Noise-wise, it runs at about 57 dB, which is noticeable but generally not disruptive for most users. Installation is straightforward with a wall mounting kit included, saving window space and keeping your view clear. Maintenance is also easier thanks to a filter light reminder and washable mesh filter.

One drawback is that it may not be the best fit for rooms larger than 350 sq. ft. or for users needing a strong heating solution in colder climates. It is a good pick for those seeking a compact, multi-function unit that cools quietly and adds some heating and dehumidifying benefits without complicated setup.