10 Best Quiet Wall Air Conditioners 2025 in the United States

The LG LW1424RD is a solid choice if you need a window air conditioner for a medium to large room, cooling up to around 800 square feet. With a cooling capacity of 14,000 BTU, it is powerful enough for spaces like living rooms or large bedrooms. One of its strengths is the relatively quiet operation at 56 decibels, which means it won't create distracting noise while running. It offers three fan speeds and an auto cool feature, giving you some flexibility to adjust comfort levels easily. Energy-wise, it has a Seasonal Energy Efficiency Ratio (SEER) of 11.2, which is decent but not the most efficient available. This means it won't be the cheapest to run long-term, but it balances performance and energy use fairly well.

Installation is straightforward since it is a window unit, and it comes with helpful features like an easy-to-clean washable filter and a check filter alert, reducing maintenance hassle. The included remote control and a 24-hour timer add convenience, allowing you to program cooling times or control the unit from across the room. It also has an auto-restart feature that turns the AC back on after a power outage, which can be a practical benefit.

The noise level, while quiet for its class, might still be noticeable if you’re very sensitive to sound or need ultra-quiet operation. The unit also weighs 82 pounds, so installation might require two people. Additionally, it lacks a higher energy star rating, which could be a factor if you prioritize lower electricity bills or environmental impact. This model is well suited for users looking for a reliable, medium-large room window air conditioner with good cooling power and useful features, without requiring advanced installation or high-end energy performance.

The Keystone 14,000 BTU Wall Mounted Air Conditioner is a powerful unit capable of cooling spaces up to 700 square feet, making it suitable for large rooms such as bedrooms, garages, and nurseries. It boasts three cooling modes, three fan speeds, and four-way adjustable air louvers, allowing for customized comfort. Additionally, it acts as a dehumidifier, removing 2.9 pints of moisture per hour, which is beneficial for humid environments.

The unit is energy-efficient, featuring 'Energy Saver' and 'Sleep' modes to help reduce electricity consumption, although it does not have an Energy Star certification. The included remote control is smartly designed to measure and display the room temperature, ensuring precise cooling control. Installation is straightforward with the universal interior trim kit, but it requires a special 230-volt/20-amp outlet, which might not be present in all homes.

While the noise level is 61.3 dB, making it relatively quiet compared to other units in its category, it might still be noticeable in very quiet environments. The product dimensions are compact, saving floor space while maintaining window views. Users have rated it 4.1 out of 5 stars, indicating general satisfaction with its performance. However, some users might find the noise level and lack of an Energy Star rating to be minor drawbacks. This unit appears to be a reliable and efficient choice for those needing significant cooling capacity in large rooms.

The Keystone 8,000 BTU Through the Wall Air Conditioner is designed for small to medium-sized rooms up to 350 square feet, making it suitable for bedrooms, bathrooms, and nurseries. Its noise level of 51.8 dB is relatively quiet, which is beneficial for maintaining a peaceful environment. The unit also has an Energy Efficiency Ratio (EER) of 10.6, which, while not outstanding, is decent for energy savings.

Additionally, it features three cooling modes, three fan speeds, and four-way adjustable air louvers, offering customizable comfort. The built-in dehumidifier removes 2.1 pints of moisture per hour, adding to the comfort factor by controlling humidity levels. Installation is straightforward with the included universal trim kit, and the unit’s through-the-wall design helps save space compared to traditional window units.

However, it is not Energy Star certified, so it might not be the best choice for those prioritizing maximum energy efficiency. The smart remote control is a convenient feature, adjusting cooling based on the room temperature and promoting energy-efficient operation with 'Energy Saver' and 'Sleep' modes. One year parts and labor warranty plus four additional years for the sealed system provides decent coverage. This device is a solid option for those needing a space-saving, relatively quiet AC unit with a good range of features, but it may not be the top performer in energy efficiency.