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 BLACK+DECKER 18000 BTU window or through-the-wall air conditioner is designed to cool spaces up to 1,000 square feet, making it suitable for larger rooms, apartments, or small offices. The 18,000 BTU cooling capacity ensures it can handle significant heat loads effectively. It offers four cooling levels, including an auto mode, allowing flexible temperature control to match your comfort needs. The noise level is around 54.5 decibels, which is moderate for an air conditioner of this size—quiet enough for most living areas but may be noticeable in very quiet rooms.

Its energy efficiency is decent with a Seasonal Energy Efficiency Ratio (SEER) of 11.8, balancing performance with power consumption. Installation is versatile since it can be mounted in a window or through the wall, though through-the-wall installation requires professional help, which could add to setup costs. The unit also comes with a remote control and useful features like sleep mode, energy saver, and a 24-hour timer, enhancing convenience and potential energy savings. The included mounting hardware and wall sleeve simplify window installation, making it fairly user-friendly.

The product doesn’t have a BEE star rating, which might be important if you're looking specifically for highly energy-efficient units recognized in some regions. The 1-year warranty on labor and parts, with 5 years on the compressor, is fairly standard, though servicing might be limited to manufacturing defects. This BLACK+DECKER air conditioner is a solid choice for strong, reliable cooling in large spaces and offers extra convenience features, though it may not be the quietest option available.

The Daikin CIRRA Series 2-Zone Mini Split Air Conditioner offers a flexible and efficient solution for cooling and heating multiple areas in your home. With a combined cooling capacity of up to 17,500 BTU and heating capacity of up to 18,000 BTU, this system is suitable for spaces like master bedrooms, living rooms, basements, attics, and garages. The unit boasts a Seasonal Energy Efficiency Ratio (SEER) of 17.00, which indicates good energy efficiency, though it is not Energy Star compliant.

The system operates at a noise level of 51 dB, which is relatively quiet, making it a suitable option for living spaces where noise sensitivity is a concern. Installation is made easier with the included 15-ft installation kit and wall bracket, although professional installation may still be required due to its complexity. Some standout features include an anti-corrosion treatment on the heat exchanger, a quick warming function, automatic defrosting, and an Eco+ mode for energy savings.

A notable drawback is its weight, at 167 pounds, which might make installation more challenging. Another point to consider is that it is not Energy Star compliant, which may be a downside for those looking for the highest energy efficiency standards. Despite these minor issues, this unit is ideal for those looking for a reliable and efficient way to manage the temperature in larger spaces or multiple rooms.