10 Best Thru Wall Ac Units 2025 in the United States

The BLACK+DECKER 18,000 BTU thru-wall/window air conditioner is a solid choice for cooling larger rooms or open living areas up to 1,000 square feet. Its cooling power is strong enough to handle bigger spaces comfortably, and it offers multiple fan speeds including an auto mode to adjust cooling based on room conditions. The energy efficiency ratio of 11.8 is decent, meaning it won’t be overly costly to run compared to less efficient units. Noise levels at 54.5 decibels are moderate—noticeable but generally not disruptive for most living spaces.

Installation is versatile since it can be fitted in a window or through a wall using the included sleeve and hardware, though professional assistance is recommended for wall installations to ensure safety and proper fit. Additional features such as a full-function remote, a 24-hour timer, sleep mode, and energy saver mode add convenience and help tailor the unit’s operation to your preferences.

It requires 230 volts, so it’s best suited for homes with compatible electrical wiring. Also, while the unit includes mounting hardware, the relatively heavy weight (about 117 pounds) might make installation more challenging for some users. The build is straightforward, but the warranty is somewhat limited with one year on labor and parts and five years on the compressor only. For those seeking a reliable and efficient AC for medium to large rooms and who don’t mind professional help for wall installation, this BLACK+DECKER model represents a worthy option.

The COSTWAY 12000BTU Mini Split Air Conditioner & Heater is a versatile unit designed for both cooling and heating spaces up to 750 square feet. With a high Seasonal Energy Efficiency Ratio (SEER) of 20.0, it promises excellent energy efficiency, which can lead to lower utility bills. The unit operates relatively quietly at 51 dB, which is generally considered acceptable for residential use, ensuring it won't disrupt your peace and quiet significantly.

The included remote control and multiple modes (auto, cool, dry, heat, and fan) provide flexibility and convenience for year-round comfort. The self-cleaning feature at high temperatures and auto-defrost function contribute to maintaining air quality and system longevity. However, installation must be done by a licensed HVAC installer, which could add to the initial cost and complexity. Additionally, the product uses R32 refrigerant, which is more environmentally friendly but might require specific inquiries about its availability for future maintenance.

With a robust warranty covering parts for 5 years and the compressor for 8 years, this unit offers long-term reliability. Potential buyers should consider the installation requirements and ensure compatibility with their existing setup. This unit is ideal for those looking for an energy-efficient, multi-functional air conditioning solution for medium-sized rooms.

The Keystone 10,000 BTU Through the Wall Air Conditioner is designed for those seeking a reliable cooling solution for small to medium spaces up to 450 square feet. With a cooling power of 10,000 BTUs, it efficiently manages indoor temperatures and doubles as a dehumidifier, removing about 2.3 pints of moisture per hour. Its energy efficiency is supported by an EER, though not Energy Star certified, it offers energy-saving modes like 'Energy Saver' and 'Sleep' to help minimize electricity costs.

Installation is straightforward with a universal trim kit, making it a good choice for maintaining window views and floor space. The included remote control, which measures room temperature and adjusts accordingly, adds a layer of convenience, particularly with its programmable timer and adjustable air louvers. However, at 57.4 dB, its noise level might be noticeable, especially in quieter settings like bedrooms or nurseries.

The Keystone 10,000 BTU AC unit is suitable for those prioritizing effective cooling with added dehumidification in a through-wall installation, making it ideal for apartments or small homes. Its user-friendly features make it accessible, though potential buyers should weigh its noise level and energy efficiency against their personal needs. The durable build and 5-year warranty (1 year for parts and labor, plus 4 additional years for the sealed system) provide peace of mind. However, the substantial weight of 68.2 pounds could be a consideration during installation or if moving the unit is necessary.