10 Best Thru Wall Ac Units 2025 in the United States

The Keystone 12,000 BTU wall-mounted air conditioner is a solid choice for cooling medium-sized rooms up to 550 square feet, such as bedrooms, nurseries, or bathrooms. Its 12,000 BTU cooling capacity should effectively handle spaces of that size, providing reliable temperature control. The unit features a decent Energy Efficiency Ratio (EER) around 10.5, which means it balances cooling power with reasonable energy use. With modes like 'Energy Saver' and 'Sleep,' it can help reduce electricity bills during operation. Noise level sits at about 56.5 decibels, which is fairly typical for wall AC units—quiet enough for bedrooms but not completely silent.

Installation requires a thru-wall setup with a universal trim kit included, which can save window space but may need professional help if you're unfamiliar with wall-mounted ACs. The unit offers useful extras such as a remote control that measures room temperature, 3 cooling modes, adjustable fan speeds, and a built-in dehumidifier that removes about 2.5 pints of moisture per hour, enhancing comfort in humid conditions. Its size is moderate, and the bright white design aims to blend in with most indoor styles.

The 1-year warranty on parts and labor is standard but not extensive, though it includes 4 years on the sealed system. Some users might find the noise level a bit noticeable compared to quieter models, and it doesn't have a high BEE star rating. This AC suits those wanting an efficient, space-saving cooling solution for specific rooms without window installation hassles, who also appreciate features like remote control and dehumidification. For very quiet operation or larger capacity, other options may be preferable.

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.

The Keystone 12,000 BTU through-wall air conditioner is designed to cool medium-sized spaces up to 550 square feet, making it suitable for bedrooms, nurseries, or bathrooms. With a solid cooling capacity of 12,000 BTUs, it efficiently manages temperature and includes a built-in dehumidifier that removes about 2.3 pints of moisture per hour, helping improve comfort on humid days. In terms of energy use, it has an Energy Efficiency Ratio (EER) of 10.5, supported by energy-saving modes like 'Energy Saver' and 'Sleep' that help reduce electricity bills without compromising comfort.

The noise level sits at around 56.5 decibels, which is average for this type of unit—noticeable but not overly loud for most rooms. Installation requires mounting through a wall, which keeps your window space free and maintains a clean look inside, though some effort is needed to fit it properly using the included trim kit. The unit also comes with a smart remote control that measures the room temperature and adjusts settings accordingly every few minutes, making it easy to use.

Additional helpful features include adjustable airflow louvers, programmable timer, and a filter light reminder to keep maintenance on track. The unit’s weight at over 78 pounds means installation may require assistance. Though it doesn’t have a star energy rating, its combination of features and reasonable energy efficiency make it a solid choice for those seeking a reliable, quiet, and space-saving air conditioner for moderately sized rooms.