10 Best Thru The Wall Ac With Heat 2026 in the United States

The Keystone 18,800 BTU Window-Wall Air Conditioner with 16,000 BTU Supplemental Heating is designed to provide efficient comfort for large spaces up to 1,000 sq. ft. It offers a high cooling capacity of 18,000 BTUs and a supplemental heating capacity of 16,000 BTUs, making it suitable for year-round use. However, it's important to note that the heating function is meant to supplement existing heat sources rather than serve as the primary heating method.

The unit has a Seasonal Energy Efficiency Ratio (SEER) of 10.7, which is reasonable but not outstanding, and it is not Energy Star rated. This means while it offers energy-saving modes like 'Energy Saver' and 'Sleep,' it may not be as energy-efficient as other models in its category. Installation is facilitated by a window installation kit, and the unit can be mounted either through a window or wall, which adds flexibility.

The noise level is rated at 55 dB, which is moderate and should be acceptable for most users, though not the quietest on the market. Additional features include a smart remote with temperature sensing, dehumidification, and a 4-way swing for better air distribution, enhancing user convenience and comfort. The unit also has a filter light reminder to help maintain optimal performance. Weighing 117.3 pounds, it might require some assistance during installation. Priced competitively, this unit offers good value, but those seeking top-tier energy efficiency might want to consider other options.

The Keystone 14,000 BTU wall-mounted air conditioner is designed for large rooms up to about 700 square feet, offering solid cooling power with a supplemental heating option of 10,600 BTUs. This makes it a versatile choice for year-round comfort, especially in moderate climates where the supplemental heat can help during cooler months but isn’t intended as a primary heat source. It operates on 230 volts, which means installation requires a dedicated 20-amp outlet—something to plan for if you don’t already have it.

Noise level is moderate at around 61.5 decibels, quieter than many window units but not completely silent, so it should be acceptable for living rooms or large common spaces. The unit has a decent energy efficiency rating (SEER 9.3), paired with energy-saving modes like 'Sleep' and 'Energy Saver' to help keep electricity costs down. Additional features like a built-in dehumidifier, fast cooling, a filter light reminder, and a smart remote with temperature sensing add convenience and improve comfort. The design saves space and keeps windows clear since it’s thru-the-wall mounted.

On the downside, it weighs over 78 pounds, which means installation might require professional help. Also, its supplemental heating works best when outside temperatures are between 23°F and 76°F, so it’s not suited for very cold climates as a heat source. For those seeking a reliable, quiet, and efficient wall AC unit with some heating and dehumidifying capabilities for a large room, the Keystone 14,000 BTU is a strong contender, especially if the electrical requirements can be met.

The Amana 15,000 BTU Distinctions PTAC with R32 heat pump and 3.5 kW electric heater is well-suited for medium-sized rooms up to about 750 square feet. It offers solid cooling power around 14,500-14,700 BTUs and good heating capacity through both the heat pump (13,200-13,500 BTUs) and an electric heater backup. This setup ensures reliable temperature control even in colder weather. With an 11.4 Energy Efficiency Ratio (EER), it’s fairly efficient, helped by the eco-friendlier R32 refrigerant that reduces environmental impact compared to older types.

Installation fits a standard 42" PTAC sleeve, making it compatible with common thru-the-wall mounts, though the sleeve and rear grille are sold separately, which could add complexity and cost. The unit includes user-friendly touches like three fan speeds, a fan-only mode, and compatibility with wired thermostats, along with washable, easy-to-access filters that simplify maintenance. Features like the automatic emergency heat provide extra peace of mind during very cold spells.

Weighing 122 pounds and measuring 42 x 21 x 16 inches, it’s a substantial unit, so proper installation and support are important. For those seeking a dependable thru-the-wall air conditioner with solid heating capability and decent energy efficiency, especially for a moderate-sized space, this Amana model presents a strong option, though installation details and noise considerations should be reviewed beforehand.