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 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.

The LG 9,800 BTU through-the-wall air conditioner with supplemental heat is designed for medium-sized rooms up to about 440 square feet, making it suitable for bedrooms or offices. It offers both cooling and heating functions, which is helpful for year-round comfort without needing separate units. The cooling capacity is around 10,000 BTUs, which aligns well with the room size it’s intended for. Heating is supplemental, meaning it can provide warmth but may not replace a full heating system in very cold climates.

The energy efficiency rating, at a SEER of 9.8, is average compared to newer models, so it provides decent but not the most energy-saving performance available. Noise level at 54 decibels is moderate; it won’t be completely silent but should be reasonably quiet for bedroom use. Installation requires a dedicated wall space and 230V power, which might need professional help if you’re not familiar with electrical work. Extra features like multiple fan speeds, 4-way air deflection, a remote control, filter reminder, and washable filter add convenience and flexibility. It also has an auto-restart after power outages, which is useful for continuous comfort.

The unit is not Energy Star certified, so energy costs could be higher than more efficient units. It is somewhat bulky and heavy, which could make installation a bit challenging. For those seeking a simple, dual-purpose wall unit for moderate room sizes and who accept average energy efficiency, this LG model is a solid option. However, if you prioritize very quiet operation or higher energy savings, exploring other models may be beneficial.