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

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.

The LG 7,500 BTU Window Air Conditioner with Supplemental Heat is designed to efficiently cool and heat medium-sized rooms up to 320 sq. ft., making it a solid choice for spaces like bedrooms or small offices. One of its key strengths is the low noise performance, operating at just 50dB in low mode, which is beneficial for those who prefer a quieter atmosphere while enjoying comfort. The supplemental heating feature is a plus during colder months, providing warmth when you need it, making this unit versatile for year-round use.

The unit also offers multiple fan speeds, allowing users to customize their airflow, which helps in achieving personalized comfort. The auto restart feature is particularly handy, ensuring the air conditioner resumes operation automatically after a power outage, so you won’t have to worry about readjusting settings.

While the cooling capacity is suitable for rooms up to 320 sq. ft., it might not be powerful enough for larger spaces or extremely hot climates. Additionally, its seasonal energy efficiency ratio (SEER) of 13 is not the highest on the market, which could mean higher energy bills over time, especially for prolonged use. It's not Energy Star rated, which some users might consider a drawback regarding energy savings. Installation is required, but the included kit and instructions help simplify the process. Weighing in at 69 pounds, it might require some effort to set up, especially for those unfamiliar with air conditioner installations. This unit is a good option for individuals looking for a reliable air conditioner with heating capabilities for smaller spaces, but it's important to consider the potential energy costs and the suitability for larger areas.

The Keystone 10,000 BTU wall-mounted air conditioner with supplemental heat is a solid choice for cooling and adding some warmth to small to medium rooms up to about 450 square feet. Its cooling capacity of 10,000 BTUs and supplemental heating at 10,600 BTUs can keep you comfortable throughout much of the year, though the heating function is designed to assist rather than fully replace your main heating. With a SEER rating of 9.6, it offers reasonable energy efficiency, and the Energy Saver and Sleep modes help lower power use, which is great for managing electric bills.

Installation is straightforward with the included universal interior trim kit, and because it's installed through the wall, it saves window space and keeps your view clear. Noise level is moderate at 58 decibels, so it won’t be completely silent but should be acceptable for most living areas. Extra features like the remote control with room temperature display, dehumidifier function removing 2.3 pints per hour, and a filter light reminder add convenience.

On the downside, the unit is somewhat bulky and heavy, weighing nearly 74 pounds, which might require professional installation. Also, the heating mode only works efficiently when outside temperatures are between 23 and 76 degrees Fahrenheit, so it’s not suitable as a primary heater in colder climates. If you want a dependable wall AC that also provides some supplemental heat and dehumidification without taking up window space, this Keystone model fits well, especially for milder climates and moderate-sized rooms.