Choosing the best through the wall air conditioner with heater allows you to enjoy efficient temperature control no matter the season. Whether you want to cool a large living space or warm a bedroom during colder months, these units provide versatile solutions with supplemental heating and cooling functions. Below is a summary table presenting some of the top-rated through the wall AC units featuring heaters, ideal for different room sizes and power requirements.
| Product | Cooling Capacity (BTU) | Heating Capacity (BTU) | Coverage (Sq.Ft.) | Voltage |
|---|---|---|---|---|
| Keystone 14,000 BTU Wall Mounted AC with Supplemental Heat | 14,000 | 10,600 (Supplemental) | Up to 700 | 230V |
| Frigidaire Through-the-Wall Room AC | 12,000 | None | Up to 550 | 115/120V |
| Keystone 23,200 BTU Through the Wall AC with Heater | 23,200 | 16,000 (Supplemental) | Up to 1,500 | 230V |
| BLACK+DECKER 18,000 BTU Window or Through The Wall AC | 18,000 | None | Up to 1,000 | 115V |
| ROVSUN 8000 BTU Through the Wall AC with Heater | 8,000 | Heater Included | Up to 350 | 115V |
Keystone 14,000 BTU Wall AC with Supplemental Heat

The Keystone 14,000 BTU wall mounted air conditioner with supplemental heat is designed for spaces up to 700 square feet. It features a 14,000 BTU cooling capacity and a 10,600 BTU supplemental heating function, making it perfect for year-round comfort in large rooms. This quiet, high-efficiency unit also offers dehumidification and fan circulation modes, ensuring flexible climate control.
The supplemental heating is recommended for moderate outdoor temperatures between 23°F and 76°F and should not be considered a primary heating source. Its space-saving, through-the-wall design preserves window views and floor space, with installation facilitated by an interior trim kit. Note this model requires a dedicated 230-volt/20-amp electrical outlet.
Frigidaire 12,000 BTU Through-the-Wall Air Conditioner

The Frigidaire through-the-wall air conditioner delivers 12,000 BTUs of powerful cooling, suitable for rooms up to 550 square feet. This wall-mounted unit is designed for through-the-wall installation and includes a slide-out chassis, making installation and maintenance straightforward.
It comes with a washable mesh filter that captures dust to maintain efficient airflow and performance. Although it does not include a heating function, its reliable cooling and user-friendly features like a remote control, timer, and sleep mode make it an excellent choice for moderate climates or supplemental cooling needs.
Keystone 23,200 BTU Through the Wall AC with 16,000 BTU Heat

This Keystone 23,200 BTU through the wall air conditioner is suitable for large rooms up to 1,500 square feet. It combines strong 23,200 BTU cooling with 16,000 BTU supplemental heating, enabling year-round climate control. This unit includes a dehumidifier and fan circulation modes, enhancing air quality and comfort.
The smart remote control monitors and adjusts the temperature every 3 minutes for precise comfort. Similar to Keystone’s smaller model, its supplemental heat function should complement existing heating systems and is not a primary heat source. This powerful 230V unit fits well in spacious living rooms or office areas.
BLACK+DECKER 18,000 BTU Window or Through The Wall AC

The BLACK+DECKER 18,000 BTU air conditioner accommodates rooms up to 1,000 square feet with consistent, effective cooling. This versatile unit works either through the wall or in a window, offering flexibility in installation. It has three cooling speeds plus a fan-only mode to customize airflow.
The included remote control offers full functionality, including sleep mode, energy saver setting, and a 24-hour timer. While it does not feature heating capabilities, this unit’s strong cooling power and convenience make it ideal for summer months or warmer climates where additional heating is not required.
ROVSUN 8000 BTU Through the Wall AC with Heater

The ROVSUN 8000 BTU through the wall air conditioner delivers efficient cooling and heating for smaller spaces up to 350 square feet. Its 4-in-1 functionality supports cooling, heating, dehumidification, and fan-only operation, perfect for bedrooms, dorms, or apartments.
Users can control the unit with a remote or LED control panel and select from three fan speeds plus a 24-hour timer for customized comfort. Running on standard 115V power, this unit offers versatile, compact climate control where space and wiring options are limited.
Buying Guide For Through The Wall Air Conditioners With Heater
When selecting a through the wall air conditioner with heater, thoughtful consideration of several key factors ensures you find an efficient and well-suited unit for your space:
Cooling and Heating Capacity
The BTU rating for both cooling and supplemental heating determines the size of the room the unit can handle effectively. Measure your space and choose a unit meeting or slightly exceeding that capacity to maintain comfort without wasting energy.
Power Requirements and Voltage
Check the electrical specifications of the unit. Some models require 230V outlets, common in larger installations but may need professional wiring if absent. Smaller units typically run on standard 115V outlets, easier for most residential setups.
Supplemental Heat Function
Many through the wall AC units with heaters offer supplemental heating meant to support, not replace, your primary heating system. Understanding this limitation is crucial for cold climates where the unit alone won’t suffice for winter heating.
Installation and Space Considerations
Through the wall units require a dedicated wall sleeve for installation. Ensure measurements are compatible with your wall thickness and opening. These units save window space and floor space compared to window-only models.
Features and Controls
Remote controls, smart temperature sensors, washable filters, timers, and energy-saving modes enhance usability and efficiency. Choose a model whose features align with your lifestyle and convenience preferences.
Noise Level
Quiet operation is important for bedrooms, offices, or living spaces. Look for units that specify noise levels or describe their design as quiet or low-noise.
By weighing these aspects carefully, you can select the best through the wall air conditioner with heater that delivers comfort, convenience, and value throughout the year.