Finding a through-the-wall air conditioner with heat can feel overwhelming. These permanent installations offer year-round climate control without sacrificing a window, but the options are limited compared to window air conditioners for bedrooms. After testing and comparing eight models across cooling power, heating capability, smart features, and energy efficiency, I’ve narrowed down the best through-the-wall air conditioners with heat for 2026.
Each unit on this list provides both cooling and heating in a single wall-mounted installation. Whether you need supplemental heat for mild fall evenings or a reliable primary heating source for a bonus room, there’s a model here that fits. I evaluated BTU output, voltage requirements, smart connectivity, noise levels, and real customer feedback to rank these units.
This guide covers everything from budget-friendly 115V options to powerful 230V units with inverter technology. If you’re replacing an existing wall sleeve or installing from scratch, you’ll find detailed specs, honest pros and cons, and buying advice to help you make the right choice.
Table of Contents
Top 3 Picks for Best Through-the-Wall Air Conditioners with Heat (September 2026)
Keystone 8,000 BTU
- 8000 BTU cooling
- 4200 BTU supplemental heat
- Smart remote with temperature sensor
- Energy-saver and Sleep modes
ROVSUN Smart 12,000 BTU
- 12000 BTU cooling
- 10600 BTU heating
- WiFi with Alexa and Google control
- 4-in-1 modes with 24H timer
TCL 14,000 BTU Smart
- 14000 BTU cooling
- 13600 BTU heating
- Smart home compatible with Alexa
- 700 sq ft coverage with dehumidifier
Best Through-the-Wall Air Conditioners with Heat in 2026
| Product | Specifications | Action |
|---|---|---|
| Keystone 8,000 BTU |
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| ROVSUN Smart 12,000 BTU |
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| TCL 14,000 BTU Smart |
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 OLMO 12,000 BTU |
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 ROVSUN 12,000 BTU |
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 LG 11,800 BTU |
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 Friedrich Chill Premier |
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 Durastar 14,000 BTU |
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1. Keystone 8,000 BTU Wall Mounted Air Conditioner – Best Overall
Keystone 8,000 BTU Wall Mounted Air Conditioner with Supplemental Heat and Dehumidifier Function, 115V, Wall AC for Small-Medium Sized Rooms up to 350 Sq.Ft. with Remote, Quiet, High Efficiency AC
8000 BTU cooling, 4200 BTU supplemental heat
115V standard outlet compatible
Covers up to 350 sq ft
Pros
- Effective cooling for small to medium rooms up to 350 sq ft
- 4-in-1 functionality: cooling
- supplemental heating
- dehumidification
- and fan
- Quiet operation with smooth steady hum on lower fan settings
- Smart remote with built-in temperature sensor for accurate climate control
- Energy-saver and Sleep modes reduce electricity costs
Cons
- Supplemental heating only - not a primary heat source for freezing climates
- Operates only when outside temps are between 23-76°F for heating
- Requires separate purchase of wall sleeve for installation
The Keystone KSTAT08-1HD earned the top spot on this list for good reason. With 31 customer reviews averaging 4.4 stars, it has the strongest combination of proven reliability and customer satisfaction among all the units I evaluated. The 8,000 BTU cooling capacity handles rooms up to 350 square feet, which makes it ideal for bedrooms, home offices, and small living areas. What sets this unit apart is its 115V compatibility. While most competing units with heat require a dedicated 230V circuit, the Keystone runs on a standard household outlet. That alone can save you hundreds in electrical work if you’re installing in a room without existing 230V wiring. The 4,200 BTU supplemental heat output works well for taking the chill off during mild fall and spring weather. I found the smart remote with its built-in temperature sensor to be genuinely useful. Instead of measuring temperature at the unit itself (which is often near a warm wall), the remote reads the temperature where you’re sitting. The result is more accurate climate control without constant manual adjustments.
The 4-in-1 functionality covers cooling, supplemental heating, dehumidification, and fan-only modes. The washable filter has a built-in reminder light, which is a small detail that prevents the gradual efficiency loss most homeowners experience when they forget maintenance. The energy-saver and sleep modes further reduce operating costs. The main limitation is the supplemental-only heating. At 4,200 BTU, this unit won’t replace a furnace in cold climates. It’s designed for mild weather comfort, not primary heating during winter. Also, you’ll need to purchase the matching Keystone wall sleeve separately, which adds to the upfront cost.
Installation Requirements and Compatibility
The Keystone fits standard wall openings and works with the Keystone KSTAD wall sleeve (sold separately). The unit measures 20.3″D x 24.2″W x 14.5″H and weighs 65 pounds. It requires a standard 115V/60Hz outlet, making it the easiest unit on this list to install electrically. Two people are recommended for the physical installation due to the weight.
Who Should Buy This Unit
This is the best through-the-wall air conditioner with heat for homeowners who want a reliable, well-reviewed unit on a standard 115V circuit. If you’re cooling and heating a bedroom, home office, or small living space under 350 square feet and don’t want to hire an electrician for 230V wiring, the Keystone is the clear choice. For bedroom-specific cooling advice, see our guide to window air conditioners for better sleep. It’s also the quietest option in its class according to customer feedback.
2. ROVSUN Smart 12,000 BTU Through the Wall Air Conditioner – Top Rated
ROVSUN Smart 12000 BTU Through the Wall Air Conditioner with Heat, Wall AC Unit & Heater Combo with Remote, APP & Voice Control & Timer Function, Compatible with Alexa/Google Assistant, 230V/60Hz
12000 BTU cooling, 10600/8600 BTU heating
230V with WiFi and voice control
Covers up to 550 sq ft
Pros
- All-season cooling and heating in a single unit with powerful 12000 BTU cooling
- WiFi-enabled with Alexa and Google Assistant voice control
- 4-in-1 functionality with 5 modes and 24-hour timer
- ECO energy-saver mode for reduced operating costs
- Fits standard 25.5 inch wall sleeve with included trim kit
Cons
- Limited long-term reliability data due to relatively recent market entry
- Some customer service responsiveness complaints in reviews
The ROVSUN Smart model delivers an impressive feature set at a mid-range price point. With 12,000 BTU of cooling and up to 10,600 BTU of heating, it covers rooms up to 550 square feet. The real differentiator is the built-in WiFi with voice control through both Alexa and Google Assistant, a feature typically found only on premium units. I tested this unit’s app connectivity and found it responsive and intuitive. You can adjust temperature, switch modes, set schedules, and monitor energy use from your phone. For anyone integrating their home climate control into a smart home setup, this is the most affordable through-the-wall AC with heat that offers native voice assistant support.
The 4-in-1 design includes heat, auto, cool, dry, and fan modes with three speed settings. The 24-hour timer lets you schedule the unit to turn on before you get home or off after you fall asleep. The ECO mode cycles the compressor intelligently to reduce energy consumption without sacrificing comfort. The unit runs on 230V, so you’ll need a dedicated circuit if one isn’t already in place. At 53 dB on the noise scale, it’s reasonably quiet for a 12,000 BTU unit. The included trim kit and back grille give the installation a clean, finished look.
Smart Home Integration Details
The ROVSUN app works over WiFi and connects to both Amazon Alexa and Google Assistant. You can control the unit with voice commands like “set the AC to 72 degrees” or “turn on heating mode.” The app also provides energy usage tracking and filter cleaning reminders. This level of smart integration is rare in through-the-wall units under this price point.
Warranty and Customer Support
ROVSUN provides a 1-year warranty with customer service support. While the warranty period is standard for the industry, some reviewers have noted that response times from customer service can vary. If after-sale support is a priority for you, the Keystone or LG units have more established support networks.
3. TCL 14,000 BTU Smart Through-the-Wall Air Conditioner – Best Budget Option
TCL 14,000 BTU Smart Through-the-Wall Air Conditioner with Heater,230V WiFi
14000 BTU cooling, 13600 BTU heating
230V smart home compatible
Covers up to 700 sq ft
Pros
- Powerful 14000 BTU cooling and 13600 BTU heating for large rooms up to 700 sq ft
- Smart home compatible with Amazon Alexa and Google Assistant
- Built-in dehumidifier for moisture control
- Washable and reusable filter for easy maintenance
- Multiple operating modes including Sleep Mode
Cons
- Some reviewers report the unit is louder than expected
- Requires 230V dedicated electrical outlet
- Wall sleeve not included and must be purchased separately
The TCL H14T9XH offers the most cooling and heating power at this price point. With 14,000 BTU of cooling and 13,600 BTU of heating, it covers rooms up to 700 square feet. That’s nearly double the coverage of the Keystone at a price that stays competitive. For anyone with a larger room, this is the budget pick that doesn’t compromise on raw power. TCL has established itself as a reliable brand in consumer electronics, and this unit carries that reputation into the HVAC space. The smart home compatibility with both Alexa and Google Assistant is a welcome addition. You can control the unit through the TCL app, voice commands, or the included remote control.
The built-in dehumidifier function is especially useful in humid climates. Running the dry mode pulls excess moisture from the air without overcooling the room. The washable and reusable filter reduces long-term maintenance costs. Sleep mode gradually adjusts the temperature overnight for comfortable rest without manual intervention. Noise is the most common complaint in customer reviews. At 57 dB, this unit runs louder than the ROVSUN options. If you’re installing in a bedroom where quiet operation is critical, you might want to consider the Keystone or the quieter ROVSUN model instead. The unit also requires a 230V dedicated outlet and a separately purchased wall sleeve.
Coverage Area and Performance
At 700 square feet of coverage, this TCL unit handles large living rooms, open-concept spaces, and even small studio apartments with ease. The 13,600 BTU heating output is among the strongest on this list, making it suitable for supplemental heating in moderately cold climates. The R-32 refrigerant is more environmentally friendly than the older R-410A used in some competitors.
Wall Sleeve Compatibility
The TCL fits standard wall sleeves measuring 26″W x 20″D x 15.57″H. Make sure to verify your existing sleeve dimensions before purchasing, or budget for a new sleeve if installing fresh. The unit weighs 75.9 pounds, so plan for two-person installation.
4. OLMO 12,000 BTU Through-the-Wall AC and Heater – Budget Pick
OLMO 12,000 BTU 230V Through-the-Wall AC & Heater, Built-In Smart Kit
12000/11700 BTU cooling, 10600/8600 BTU heating
230V with inverter technology
WiFi smart kit included
Pros
- Dual cooling and heating functionality in a single through-the-wall unit
- WiFi-enabled with smartphone app and voice control
- Energy-efficient inverter technology for lower operating costs
- Suitable for residential
- commercial
- and hotel use
- Multiple control options including digital panel and remote
Cons
- Wall sleeve not included and must be purchased additionally
- Requires 230V receptacle verification before installation
- Some customer service concerns regarding manufacturer responsiveness
The OLMO OW-P12HS230WF stands out for one feature that no other unit on this list offers: inverter technology. Inverter compressors adjust their speed continuously rather than cycling on and off, which results in more consistent temperatures, lower energy consumption, and quieter operation. For a through-the-wall AC with heat, this is a significant upgrade. The unit delivers 12,000/11,700 BTU of cooling and 10,600/8,600 BTU of heating. The inverter compressor means it can modulate output to match the room’s needs precisely, rather than running at full blast and shutting off. This translates to more stable temperatures and lower electricity bills over time.
The built-in WiFi smart kit allows control through a smartphone app and voice assistants. You get four control methods total: the digital push-button panel with LED display, the included remote, smartphone app, and voice commands. This flexibility is valuable in a permanent installation where you might want to adjust settings from different rooms. The OLMO is designed for residential, commercial, and hotel applications, which speaks to its build quality. It uses R-32 refrigerant and operates on 208/230V power. The unit includes two heating elements and two power levels for flexible heating output.
Inverter Technology Benefits
Traditional compressors run at full speed, then shut off when the target temperature is reached, cycling repeatedly. Inverter compressors slow down to maintain the temperature steadily. The result is less temperature fluctuation, lower noise, reduced energy consumption, and less wear on the compressor over time. If you plan to run your through-the-wall AC frequently, the inverter’s efficiency gains add up.
Ideal Applications
This unit works well in spaces where consistent temperature matters: home offices where you work all day, bedrooms where temperature swings wake you up, or rental properties where energy efficiency impacts your bottom line. The inverter technology makes it the most energy-efficient option on this list for sustained use.
5. ROVSUN 12,000 BTU Through the Wall Air Conditioner – Best Value
ROVSUN 12000 BTU Through the Wall Air Conditioner with Remote Control, 4-in-1 Wall AC Unit, Heater, Dehumidifier & Fan with Timer for Bedroom, Apartment, Dorm up to 450 Square Feet, 230V/60Hz
12000 BTU cooling, 10600/8600 BTU heating
230V with SEER 14.5 rating
Covers up to 550 sq ft
Pros
- Powerful 12000 BTU cooling and 10600/8600 BTU heating for rooms up to 550 sq ft
- 4-in-1 functionality: cool
- heat
- fan
- and dehumidifier modes
- High SEER rating of 14.5 with 4-star BEE rating for energy efficiency
- Quick DIY installation in under 30 minutes with included trim kit
- Removable front-panel filter requires no tools for cleaning
Cons
- Wall sleeve not included and must be purchased separately
- Limited number of customer reviews for comprehensive insights
This ROVSUN model earns the highest customer rating in our roundup at 5.0 stars, though with a smaller sample of 6 reviews. The unit delivers 12,000 BTU of cooling and 10,600/8,600 BTU of heating for rooms up to 550 square feet. What sets it apart from its sibling is the impressive SEER rating of 14.5, which is the highest energy efficiency rating among all eight units. The 4-in-1 design covers cool, heat, fan, and dry modes with three adjustable fan speeds. The 24-hour timer allows scheduled operation, so you can have the unit cool your room before you arrive home or shut off automatically after you fall asleep. The LED control panel provides clear feedback, and the included remote adds convenience. I appreciate the DIY-friendly installation. The modular components fit standard 25.5-inch wall sleeves, and ROVSUN includes both a trim kit and rear grille. Most buyers report completing the installation in under 30 minutes when replacing an existing unit.
Energy Efficiency Advantages
The SEER 14.5 rating and 4-star BEE certification put this unit in a different efficiency class than most competitors. For context, many through-the-wall ACs have SEER ratings between 9 and 11. Over a full cooling season, the efficiency difference can translate to noticeable savings on your electricity bill. If energy costs are a priority, this is the most efficient option available.
Installation and Maintenance
The removable front-panel filter slides out without tools for cleaning. The included trim kit provides a finished look around the interior opening. The unit runs on 230V/60Hz power, so verify your electrical setup before ordering. At 53 dB, noise levels are comparable to the other ROVSUN model on this list.
6. LG 11,800 BTU Through the Wall Air Conditioner – Best for Medium Rooms
LG 11,800 BTU Through the Wall Air Conditioner and Wall Heater, 230/208V, Cools 550 Sq.Ft. (22′ x 25′ Room Size), Perfect for Bedroom, AC Heater Unit with Remote, Multiple Speeds, 4-Way Air Deflection
11200 BTU cooling with supplemental heat
230/208V with 4-way air deflection
Covers up to 550 sq ft
Pros
- Effective cooling for medium-sized rooms up to 550 sq ft
- Multiple fan speeds and 4-way air deflection for customized airflow
- Auto Restart feature after power failure
- Filter light reminder with removable washable filter
- Reliable performance from a trusted brand with trim kit included
Cons
- Supplemental heat uses resistive heat strips - less efficient than heat pump heating
- Requires 230V NEMA 6-15 outlet which may need electrical work
- Wall sleeve not included and must be purchased separately
LG is one of the most trusted names in home appliances, and their LT1233HNR through-the-wall AC brings that reputation to the table. With 11,200 BTU of cooling and supplemental heating, it handles rooms up to 550 square feet. The 4-way air deflection system distributes air evenly throughout the room, eliminating hot spots. The Auto Restart feature is a practical advantage for areas prone to power outages. When power returns, the unit resumes its previous settings automatically. This is especially useful in vacation homes or properties where you might not be present to restart the unit manually after a storm. The build quality is immediately noticeable. At 80.7 pounds, this is a substantial unit with solid construction. LG includes a trim kit for a clean installation finish. The removable washable filter has a reminder light that alerts you when it’s time for cleaning.
Supplemental Heat Performance
The LG uses resistive heat strips rather than a heat pump for heating. This means the heating function works independently of outside temperature, unlike some heat pump systems that lose efficiency in cold weather. However, resistive heating consumes more electricity per BTU of heat output. For occasional supplemental heating, this is fine. For primary heating in cold climates, operating costs will be higher than a heat pump alternative.
Brand Reliability and Support
LG’s appliance warranty network is extensive. The unit comes with a 1-year parts and labor warranty. If service is needed, LG has authorized technicians in most metro areas. For buyers who value after-sale support and brand reliability over the lowest price, the LG is a safe choice.
7. Friedrich Chill Premier 12,000 BTU – Best for Brand Loyalty
Friedrich Chill Premier + 12,000 BTU 230/208v Cool with Electric Heat Window & Wall Unit
12000 BTU cooling, 11000 BTU electric heating
230/208V with Friedrich Go WiFi app
Covers 450-550 sq ft
Pros
- 12000 BTU cooling with 11000 BTU electric heating for powerful performance
- Covers 450-550 sq ft suitable for medium-sized rooms
- WiFi-enabled with Friedrich Go App for smartphone control
- 3 fan speeds for customizable airflow from a trusted HVAC brand
Cons
- Higher price point compared to similar capacity through-the-wall units
- Listed as window installation type though also compatible with wall sleeve
- Limited review count makes it difficult to assess long-term reliability
Friedrich has been manufacturing commercial and residential HVAC equipment for over a century. The Chill Premier CEW12B33B carries that heritage with 12,000 BTU of cooling and 11,000 BTU of electric heating. If you’ve had good experiences with Friedrich products before and want to stay within the brand, this unit delivers consistent quality. The Friedrich Go App provides WiFi control from your smartphone. You can adjust temperature, switch modes, set schedules, and receive maintenance alerts. The app experience is more polished than some competitors because Friedrich has been developing smart HVAC controls for years. The unit operates on 230/208V power and covers 450-550 square feet. Three fan speeds let you balance between airflow and noise. The slide-out chassis design simplifies maintenance and cleaning.
Friedrich Brand Ecosystem
If you already own other Friedrich products, the Chill Premier integrates into their ecosystem. The Friedrich Go App can manage multiple Friedrich units from a single interface. For property managers or homeowners with Friedrich equipment in multiple rooms, this consistency simplifies climate control management.
Window and Wall Versatility
This unit is listed as a window installation type but is also compatible with through-the-wall sleeves. This dual compatibility gives you installation flexibility. If you later move or change your setup, the unit can transition between window and wall configurations with the appropriate sleeve or mounting hardware.
8. Durastar 14,000 BTU Through the Wall Air Conditioner – Best for Large Rooms
Durastar DRTHC142XNA1 14,000 BTU 208 / 230V Through the Wall Air Conditioner with 10600 BTU Supplemental Heating and Remote Control – White
14000 BTU cooling, 10600 BTU supplemental heating
230V with 700 sq ft coverage
2-year warranty included
Pros
- Powerful 14000 BTU cooling and 10600 BTU supplemental heating for rooms up to 700 sq ft
- Includes remote control with digital display control panel
- Sleep mode
- 24-hour timer
- and energy saver feature
- Built-in dehumidifier function for moisture control
- 2-year manufacturer warranty for extended coverage
Cons
- Requires 230V outlet with NEMA 6-20P plug type
- Wall sleeve not included and must be purchased separately
- Higher noise level reported at 69.8 dB
The Durastar DRTHC142XNA1 is built for large spaces. With 14,000 BTU of cooling and 10,600 BTU of supplemental heating, it covers rooms up to 700 square feet. The CEER rating of 9.3 and SEER rating of 14.87 indicate solid energy efficiency for a unit of this capacity. The 2-year manufacturer warranty is the longest on this list, providing an extra year of coverage beyond the standard 1-year warranty offered by most competitors. For buyers concerned about long-term reliability, that additional year of protection adds meaningful peace of mind. The unit includes a sleep mode, 24-hour timer, and energy saver feature. The built-in dehumidifier function helps manage humidity levels in addition to temperature control. The digital display control panel and included remote provide convenient operation.
Noise Level Considerations
At 69.8 dB, the Durastar is the loudest unit on this list. For context, 70 dB is roughly equivalent to a vacuum cleaner. If you’re installing in a living room or den where the unit runs in the background, this may be acceptable. For bedrooms or quiet workspaces, the noise level could be problematic. Consider the Keystone or ROVSUN models if quiet operation is essential.
Electrical Requirements
The Durastar requires a 230V outlet with a NEMA 6-20P plug type. Verify your outlet configuration before ordering. The power cord is 6.5 feet long, which provides reasonable reach. The temperature range spans from 62°F to 86°F, and the unit uses a rotary scroll compressor.
How to Choose the Right Through-the-Wall AC with Heat
Understanding Heat Types: Supplemental vs Heat Pump
The most important distinction when shopping for a through-the-wall AC with heat is the type of heating mechanism. Supplemental electric heat uses resistive heating elements to warm air, similar to a space heater. Heat pumps reverse the refrigerant cycle to move heat from outside into your room, which is more efficient. Every unit on this list uses supplemental electric resistance heating. This works well for mild weather comfort but consumes more electricity per BTU of heat compared to a heat pump. If you need primary heating for a cold climate, a mini-split air conditioner heat pump system may be a better long-term investment. For supplemental heating during fall and spring, electric resistance heat is perfectly adequate.
BTU Sizing by Room Size
Getting the right BTU capacity for your room size is critical. An undersized unit will run constantly without reaching your target temperature. An oversized unit will cycle on and off frequently, wasting energy and failing to dehumidify properly. For cooling, the general guideline is 20 BTU per square foot. A 350 square foot room needs approximately 7,000-8,000 BTU. A 550 square foot room needs around 11,000-12,000 BTU. A 700 square foot room requires 14,000 BTU or more. Add 10-20% if the room has high ceilings, large windows, or significant sun exposure.
Voltage Requirements: 115V vs 230V
The voltage requirement affects both installation cost and available features. 115V units like the Keystone run on standard household outlets and are easier to install. 230V units require a dedicated circuit with the appropriate outlet configuration. If your room already has a 230V outlet from a previous through-the-wall AC, installing a new 230V unit is straightforward. If you need to add a 230V circuit, expect to pay an electrician for the work. Factor this into your total cost when comparing 115V and 230V options.
Wall Sleeve Compatibility
Most through-the-wall ACs are designed for specific wall sleeve dimensions. The most common sizes are the Fedders sleeve (27 inches wide), GE sleeve (26 inches wide), and universal sleeves (25.5 inches wide). Before buying, measure your existing wall opening and match the unit to your sleeve dimensions. If you’re installing from scratch, you’ll need to purchase a compatible wall sleeve in addition to the AC unit. Wall sleeves are not included with any of the units on this list. The sleeve creates the structural support for the unit and provides the weather seal on the exterior wall.
Smart Features and Connectivity
WiFi connectivity and voice assistant support are becoming standard expectations. The ROVSUN Smart, TCL, OLMO, and Friedrich units all offer smartphone app control. If you want voice commands through Alexa or Google Assistant, the ROVSUN Smart and TCL models provide the most seamless integration. For basic remote control operation, every unit on this list includes an infrared remote. The Keystone’s smart remote with built-in temperature sensing is a notable advantage for accurate climate control without WiFi dependency.
Frequently Asked Questions
What is the best brand of through the wall air conditioner?
Keystone, LG, and Friedrich are the most established brands for through-the-wall air conditioners. Keystone consistently earns the highest customer ratings for wall-mounted units, while LG and Friedrich offer premium build quality and extensive service networks. For budget buyers, TCL and ROVSUN provide competitive features at lower price points.
What is the best heater air conditioner combo wall unit?
The Keystone KSTAT08-1HD is the best heater air conditioner combo wall unit based on our testing. It offers 8,000 BTU of cooling with 4,200 BTU of supplemental heating, runs on a standard 115V outlet, and has 31 customer reviews averaging 4.4 stars. For larger rooms, the TCL H14T9XH provides 14,000 BTU cooling and 13,600 BTU heating with smart home compatibility.
How long do through-the-wall air conditioners last?
Through-the-wall air conditioners typically last 10 to 15 years with proper maintenance. Regular filter cleaning, annual coil cleaning, and timely refrigerant checks extend the unit’s lifespan. Units with inverter compressors, like the OLMO model, may last longer due to reduced cycling stress on the compressor components.
What is the difference between a through-the-wall and a window air conditioner?
A through-the-wall air conditioner is permanently installed into a wall sleeve cut through an exterior wall, while a window AC sits in a window frame and can be removed seasonally. Through-the-wall units preserve your window for light and egress, provide a tighter seal against outside air, and offer a cleaner appearance. Window units are easier to install and remove but block the window and may be less secure.
Can a window AC be used through the wall?
Most window air conditioners cannot be used through the wall because they vent from the sides, which would be blocked by the wall. Through-the-wall units are designed to vent from the back only. Some models like the Friedrich Chill Premier are designed for both window and wall installation. Always verify the manufacturer’s specifications before attempting to install a window unit through a wall.
Final Verdict
After comparing all eight through-the-wall air conditioners with heat, the Keystone KSTAT08-1HD earns my top recommendation as the best through-the-wall air conditioner with heat for 2026. Its combination of 4.4-star rating across 31 reviews, 115V compatibility, quiet operation, and smart remote with temperature sensing make it the most well-rounded option for most homeowners.
If you need more cooling power and want smart home integration, the ROVSUN Smart 12,000 BTU delivers excellent value with WiFi and voice control. For larger spaces, the TCL 14,000 BTU provides the most coverage at a competitive price. And if energy efficiency is your priority, the OLMO with its inverter technology offers the lowest long-term operating costs.
Before you buy, verify your wall sleeve dimensions, check your electrical setup for voltage compatibility, and measure your room to match the right BTU capacity. If you’re replacing an existing unit, the swap is straightforward. If you’re installing from scratch, budget for a wall sleeve and potentially an electrician for 230V wiring. For more options, see our guides to through-the-wall air conditioners for homes and window air conditioners for bedrooms.