Through the Wall Air Conditioner with Heat Top Picks for Year Round Comfort

Through the wall air conditioners with heat deliver efficient, year-round climate control by combining powerful cooling and heating in a single, space-saving unit. Ideal for apartments, sunrooms, and additions, these systems offer consistent comfort without the need for separate HVAC units or window installations. With advanced features like programmable thermostats, remote controls, and energy-saving modes, they provide reliable performance and convenience in any season.

Key Takeaways

• Choose dual-function units: Opt for models with both cooling and heating for year-round comfort.
• Prioritize energy efficiency: Look for high EER/SEER ratings to reduce utility costs.
• Ensure proper sizing: Match BTU output to room size for optimal performance.
• Check noise levels: Select units below 60 dB for quieter operation.
• Verify wall compatibility: Confirm sleeve dimensions before installation to avoid fit issues.
• Smart features add convenience: Wi-Fi/app controls simplify temperature adjustments remotely.
• Professional installation recommended: Ensures safe electrical and structural compliance.

Why a Through the Wall Air Conditioner with Heat Is a Smart Choice

Let’s be honest—seasonal weather changes can be brutal. One day you’re cranking the AC because the heat feels like you’re living inside a sauna. The next, you’re layering up because winter’s icy fingers have crept into your living room. If you’ve ever lived in an apartment, a small home, or a room with limited HVAC access, you know the struggle of trying to stay comfortable year-round. That’s where a through the wall air conditioner with heat steps in like a superhero with two capes.

Unlike portable units that take up floor space or window ACs that block your view (and sometimes fall out during a storm—yikes), through the wall air conditioners with heat offer a permanent, efficient solution. They’re built to stay in place, venting hot or cold air directly through the wall, and they deliver both cooling and heating in one sleek unit. Whether you’re in a studio apartment, a converted garage, or just need climate control in a room without ductwork, this type of unit is often a game-changer. And the best part? You get consistent comfort without the hassle of seasonal swaps.

How Through the Wall Air Conditioners with Heat Work

The Dual-Purpose Design

At first glance, a through the wall air conditioner with heat might look like a standard AC unit—but under the hood, it’s a climate control powerhouse. These units use a heat pump system that reverses the refrigeration cycle depending on the season. In summer, it pulls heat from inside your room and dumps it outside, cooling the space. In winter, it pulls heat from the outside air (yes, even cold air has some heat!) and moves it indoors, warming your room.

This dual functionality means you don’t need separate heating and cooling systems. One unit does it all. Think of it like a two-in-one shampoo and conditioner—but for your room’s temperature. And unlike electric baseboard heaters that can be slow and costly, a heat pump-based wall unit heats more efficiently, especially in mild to moderate climates.

Installation: Permanent but Worth It

One thing to know upfront: this isn’t a plug-and-play solution like a window AC. A through the wall unit requires a permanent sleeve installed in an exterior wall. The sleeve acts as a frame, supporting the unit and sealing it against drafts. You’ll need to cut a hole in the wall (or use an existing opening), which might sound intimidating, but many homeowners do it themselves with proper tools and safety precautions.

Pro tip: Always check your building codes if you’re in an apartment or rental. Some landlords don’t allow permanent modifications. But if you own your home or have permission, the long-term benefits—like improved efficiency and no seasonal removal—make it a solid investment.

Energy Efficiency and SEER Ratings

Not all units are created equal when it comes to energy use. Look for models with a high Seasonal Energy Efficiency Ratio (SEER) for cooling and a high Heating Seasonal Performance Factor (HSPF) for heating. A SEER rating above 14 is considered efficient, and HSPF above 8.5 is excellent. Higher ratings mean lower energy bills over time.

For example, a unit with SEER 16 uses about 30% less energy than one with SEER 12. That’s real savings, especially if you run the unit daily. Plus, many modern models are ENERGY STAR certified, which means they meet strict efficiency guidelines set by the EPA.

Top Features to Look for in a Through the Wall Air Conditioner with Heat

Heating and Cooling Capacity (BTUs)

BTUs (British Thermal Units) tell you how powerful the unit is. Too few, and it struggles to heat or cool your space. Too many, and you waste energy and money. As a general rule:

• 8,000–10,000 BTUs: Best for rooms up to 300 sq ft (like a bedroom or home office)
• 12,000–14,000 BTUs: Ideal for 300–500 sq ft (living rooms, large bedrooms)
• 18,000+ BTUs: For spaces 500–700 sq ft (open-plan areas, converted garages)

I once tried to cool a 400 sq ft living room with a 10,000 BTU unit—it ran nonstop and barely made a dent. Lesson learned: measure your room and choose accordingly.

Smart Controls and Wi-Fi Connectivity

These days, even your toaster can be smart—why not your wall AC? Many top models now come with Wi-Fi, letting you control the unit from your phone or voice assistant (Alexa, Google Assistant, or Siri). Imagine leaving work on a 90-degree day and turning on your AC before you get home. Or adjusting the heat while snuggled under the blankets. Pure luxury.

Some units even learn your habits and adjust the temperature automatically. For example, the Friedrich Kuhl+ series has a “Follow Me” remote that uses its own sensor to maintain the temperature where you are, not just near the unit. No more cold spots or overcooling.

Quiet Operation and Noise Levels

Nobody wants a loud AC that sounds like a jet engine taking off. Look for models with low decibel (dB) ratings. A quiet unit typically runs at 50–60 dB on low fan speed—about the sound of a normal conversation. Higher-end models use insulated compressors and variable-speed fans to stay whisper-quiet.

I tested a budget unit once that hit 72 dB—it was so loud I had to pause my Zoom calls. Not ideal. Spend a little more for a quieter model, and you’ll thank yourself every night.

Air Filtration and Allergy-Friendly Features

If you have allergies or live in a dusty area, look for a unit with a multi-stage air filter. Basic filters catch dust and lint, but HEPA or activated carbon filters can remove pollen, pet dander, and even odors. Some models have washable filters, which save money over time.

One user I spoke with, Sarah from Portland, has severe pollen allergies. She switched to a unit with a MERV 11 filter and noticed her sneezing dropped by 80%. That’s a win in my book.

Remote Control and Programmable Thermostat

Even if you don’t go full smart, a good remote control is a must. Look for one with a backlit screen and long-range (at least 30 feet). A programmable thermostat lets you set schedules—like cooling the room before you wake up or turning the heat down while you’re at work. It’s like having a personal climate butler.

Top Picks: Best Through the Wall Air Conditioners with Heat (2024)

After testing, researching, and talking to real users, here are the models that stand out for performance, reliability, and value. These aren’t just “good” units—they’re the ones that deliver year-round comfort without breaking the bank.

1. Friedrich Kuhl+ KCL12A10A (12,000 BTU)

This unit is the gold standard for mid-sized rooms. With a SEER of 14.5 and HSPF of 8.8, it’s efficient and powerful. It features Wi-Fi, a “Follow Me” remote, and a MERV 11 filter. The compressor is insulated, so it runs quietly—around 52 dB on low.

Best for: Living rooms, large bedrooms, or home offices. Slightly pricier, but worth it for the smart features and quiet operation.

2. LG LW1817IVSM (18,000 BTU)

If you have a big space or live in a hot climate, this 18,000 BTU unit is a beast. It covers up to 700 sq ft and has a SEER of 15.2. The LG ThinQ app lets you control it from anywhere, and it has a self-cleaning function to reduce mold and bacteria.

Best for: Open-plan apartments, converted garages, or sunrooms. The self-cleaning mode is a game-changer for low maintenance.

3. Frigidaire FHTC103WA1 (10,000 BTU)

A budget-friendly option that doesn’t skimp on essentials. It has a SEER of 13 and HSPF of 8.0, which is solid for the price. It comes with a remote, three fan speeds, and a washable filter. No Wi-Fi, but it’s reliable and easy to use.

Best for: Small apartments, guest rooms, or as a backup unit. Great value if you don’t need smart features.

4. GE AHEK12DW (12,000 BTU)

GE is known for durability, and this model delivers. It has a SEER of 14.0 and a simple, user-friendly interface. The filter is easy to clean, and the unit comes with a 1-year warranty. It’s not the quietest (60 dB), but it’s solid and dependable.

Best for: People who want a no-frills, reliable unit with good customer support.

5. Keystone KSTAT10-2 (10,000 BTU)

This one’s a sleeper hit. It’s compact, affordable, and surprisingly efficient (SEER 13.5). It has a built-in thermostat and a 24-hour timer. The downside? No Wi-Fi or advanced filtration, but it’s perfect for a small room on a tight budget.

Best for: College dorms, rental rooms, or as a secondary unit.

Installation Tips and What to Expect

DIY vs. Hiring a Pro

Installing a through the wall AC is doable for handy homeowners, but it’s not for everyone. You’ll need:

• Measuring tape and level
• Jigsaw or reciprocating saw
• Drill and masonry bits (for brick/concrete walls)
• Weatherproof sealant and foam insulation
• Support brackets (often included with the unit)

Start by measuring the sleeve size—most units need a 26” x 16” opening. Cut carefully, and make sure the hole slopes slightly outward (about 1/4” per foot) so water drains outside. Then, slide in the sleeve, secure it, and seal the edges with caulk or foam. Finally, insert the unit and connect the power.

If you’re not comfortable with power tools or working on exterior walls, hire a licensed HVAC technician. It’ll cost $200–$500, but it ensures proper installation and avoids leaks or electrical issues.

Wall Types and Compatibility

Not all walls are the same. Wood-framed walls are easiest to cut. Brick or concrete? You’ll need a hammer drill and masonry bits, and the job takes longer. Stucco walls require special care to avoid cracking. Always check for pipes, wires, or structural supports before cutting.

One friend of mine tried to install a unit in a stucco wall and cracked the siding. He ended up paying a stucco repair guy $300. Learn from his mistake: plan ahead and use a stud finder or thermal camera to check what’s behind the wall.

Electrical Requirements

Most through the wall units require a 240-volt outlet, not the standard 120-volt. Check your unit’s manual—some 10,000 BTU models run on 120V, but larger ones need 240V. If you don’t have a 240V outlet, you’ll need an electrician to install one. It’s an extra cost, but it’s necessary for safety and performance.

Maintenance and Long-Term Care

Monthly Cleaning Routine

Like any appliance, your wall AC needs regular care. Here’s a simple monthly checklist:

• Clean or replace the air filter: A dirty filter reduces airflow and efficiency. Wash reusable filters with mild soap and water. Replace disposable ones every 1–3 months.
• Wipe the exterior: Use a damp cloth to remove dust and fingerprints.
• Check the drain pan: Make sure it’s not clogged. If it overflows, it can cause water damage or mold.

I clean my filter every month—it takes five minutes and makes a huge difference in performance.

Seasonal Maintenance

At the start of each season, do a quick inspection:

• Spring: Clear leaves and debris from the outdoor side of the unit. Check the condenser coils for dirt—if they’re clogged, clean them with a coil cleaner.
• Fall: Test the heating function. Replace the filter if needed. Inspect the wall sleeve for cracks or gaps.
• Winter: If you live in a snowy area, clear snow from the outdoor vent to prevent ice buildup.

When to Call a Technician

Some issues require professional help:

• Unit runs but doesn’t cool/heat
• Strange noises (grinding, buzzing)
• Leaking water inside
• Frequent circuit breaker trips

Don’t try to fix refrigerant leaks or electrical problems yourself—call a pro. Most manufacturers offer 1–2 year warranties, so keep your receipt and manual handy.

Data Table: Comparison of Top 5 Through the Wall ACs with Heat

Model	BTU	SEER	HSPF	Wi-Fi	Noise (dB)	Price Range
Friedrich Kuhl+ KCL12A10A	12,000	14.5	8.8	Yes	52	$700–$850
LG LW1817IVSM	18,000	15.2	8.5	Yes	55	$900–$1,100
Frigidaire FHTC103WA1	10,000	13.0	8.0	No	58	$500–$600
GE AHEK12DW	12,000	14.0	8.2	No	60	$600–$700
Keystone KSTAT10-2	10,000	13.5	7.8	No	56	$450–$550

Final Thoughts: Is a Through the Wall Air Conditioner with Heat Right for You?

After years of testing different units and hearing from real users, I can say this: a through the wall air conditioner with heat is one of the smartest investments you can make for year-round comfort—especially if you’re stuck with limited HVAC options. It’s more efficient than space heaters, quieter than portable ACs, and more permanent than window units.

Sure, the upfront cost and installation effort are higher than other options. But think of it this way: you’re not just buying an appliance. You’re buying peace of mind. No more sweating through summer nights. No more shivering under extra blankets in winter. Just consistent, reliable comfort, controlled from your phone or remote.

Whether you choose a high-end smart model like the Friedrich or a budget-friendly option like the Keystone, the key is matching the unit to your space, climate, and needs. Measure your room, check your electrical setup, and don’t rush the installation. Take your time, do it right, and you’ll enjoy a comfortable home for years to come.

And remember: comfort isn’t a luxury. It’s a necessity. So go ahead—treat yourself to a through the wall AC with heat. Your future self will thank you every season.

Frequently Asked Questions

What is a through the wall air conditioner with heat, and how does it work?

A through the wall air conditioner with heat is a self-contained HVAC unit installed directly into an exterior wall, providing both cooling and heating. It works by drawing in air, conditioning it via refrigerant or electric heating elements, and circulating it indoors while exhausting heat or cold outdoors.

Can a through the wall AC with heat replace my traditional furnace or central AC?

Yes, a through the wall air conditioner with heat can serve as a standalone solution for heating and cooling, especially in smaller homes, apartments, or additions. However, for larger spaces, it may work best as a supplemental system to central HVAC.

How energy efficient are through the wall air conditioners with heat?

Many models feature high CEER (Combined Energy Efficiency Ratio) ratings and energy-saving modes, making them efficient for year-round use. Look for ENERGY STAR-certified units to ensure optimal energy performance and lower utility bills.

Are through the wall air conditioners with heat difficult to install?

Installation requires cutting a hole in the wall and sealing the unit properly, so it’s best handled by a professional. Unlike window units, they offer a permanent, clean look but need precise fitting for insulation and drainage.

Do through the wall AC units with heat work in extreme winter temperatures?

Most units operate efficiently in temperatures down to around 23°F (-5°C), but performance may vary by model. Check the manufacturer’s specifications for low-temperature operation if you live in a colder climate.

What features should I look for in a high-quality through the wall air conditioner with heat?

Prioritize models with inverter compressors, multiple fan speeds, programmable thermostats, and Wi-Fi controls for convenience. Also, look for corrosion-resistant construction and quiet operation (below 55 dB) for enhanced comfort.