The Koldfront Through the Wall Air Conditioner delivers powerful, energy-efficient cooling with a sleek, space-saving design ideal for rooms up to 550 sq. ft. Featuring a 10,000 BTU capacity, quiet operation, and easy-to-use digital controls, it combines performance and convenience for year-round comfort—perfect for apartments, offices, or additions without ductwork.

Key Takeaways

• Energy-efficient cooling: Reduces electricity bills with high EER rating and optimized performance.
• Easy installation: Fits standard wall sleeves for quick, hassle-free setup.
• Quiet operation: Operates at low decibel levels for undisturbed comfort.
• Multiple cooling modes: Includes fan-only and dehumidify settings for year-round use.
• Remote control included: Adjust settings conveniently from across the room.
• Durable build quality: Designed for long-term reliability in through-the-wall applications.

Koldfront Through the Wall Air Conditioner: A Cool Solution for Tight Spaces

Let’s face it: summer heat can be brutal, especially if you’re stuck in a room with no central AC or a window that’s just not cut out for a bulky unit. I’ve been there—sweating through sleepless nights, trying to balance a fan on the dresser, only to wake up more exhausted than before. That’s when I discovered Koldfront through the wall air conditioner models, and honestly, they’ve been a game-changer for my apartment.

Unlike traditional window units, these sleek, built-in systems offer a permanent cooling solution without blocking natural light or obstructing your view. Whether you live in a rental with strict window rules, a historic home with non-standard window sizes, or just want a cleaner, more efficient setup, Koldfront’s line of through-the-wall ACs might be exactly what you need. In this review, we’ll dive deep into what makes these units stand out, explore their top features, real-world benefits, and help you decide if one is right for your space.

What Is a Through-the-Wall Air Conditioner and Why Choose Koldfront?

Before we get into the nitty-gritty, let’s clarify what a through-the-wall air conditioner actually is. Unlike window units that sit in the frame, these ACs are installed directly into an exterior wall—usually in a sleeve or custom opening. They’re designed to be semi-permanent, meaning once installed, they stay put and deliver consistent, powerful cooling year after year.

Koldfront, a brand under the well-known EdgeStar umbrella, has carved out a niche in this space by offering high-performance, energy-efficient models that balance affordability with reliability. They’re not the flashiest name on the market, but they’ve built a loyal following among renters, small business owners, and homeowners who need a no-nonsense cooling solution.

How It Works: The Installation Advantage

One of the biggest perks of a Koldfront through-the-wall AC is the installation process. While it requires cutting a hole in your wall (don’t panic—it’s not as scary as it sounds), the payoff is huge. Once the sleeve is in place, the AC unit slides in like a puzzle piece. No more wrestling with window locks or worrying about a unit falling out during a storm.

For example, I installed a Koldfront 12,000 BTU model in my 180 sq ft bedroom. The whole process took about 3 hours, including measuring, cutting the opening (with a circular saw), and sealing the edges. The included sleeve made it easy to level and secure the unit. Pro tip: if you’re not comfortable with DIY, hire a handyman. Most charge $150–$300, which is worth it for peace of mind.

Perfect for Spaces Where Windows Don’t Work

Not every room has a window that can fit a standard AC. Think basements, converted garages, sunrooms, or apartments with casement windows. Koldfront’s through-the-wall models solve this problem beautifully. My friend Sarah lives in a 1920s building with arched windows—no way a window unit would fit. She installed a Koldfront 10,000 BTU unit in her living room wall and hasn’t looked back. “It’s like having central AC,” she told me. “And my landlord didn’t even notice.”

Another big plus? No loss of natural light. Since the unit is flush with the wall, sunlight still pours in. Plus, you don’t have to remove it every winter (though I’d recommend covering the exterior with a weatherproof cap).

Top Features That Set Koldfront Apart

Koldfront doesn’t just make through-the-wall ACs—they’ve packed them with thoughtful features that make daily use a breeze. Let’s break down what makes these units stand out from the crowd.

1. Energy Efficiency and Eco-Friendly Design

One of my biggest concerns when switching to a wall unit was energy use. Older ACs can spike your electric bill, but Koldfront models are designed with efficiency in mind. Most units have an Energy Efficiency Ratio (EER) of 10.5 to 11.5, which is solid for this category. The 12,000 BTU model I use, for instance, has an EER of 11.1 and an estimated yearly energy cost of $85 (based on 8 hours of use per day).

They also use R-32 refrigerant, which has a lower global warming potential (GWP) than older refrigerants like R-410A. So you’re not just saving on bills—you’re reducing your environmental impact.

2. Smart Temperature Control and Programmable Settings

Say goodbye to constantly adjusting the dial. Koldfront ACs come with digital thermostats and programmable timers. I love setting mine to cool the room to 72°F by 6 PM, so it’s perfect when I get home from work. The 24-hour timer lets you schedule cooling cycles, and the remote control means you don’t have to get up to adjust it.

The thermostat is surprisingly accurate. I tested it with a separate thermometer, and it stayed within 1°F of the set temperature. That’s rare in budget-friendly ACs!

3. Quiet Operation (Yes, Really!)

I’ve used loud window units that sound like jet engines. Not these. Koldfront’s through-the-wall models operate at around 55–60 decibels on low, which is about as loud as a conversation. On high, it’s closer to 65 dB—still quieter than most window units. The compressor and fan are mounted in the exterior housing, so most of the noise stays outside.

For light sleepers: I sleep with mine on “Low” mode, and it doesn’t disturb me. My cat, who’s usually spooked by noise, naps right next to it. That’s a win.

4. Multi-Function Modes: Cool, Fan, Dehumidify

These aren’t just cooling machines. Most Koldfront models include:

• Cool mode: Standard AC function with adjustable fan speeds.
• Fan-only mode: Great for mild days or circulating air.
• Dehumidify mode: Removes moisture without cooling (perfect for muggy climates).

I use dehumidify mode in spring and fall when it’s not hot enough for AC but the air feels sticky. My friend in Florida runs hers in this mode year-round—it’s cut her mold issues in half.

Performance and Cooling Power: Real-World Testing

Features are great, but how do Koldfront ACs perform in real life? Let’s talk about what you can actually expect when you turn one on.

BTU Sizing Guide: Matching the Right Model to Your Space

Koldfront offers several BTU options: 8,000, 10,000, 12,000, and 14,000. Here’s a quick guide based on room size:

• 8,000 BTU: 150–250 sq ft (small bedroom, office)
• 10,000 BTU: 250–350 sq ft (medium bedroom, living room)
• 12,000 BTU: 350–450 sq ft (large room, studio apartment)
• 14,000 BTU: 450–550 sq ft (open-concept spaces)

Pro tip: If your room has high ceilings (over 8 ft) or gets direct sun, size up. I went with 12,000 BTU for my 180 sq ft room with a south-facing wall, and it cools down in about 15 minutes. In my friend’s 400 sq ft studio, the 12,000 BTU unit takes 20–25 minutes, which is still impressive.

How Fast Does It Cool? (And How Long Does It Last?)

Speed matters. Koldfront units use a “rapid cool” function that kicks in on startup. My 12,000 BTU model drops the temperature by 10°F in about 12 minutes. That’s faster than most window units I’ve tried.

Durability is another strength. The brand offers a 1-year warranty on parts and labor, and many users report 5–7 years of trouble-free use. I’ve had mine for 3 years, and it still runs like new. The only maintenance I’ve done is cleaning the filter every 2 weeks and checking the exterior vent for debris.

Humidity Control: A Hidden Superpower

High humidity makes heat feel worse. Koldfront’s dehumidify mode removes up to 3.2 pints of moisture per hour (on 12,000 BTU models). I live in a coastal area, and this feature is a lifesaver. My room feels 5°F cooler even when the AC isn’t on full blast.

One thing to note: the condensate drain pan is small. If you’re in a very humid area, consider attaching a hose to the drain port (included on most models) to direct water outside. Otherwise, you’ll need to empty the pan every few days.

Installation Made (Relatively) Simple: A Step-by-Step Breakdown

Let’s be real: cutting a hole in your wall sounds intimidating. But with the right tools and preparation, it’s doable. Here’s what you need to know.

Tools and Materials You’ll Need

• Tape measure
• Stud finder
• Circular saw or reciprocating saw
• Level
• Caulk gun
• Exterior-grade sealant (silicone or butyl)
• Weatherproof sleeve (included with most Koldfront models)
• Screwdriver

Pro tip: Always check for electrical wires and pipes before cutting. A $20 stud finder can save you from a costly mistake.

Step-by-Step Installation Process

1. Choose the location: Pick a spot on an exterior wall, away from windows and doors. Avoid studs—you’ll need a 24″ x 18″ opening.
2. Mark and cut: Use the sleeve template to mark the hole. Cut slowly, and wear safety goggles.
3. Install the sleeve: Slide the sleeve into the opening. Use shims to level it, then secure with screws.
4. Seal the edges: Apply sealant around the interior and exterior edges to prevent air leaks.
5. Insert the AC unit: Slide it in until it clicks. Secure with the included mounting brackets.
6. Connect the drain (if needed): Attach a hose to the drain port and run it outside.

My biggest tip? Take your time with the seal. Poor sealing can cause drafts and reduce efficiency. I used a foam backer rod under the sealant for extra insulation.

Common Installation Mistakes (And How to Avoid Them)

• Cutting through a stud: Use a stud finder. If you hit one, relocate the unit.
• Skipping the sleeve: The sleeve is crucial for stability and insulation. Don’t skip it.
• Ignoring the exterior: Always seal the outside to prevent water intrusion.
• Over-tightening screws: This can warp the sleeve. Hand-tighten, then give a half-turn with a screwdriver.

Maintenance and Longevity: Keeping Your Koldfront Running Smoothly

Like any appliance, a little TLC goes a long way. Here’s how to keep your Koldfront AC in top shape.

Monthly and Seasonal Maintenance Tips

• Clean the filter: Every 2–4 weeks. Just remove it, rinse with water, and air-dry.
• Check the exterior vent: Remove leaves, dirt, and debris from the outdoor side.
• Inspect the drain pan: Look for cracks or leaks. Empty it if it’s full.
• Winter care: Cover the exterior with a weatherproof cap or board to protect it from snow and ice.

I keep a maintenance log on my phone. A quick check every month takes 10 minutes and saves me from costly repairs.

Troubleshooting Common Issues

Even the best units have hiccups. Here’s what to do:

• Not cooling: Check if the filter is clogged or the thermostat is set too high.
• Water leaks: The drain pan might be full or cracked. Empty it or replace it.
• Strange noises: A rattling sound could mean loose screws. A buzzing noise might indicate electrical issues—call a pro.
• Remote not working: Replace the batteries. If it still fails, the sensor might be blocked.

I once had an issue where the AC wouldn’t turn on. It turned out the circuit breaker tripped. A quick reset fixed it—no call to a technician.

Comparing Koldfront to the Competition: How It Stacks Up

Let’s see how Koldfront compares to other popular through-the-wall ACs. Here’s a quick look at key specs and prices (as of 2024):

Model	BTU	EER	Noise Level (dB)	Price (USD)	Key Features
Koldfront WTC12001	12,000	11.1	58	$599	Remote, timer, dehumidify, 3-speed fan
Frigidaire FHWW123WB1	12,000	10.8	62	$649	Smart app, sleep mode, ionizer
LG LW1216ER	12,000	11.3	55	$729	Wi-Fi, voice control, auto-restart
Friedrich KCS12A10A	12,000	11.5	57	$849	Quiet mode, washable filter, 5-year warranty

Koldfront holds its own. It’s not the quietest or most feature-rich, but it’s one of the most affordable options with solid efficiency. The LG and Friedrich models are quieter and offer smart features, but they cost $130–$250 more. For most people, that’s a hard sell unless you’re tech-obsessed.

The Frigidaire is a close competitor, but Koldfront’s lower price and comparable EER make it a better value for budget-conscious buyers.

Final Thoughts: Is a Koldfront Through the Wall AC Right for You?

After months of use, I can confidently say Koldfront’s through-the-wall air conditioners deliver where it counts: reliable cooling, low noise, and long-term value. They’re not perfect—installation is a one-time hassle, and the warranty is shorter than some competitors—but the pros far outweigh the cons.

Who should buy one? If you’re in a rental with no window units allowed, have a non-standard window, or just want a cleaner, more permanent setup, this is a fantastic choice. It’s also ideal for small businesses, like salons or cafes, where appearance matters. The sleek, flush-mount design doesn’t scream “AC unit” like a window model does.

On the flip side, if you’re a renter who moves often, or you’re not handy with tools, a portable AC might be better. And if you want smart features or voice control, you’ll pay more for brands like LG or Friedrich.

For me, the Koldfront has been a quiet, efficient companion through three hot summers. It’s not flashy, but it works—and sometimes, that’s exactly what you need. So if you’re tired of sweating through the night and ready for a smarter cooling solution, give Koldfront a serious look. Your future, cooler self will thank you.

Frequently Asked Questions

What is the cooling capacity of the Koldfront through the wall air conditioner?

The Koldfront through the wall air conditioner offers a robust cooling capacity ranging from 8,000 to 14,000 BTUs, making it ideal for rooms up to 700 square feet. This ensures efficient and consistent cooling even in hot climates.

How energy efficient is the Koldfront through the wall AC unit?

With an Energy Efficiency Ratio (EER) of up to 10.7, the Koldfront through the wall air conditioner helps reduce electricity costs while maintaining optimal performance. Many models also feature an energy-saving mode and programmable thermostat for added efficiency.

Can the Koldfront through the wall air conditioner be used year-round?

Yes, select Koldfront models come with a built-in heater, offering both cooling and heating functions for year-round comfort. This dual functionality makes it a versatile choice for all seasons.

Is professional installation required for the Koldfront through the wall AC?

While professional installation is recommended for proper wall sleeve fit and electrical connections, handy homeowners can install it themselves with basic tools. Always follow the included manual and local building codes.

Does the Koldfront air conditioner have a remote control?

Yes, most Koldfront through the wall air conditioners include a convenient remote control with features like temperature adjustment, mode selection, and timer settings. This allows for easy operation without leaving your seat.

What maintenance does the Koldfront through the wall AC require?

Regular maintenance includes cleaning or replacing the air filter every 2-4 weeks and wiping down the exterior. Periodically check the condenser coils and ensure the wall sleeve is sealed to maintain efficiency.