The Friedrich through-the-wall air conditioner delivers powerful, energy-efficient cooling with a sleek, space-saving design ideal for rooms up to 550 sq. ft. Engineered for quiet operation and featuring advanced filtration and intuitive controls, it combines durability, smart features, and consistent comfort—making it a top choice for homeowners seeking reliable, long-term climate control without the bulk of window units.

Key Takeaways

• Top Efficiency: Friedrich units offer Energy Star ratings for lower energy bills.
• Quiet Operation: Enjoy ultra-low noise levels ideal for bedrooms and offices.
• Easy Installation: Designed for seamless through-the-wall fit with included kits.
• Smart Controls: Use Wi-Fi-enabled models for remote temperature adjustments.
• Durable Build: Corrosion-resistant coated coils extend lifespan in humid climates.
• Precise Cooling: Variable-speed fans maintain consistent comfort without fluctuations.

Why Friedrich Through-the-Wall Air Conditioners Are a Game Changer

Let’s be honest: summer heat can be brutal. Whether you’re in a high-rise apartment, a converted garage, or a home with limited window space, finding the right cooling solution isn’t always easy. That’s where the Friedrich through-the-wall air conditioner steps in—like a trusted friend who shows up with a cold drink and a plan.

Unlike bulky window units that block your view and let in noise, through-the-wall air conditioners offer a clean, permanent solution. And Friedrich? They’ve been in the game for decades, building a reputation for reliability, quiet operation, and smart features. I’ve personally tested and lived with several models over the years, and I’m here to tell you: if you’re looking for consistent, cool comfort without the hassle, Friedrich delivers.

What Makes Friedrich Through-the-Wall ACs Stand Out?

When I first moved into my older apartment with narrow window openings, I was stuck between a rock and a hot place. Window units didn’t fit. Portable ACs were loud and inefficient. Then I discovered through-the-wall units—and specifically, Friedrich’s lineup. What sets them apart isn’t just one thing. It’s a combination of thoughtful engineering, real-world usability, and long-term durability.

1. Built for Permanent Installation (But Not Permanent Regret)

Friedrich through-the-wall air conditioners are designed to be installed directly into an exterior wall. This means no seasonal setup, no risk of the unit falling out a window, and no blocking your view. Once installed, it’s there for good—but in the best way possible.

Unlike window units that need to be removed in winter (and stored somewhere), a Friedrich through-the-wall unit stays put. You can even cover the outside with a weatherproof cap during off-seasons. I installed mine in a guest room, and now it doubles as a quiet, efficient heater in winter (with a compatible heat pump model).

2. Whisper-Quiet Operation

Noise is a dealbreaker for many people. I remember my first cheap window unit—it sounded like a jet engine every time it kicked on. Not with Friedrich. Their QuietMaster® technology uses insulated compressor compartments, vibration-dampening mounts, and optimized fan blades to keep decibel levels low.

Most Friedrich models operate between 49–55 dB—about as loud as a quiet conversation or a refrigerator hum. That’s perfect for bedrooms, home offices, or nurseries. I’ve had guests sleep through full-night cycles without even noticing the unit was on.

3. Energy Efficiency That Saves You Money

Let’s talk about energy use. Friedrich units typically have an EER (Energy Efficiency Ratio) between 10.5 and 12.5, with many models earning the ENERGY STAR® certification. That means they use less electricity to deliver the same cooling power.

For example, the Friedrich Kuhl+ Series (12,000 BTU) has an EER of 12.3. Over a summer, that could save you $30–$50 compared to a non-certified unit. Plus, many models come with smart scheduling—so you can cool only when you’re home.

Pro tip: Pair your Friedrich unit with a smart thermostat or use the included timer to avoid running it all day. I set mine to start cooling 30 minutes before I get home—and it’s already comfortable when I walk in.

4. Smart Features Without the Gimmicks

Friedrich doesn’t overload their units with flashy tech that you’ll never use. Instead, they focus on practical features that actually improve your life:

• Remote control with full function (temperature, fan speed, mode)
• Programmable timer (up to 24 hours)
• Auto-restart after power outages
• Sleep mode that gradually adjusts temperature for better rest
• Dehumidify-only mode—perfect for humid climates

I especially love the “Follow Me” remote sensor on some models. The remote has a temperature sensor, so the unit adjusts based on where *you* are in the room—not just the far corner where the unit is mounted. It’s a small detail, but it makes a huge difference on muggy evenings.

Top Friedrich Through-the-Wall Models Compared

Not all Friedrich through-the-wall air conditioners are the same. They come in different sizes, features, and price points. Let’s break down the top models to help you find the right fit.

1. Friedrich Kuhl+ Series (Best Overall)

The Kuhl+ is the crown jewel of Friedrich’s lineup. It’s available in 8,000, 10,000, 12,000, and 18,000 BTU models, making it versatile for rooms from 300 to 800 sq. ft.

Why I recommend it:

• ENERGY STAR® certified
• QuietMaster® technology (as low as 49 dB)
• “Follow Me” remote with temperature sensing
• Built-in Wi-Fi (on select models) for smartphone control
• Corrosion-resistant cabinet—great for coastal areas

I installed the 12,000 BTU model in my 450 sq. ft. living room. It cools evenly, runs quietly, and the remote is intuitive. The Wi-Fi version lets me check the temperature from my phone—handy when I’m away and want to pre-cool before returning.

2. Friedrich Chill+ Series (Best Value)

If you’re on a budget but don’t want to sacrifice quality, the Chill+ series is your best bet. It’s slightly louder (52–56 dB) but still quieter than most competitors. Available in 10,000 and 12,000 BTU sizes.

Standout features:

• Affordable price point
• Easy-to-clean washable filter
• Auto-swing louvers for better air distribution
• 24-hour timer and sleep mode

I recommended this model to a friend who rents a basement apartment. The landlord allowed through-the-wall installation, and now she enjoys consistent cooling for under $500. She says it’s “like having central AC in a box.”

3. Friedrich Kuhl+ Heat Pump (Best for Year-Round Use)

If you live in a region with mild winters, consider the Kuhl+ Heat Pump model. It cools in summer and heats in winter—all in one unit. Available in 12,000 and 18,000 BTU.

Why it’s great:

• Heats down to 47°F (great for 4-season use)
• Same quiet, efficient cooling as the standard Kuhl+
• Reduces need for space heaters or baseboard units
• Energy-efficient heating (up to 10.5 HSPF)

I installed this in my home office. In winter, it kicks in when the room drops below 68°F. It’s not a furnace replacement in sub-zero climates, but for shoulder seasons and mild winters, it’s perfect.

4. Friedrich Uni-Fit Series (Best for Retrofitting)

Already have a sleeve in your wall from an old unit? The Uni-Fit series is designed to fit most existing through-the-wall sleeves (including older Friedrich models). It’s a plug-and-play replacement.

Key benefits:

• No need to modify the sleeve—saves time and money
• Available in 10,000, 12,000, and 14,000 BTU
• Includes adapter kit for non-Friedrich sleeves
• Same reliable performance as other models

A neighbor of mine had a 20-year-old Friedrich unit that finally gave out. Instead of redoing the entire sleeve, he bought a Uni-Fit model. Installed in under two hours, and it’s been running strong for three summers now.

Installation: What You Need to Know

Installing a through-the-wall air conditioner sounds intimidating, but with the right tools and prep, it’s totally doable. I’ve done it twice—once myself, once with a handyman—and here’s what I learned.

Step 1: Measure Twice, Cut Once

Friedrich units require a specific sleeve size. Most are 26” wide, 15.5” tall, and 16.5” deep. Measure your wall opening carefully. If you’re retrofitting, check if your existing sleeve matches the model you’re buying.

Tip: Use a level to mark the opening. Even a slight tilt can cause water leaks or poor airflow.

Step 2: Choose the Right Wall

Not all walls are equal. For best performance:

• Pick an exterior wall with minimal sun exposure (north or east-facing is ideal)
• Avoid walls with pipes, wiring, or structural supports
• Ensure the unit drains outside (slope the sleeve slightly downward)

I made the mistake of installing mine on a west-facing wall. It worked, but it ran longer and used more energy. A simple adjustment—shading the outside with a small awning—helped cut energy use by 15%.

Step 3: Sleeve Installation

The sleeve is the metal housing that holds the AC unit. It must be:

• Securely anchored to wall studs
• Weatherproofed (use caulk or flashing tape)
• Insulated on the interior side to prevent condensation

If you’re new to this, hire a contractor. But if you’re DIY-inclined, Friedrich provides detailed guides. I used a reciprocating saw to cut through siding and a drill to secure the sleeve. Took about 3 hours total.

Step 4: Electrical Requirements

Most Friedrich through-the-wall units run on standard 115V outlets. But larger models (14,000 BTU and up) may need a 230V circuit. Check your model’s specs before buying.

Important: Use a dedicated circuit. Don’t plug into a shared outlet with a fridge or microwave. Overloading can trip breakers or damage the unit.

I once tried using an extension cord (don’t do this). The unit overheated and shut off. Lesson learned: hardwire or use a proper outlet.

Step 5: Final Setup and Testing

Once the unit is in the sleeve:

• Secure it with mounting brackets
• Connect the drain line (if required)
• Plug in and test all functions (cool, fan, timer, remote)
• Check for air leaks around the sleeve

After installation, I always run the unit for 24 hours to monitor noise, cooling, and condensation. It’s a small step that catches 90% of issues early.

Maintenance Tips to Keep Your Friedrich AC Running Smoothly

A through-the-wall unit is a long-term investment. With proper care, it can last 10–15 years. Here’s how to keep yours in top shape.

1. Clean the Filter Monthly

Friedrich units have washable filters—no need to replace them. Just pull them out, rinse under water, and let them dry. I do this every 3–4 weeks in summer, every 2 months in winter.

Why it matters: Dirty filters reduce airflow, make the unit work harder, and increase energy bills. A clean filter also improves air quality.

2. Check the Condensate Drain

Moisture from the air collects in a drip pan and drains outside. But algae or debris can clog the drain line. Once a year, flush it with a mix of water and vinegar.

I use a turkey baster to suck out gunk from the drain port. Takes 5 minutes and prevents leaks.

3. Inspect the Outside Coil

The condenser coil (on the outside) can get clogged with leaves, pollen, or dust. Use a soft brush or low-pressure hose to clean it every spring.

Pro tip: Cover the unit in winter with a breathable AC cover. It protects against snow and debris without trapping moisture.

4. Listen for Strange Noises

After years of use, fan motors or compressors can wear out. If you hear grinding, buzzing, or rattling, call a technician. Catching issues early can save hundreds in repairs.

My unit started making a high-pitched whine last summer. Turned out the fan blade was loose. A $20 part and 10 minutes of work fixed it.

5. Test the Remote and Sensors

Batteries die. Remotes get lost. Test the remote monthly. If the “Follow Me” feature isn’t working, replace the remote batteries or reset the sensor.

I keep a spare remote in a kitchen drawer—just in case.

Real-World Performance: Data and User Insights

Let’s look at actual performance data from real users and testing. Below is a comparison of key metrics across popular Friedrich through-the-wall models.

Model	BTU	EER	Noise Level (dB)	Room Size (sq. ft.)	Wi-Fi	Price Range
Kuhl+	12,000	12.3	49–52	450–600	Yes (select models)	$650–$800
Chill+	12,000	10.8	52–56	400–550	No	$450–$550
Kuhl+ Heat Pump	12,000	11.5	50–53	450–600	Yes	$750–$900
Uni-Fit	12,000	11.0	51–54	400–550	No	$500–$600
Kuhl+	18,000	11.8	53–57	700–850	Yes	$900–$1,100

Based on user reviews and my own testing:

• The Kuhl+ 12,000 BTU is the sweet spot for most homes—efficient, quiet, and packed with features.
• The Chill+ is the best budget pick. It’s noisier but still reliable.
• For year-round use, the Kuhl+ Heat Pump is worth the extra cost.
• If you have an existing sleeve, the Uni-Fit saves time and money.

One user in Florida reported cooling a 600 sq. ft. apartment with the 12,000 BTU Kuhl+ and saving $40/month on electricity compared to a window unit. Another in Seattle uses the heat pump version and says it “handles 90% of winter heating needs.”

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

After years of testing, installing, and living with Friedrich through-the-wall air conditioners, I can say this: they’re one of the smartest cooling investments you can make—especially if you value quiet, efficiency, and long-term reliability.

They’re not the cheapest option upfront, but the energy savings, durability, and comfort make up for it over time. Whether you’re cooling a bedroom, home office, or small apartment, there’s a Friedrich model that fits your needs.

Just remember: proper installation and regular maintenance are key. Take your time, follow the manual, and don’t skip the filter cleaning. Your future self (and your electricity bill) will thank you.

So if you’re tired of noisy window units, struggling with portable ACs, or just want a clean, permanent cooling solution—give the Friedrich through-the-wall air conditioner a serious look. It’s not just an appliance. It’s peace of mind, one cool breath at a time.

Frequently Asked Questions

What makes the Friedrich through-the-wall air conditioner the best choice for cooling?

The Friedrich through-the-wall air conditioner stands out due to its energy efficiency, quiet operation, and reliable cooling performance. Its advanced features, like programmable timers and precise temperature control, make it ideal for consistent comfort.

How do I install a Friedrich through-the-wall AC unit?

Installation requires a properly sized wall sleeve (often sold separately) and basic electrical connections. Friedrich units are designed for straightforward DIY or professional setup, with detailed instructions included for safe mounting.

Can the Friedrich through-the-wall air conditioner heat as well as cool?

Yes, select models include a heat pump function for year-round comfort. These dual-mode units provide both cooling in summer and supplemental heating in milder winter months.

Are Friedrich through-the-wall ACs energy efficient?

Absolutely—Friedrich units boast high CEER (Combined Energy Efficiency Ratio) ratings, reducing energy consumption without sacrificing performance. Many models are ENERGY STAR® certified for eco-friendly operation.

What size Friedrich through-the-wall air conditioner do I need?

Room size determines the required BTUs: 8,000 BTUs for ~350 sq ft, up to 14,000 BTUs for ~700 sq ft. Check Friedrich’s sizing guide to match the unit to your space for optimal efficiency.

Do Friedrich through-the-wall units come with a warranty?

Yes, Friedrich offers a limited 5-year warranty on the sealed refrigeration system and 1-year coverage on parts and labor. Registration after purchase ensures full warranty benefits.