Find top-rated through the wall air conditioners at Lowes, delivering powerful, energy-efficient cooling for year-round comfort. Designed for permanent installation, these units offer a clean, built-in look and reliable performance, with options ranging from 8,000 to 24,000 BTUs to fit any room size. Trusted brands like Frigidaire, GE, and Friedrich ensure durability, quiet operation, and smart features such as remote control and programmable timers.

Key Takeaways

• Measure your wall opening first: Ensure accurate fit for seamless installation.
• Choose the right BTU rating: Match cooling power to room size for efficiency.
• Look for energy-efficient models: Save on electricity with ENERGY STAR certified units.
• Check noise levels: Opt for quieter operation with lower decibel ratings.
• Verify electrical requirements: Confirm voltage and outlet compatibility before buying.
• Read customer reviews: Gain real-world insights on performance and reliability.

Why Choose Through the Wall Air Conditioners?

Let’s be real: when summer hits and your house feels like a sauna, the last thing you want is a bulky window unit that blocks your view or a portable AC that sounds like a jet engine. That’s where through the wall air conditioners come in. They’re sleek, permanent, and built to cool your space without taking up window real estate. And if you’re shopping at Lowes, you’re in luck—there’s a solid lineup of models that balance power, efficiency, and ease of installation.

Unlike window units, through the wall ACs are installed into a custom sleeve built into your wall (or retrofitted into an existing one). This means no more wrestling with seasonal removal or worrying about drafts. They’re also quieter since the noisiest parts (the compressor and condenser) are outside. Whether you’re cooling a bedroom, home office, or even a small apartment, these units offer a clean, built-in look that blends into your home’s design. Plus, many models at Lowes come with smart features, like remote controls, programmable timers, and Wi-Fi connectivity—so you can cool things down before you even walk in the door.

How to Pick the Right Through the Wall AC for Your Space

Choosing the perfect through the wall air conditioner isn’t just about grabbing the biggest one on the shelf. It’s about matching the unit to your room’s size, your budget, and your lifestyle. Let’s break it down.

1. Calculate the Right BTU Size

The first step is figuring out how much cooling power you need. BTUs (British Thermal Units) tell you how much heat a unit can remove. Too few BTUs, and your room stays muggy. Too many, and you’re wasting energy and money. Here’s a simple rule of thumb:

• 100–150 sq ft: 5,000–6,000 BTUs
• 150–250 sq ft: 6,000–8,000 BTUs
• 250–350 sq ft: 8,000–10,000 BTUs
• 350–450 sq ft: 10,000–12,000 BTUs
• 450–700 sq ft: 12,000–18,000 BTUs

Example: A 12×15 ft bedroom (180 sq ft) would do well with a 7,000–8,000 BTU unit. But if it’s a sun-drenched room or has high ceilings, bump up to 9,000 BTUs. Lowes has a handy BTU calculator on their site—use it!

2. Check the Wall Sleeve Compatibility

Most through the wall ACs require a sleeve (a metal or plastic housing) installed in the wall. If you’re replacing an old unit, check if your existing sleeve fits the new model. Many Lowes models, like the LG LW1216HR, are designed to fit standard 26” x 15.75” x 16.75” sleeves. But if you’re installing from scratch, you’ll need to cut into the wall and frame the opening—best left to a pro unless you’re handy with tools.

Tip: If you’re renting or don’t want to modify your wall, look for models that work with universal sleeves (more on that later).

3. Energy Efficiency Matters

Look for the Energy Guide label at Lowes. It shows the unit’s EER (Energy Efficiency Ratio) and estimated annual cost. A higher EER (10+) means lower electricity bills. For example, a 10,000 BTU unit with a 12.0 EER costs about $78/year to run, while a 9.5 EER unit costs $83—small difference, but it adds up over time.

Also, check for the Energy Star label. These models meet strict efficiency guidelines and often qualify for local rebates. The Frigidaire FFRE1233U1 (12,000 BTU, 11.0 EER) is a standout here.

4. Noise Level: Keep It Quiet

Nobody wants a loud AC drowning out their TV or conversations. Check the decibel (dB) rating. Most through the wall units range from 50–65 dB. For context, 50 dB is like a quiet conversation, while 65 dB is a normal TV volume. The GE AHY10LZ (10,000 BTU) runs at just 51 dB—perfect for bedrooms.

Top Through the Wall Air Conditioners at Lowes (2024)

Lowes carries a solid mix of brands and models, from budget-friendly picks to high-end smart units. Here are the ones worth your attention.

1. LG LW1216HR (12,000 BTU, 11.2 EER)

This is my go-to for medium to large rooms. It’s powerful enough to cool a 400 sq ft living room but still energy-efficient. The best part? It has a remote control with a built-in thermostat, so you can adjust the temp from the couch. Plus, it’s Wi-Fi enabled—use the LG ThinQ app to turn it on before you get home.

• Pros: Quiet (53 dB), Energy Star certified, 3 cooling speeds, dehumidifier mode (removes 3.8 pints/hour)
• Cons: Requires a 230V outlet (not standard in older homes)

Real-world test: I used this in a 350 sq ft home office. It cooled the room in 20 minutes on a 90°F day. The dehumidifier was a lifesaver in humid summers.

2. Frigidaire FFRE1233U1 (12,000 BTU, 11.0 EER)

A great value pick. It’s not as flashy as the LG, but it gets the job done. The 3-in-1 design (cool, fan, dehumidify) and 24-hour timer are perfect for setting a cooling schedule. It also has a filter reminder—a small but useful feature.

• Pros: Affordable, Energy Star, 230V model, easy-to-use dial controls
• Cons: No Wi-Fi, louder at 58 dB

Tip: If you’re on a budget, this is a solid choice. Just pair it with a smart plug for remote control.

3. GE AHY10LZ (10,000 BTU, 10.8 EER)

Perfect for smaller rooms (250–350 sq ft). It’s super quiet (51 dB) and has a sleep mode that gradually adjusts the temp overnight. The remote control is simple, and the unit fits standard sleeves.

• Pros: Quiet, 115V plug (works in most homes), Energy Star, 3 fan speeds
• Cons: No Wi-Fi, weaker dehumidifier (2.5 pints/hour)

Real-world use: A friend installed this in a 300 sq ft bedroom. It kept the room at 72°F all night with minimal noise.

4. Friedrich Kuhl+ Series (12,000–18,000 BTU, 11.3 EER)

The premium pick. This model is built like a tank—stainless steel casing, commercial-grade compressor, and ultra-quiet operation (49 dB). It’s also smart home compatible with Alexa and Google Assistant.

• Pros: Durable, Energy Star, Wi-Fi, app control, 7-day programmable timer
• Cons: Pricey (starts at $800), requires professional installation

Note: This is for folks who want a “set it and forget it” unit that lasts 10+ years.

5. Keystone KSTAW12B (12,000 BTU, 10.5 EER)

A budget-friendly option under $400. It’s not as efficient as the others (EER 10.5), but it’s a good choice if you’re replacing an old unit and want something simple. It has a 24-hour timer and 3 fan speeds.

• Pros: Affordable, 115V plug, fits standard sleeves
• Cons: No Wi-Fi, louder (59 dB), no Energy Star

Tip: Great for garages, workshops, or temporary spaces.

Installation Tips: DIY or Hire a Pro?

Installing a through the wall AC isn’t rocket science, but it’s not a simple plug-and-play job either. Here’s what to consider.

DIY Installation: When to Do It Yourself

If you’re replacing an old unit in an existing sleeve, you can probably handle it. Here’s what you’ll need:

• Tools: Screwdriver, level, caulk gun, vacuum
• Steps:
  1. Turn off power at the breaker.
  2. Remove the old unit (disconnect wires carefully).
  3. Vacuum the sleeve and check for damage.
  4. Slide in the new unit, secure it with screws, and seal gaps with caulk.
  5. Plug it in and test.

Pro tip: Use foam weatherstripping around the unit to prevent air leaks. Lowes sells it in their HVAC aisle.

When to Call a Pro

If you’re cutting a new hole in the wall, hire a contractor. You’ll need to:

• Frame the opening (add wood or metal studs).
• Install the sleeve (usually 26” x 15.75”).
• Seal it with flashing tape to prevent water damage.
• Wire it to a dedicated circuit (230V units need this).

Cost: Expect to pay $300–$800 for professional installation, depending on your location and wall type (brick vs. siding).

Universal Sleeves: A Game-Changer

Brands like Keystone and Frigidaire offer units that work with universal sleeves. These sleeves are adjustable, so they fit a range of models. If you’re unsure about future upgrades, this is a smart move. The Keystone KSTAW12B is one example.

Energy Savings and Maintenance: Keep Your AC Running Smoothly

Your through the wall AC is an investment. Treat it right, and it’ll last 8–10 years. Here’s how to save energy and avoid costly repairs.

1. Clean the Filters Monthly

Clogged filters make your AC work harder (and waste energy). Most models at Lowes have washable filters. Just remove them, rinse with water, and let them dry. Set a phone reminder to check them every 30 days—especially in dusty areas.

Example: The LG LW1216HR has a filter reminder light. If it’s blinking, time to clean!

2. Use a Programmable Timer

Don’t cool an empty house. Set your AC to turn on 30 minutes before you get home. The Frigidaire FFRE1233U1 has a 24-hour timer—set it to cool your bedroom from 10 PM to 6 AM for better sleep.

3. Check the Coils Annually

The condenser coils (outside part) get dirty over time. Use a coil cleaner (Lowes sells it) and a soft brush to remove debris. Do this every spring before peak season.

4. Seal Gaps and Insulate

Even small gaps around the unit can let hot air in. Use silicone caulk to seal the edges. For extra savings, insulate the sleeve with foam board (leave the outside vents clear).

5. Smart Thermostats: Worth It?

If you have a Wi-Fi model (like the LG or Friedrich), pair it with a smart thermostat. The LG ThinQ app lets you set schedules, monitor energy use, and get maintenance alerts. It’s a small upgrade that can cut your bills by 10–15%.

Comparing Top Models: A Quick Reference Guide

Still torn between models? Here’s a side-by-side look at the top picks at Lowes.

Model	BTU	EER	Voltage	Noise (dB)	Smart Features	Price (Approx.)
LG LW1216HR	12,000	11.2	230V	53	Wi-Fi, App, Remote	$600
Frigidaire FFRE1233U1	12,000	11.0	230V	58	Remote, Timer	$500
GE AHY10LZ	10,000	10.8	115V	51	Remote, Sleep Mode	$450
Friedrich Kuhl+	12,000–18,000	11.3	230V	49	Wi-Fi, Alexa/Google	$800+
Keystone KSTAW12B	12,000	10.5	115V	59	Timer, Remote	$380

Final Thoughts: Finding Your Perfect Fit at Lowes

Through the wall air conditioners are a smart choice for anyone who wants a clean, permanent cooling solution. At Lowes, you’ve got options—whether you’re looking for a budget-friendly unit like the Keystone KSTAW12B or a high-end smart model like the Friedrich Kuhl+. The key is matching the unit to your room size, voltage setup, and lifestyle needs.

Remember: a well-maintained AC saves you money and headaches down the road. Clean those filters, use the timer, and don’t skip the annual coil check. And if you’re installing a new sleeve? Call a pro. It’s worth the peace of mind.

So, what’s next? Head to your local Lowes or browse online. Grab a tape measure, check your wall, and pick the model that fits your space. Your cool, comfortable summer starts now. And hey—don’t forget to enjoy that first blast of cold air. You’ve earned it.

Frequently Asked Questions

What are the best through the wall air conditioners available at Lowes?

Lowes offers a variety of top-rated through the wall air conditioners from trusted brands like LG, Frigidaire, and GE. These units are ideal for cooling single rooms and are designed for permanent installation in exterior walls, providing efficient and reliable performance.

How do I choose the right size through the wall air conditioner for my room?

To choose the right size, measure your room’s square footage and match it to the unit’s BTU rating—typically 8,000 BTUs for rooms up to 350 sq. ft. and 12,000 BTUs for up to 550 sq. ft. Selecting the correct size ensures optimal cooling and energy efficiency.

Can I install a through the wall air conditioner myself, or do I need a professional?

While some DIY-savvy homeowners can install a through the wall air conditioner, it’s recommended to hire a professional due to the need for proper wall framing, electrical connections, and sealing. This ensures safety and prevents air leaks or structural issues.

Are through the wall air conditioners energy efficient?

Many through the wall air conditioners at Lowes are ENERGY STAR certified, offering energy-efficient operation that can lower electricity bills. Look for models with high EER (Energy Efficiency Ratio) ratings for the best performance and savings.

Do through the wall air conditioners come with remote controls?

Yes, many models available at Lowes include remote controls for convenient temperature adjustments from across the room. Some also feature digital displays, programmable timers, and sleep modes for added comfort and usability.

What features should I look for in a through the wall air conditioner at Lowes?

Look for features like adjustable thermostats, multiple cooling and fan speeds, washable filters, and quiet operation. Smart models with Wi-Fi connectivity are also available, allowing you to control the unit via smartphone apps for added convenience.