Finding the best through the wall air conditioner at Lowe’s means focusing on energy efficiency, BTU capacity, and seamless installation. Top models from trusted brands like Frigidaire and GE offer quiet operation, smart controls, and precise cooling for long-term comfort and savings. Whether you’re retrofitting or upgrading, our expert tips help you choose the right unit for your space and budget.

Key Takeaways

• Measure your wall opening accurately before purchasing to ensure a proper fit.
• Choose the right BTU rating based on room size for optimal cooling efficiency.
• Look for energy-efficient models with ENERGY STAR certification to save on electricity.
• Check for built-in filters and easy maintenance features for better air quality.
• Prioritize units with quiet operation to minimize noise disruption in living spaces.
• Compare installation requirements and consider professional help for secure mounting.
• Read customer reviews at Lowe’s to gauge real-world performance and reliability.

Through the Wall Air Conditioner Lowes Best Picks and Tips

It’s that time of year again—when the sun blazes, humidity clings to your clothes, and your ceiling fan just isn’t cutting it anymore. You’ve probably been sweating through another sleepless night, tossing and turning while your window AC unit rattles like it’s trying to escape. Or maybe you’re tired of tripping over cords and blocking your view with a bulky window unit. If you’ve been thinking about upgrading to something more permanent and powerful, a through the wall air conditioner might be your perfect solution.

Unlike window units that stick out awkwardly and can be a security risk, through-the-wall ACs are installed directly into an exterior wall, offering a cleaner look, better insulation, and often more cooling power. And if you’re shopping at Lowe’s, you’re in luck—they carry a solid selection of reliable, energy-efficient models from trusted brands like LG, Frigidaire, and GE. Whether you’re cooling a bedroom, home office, or sunroom, Lowe’s has options that fit both your space and your budget.

In this guide, we’ll walk you through everything you need to know about choosing, installing, and maintaining a through the wall air conditioner from Lowe’s. From top picks and energy-saving tips to installation hacks and common mistakes to avoid, we’ve got you covered. Think of this as your friendly neighbor sharing what they wish they knew before their first AC install—no jargon, no fluff, just real talk to help you stay cool and comfortable all summer long.

Why Choose a Through the Wall Air Conditioner?

Let’s be honest—window air conditioners have their place, but they’re not always the best fit. They can be noisy, block natural light, and sometimes even fall out if not secured properly (yikes!). A through the wall air conditioner solves many of these problems by being built directly into your wall, offering a more permanent and polished solution.

Space-Saving and Aesthetic Benefits

One of the biggest advantages of a through-the-wall unit is how much space it saves. Since it’s installed flush with the wall, you don’t lose valuable window real estate. That means you can keep your curtains open, enjoy the view, and even place furniture right up against the wall. Plus, it just looks cleaner—no bulky unit sticking out the side of your house.

For renters or homeowners in apartments, this can be a game-changer. Many landlords don’t allow window units due to safety or aesthetic concerns, but a professionally installed through-the-wall AC is often more acceptable. And if you’re planning to sell your home someday, a sleek, built-in AC unit can actually boost curb appeal.

Better Insulation and Energy Efficiency

Because through-the-wall units are sealed into the wall, they typically offer better insulation than window models. This means less air leakage, which translates to lower energy bills and more consistent cooling. Many models available at Lowe’s come with ENERGY STAR certification, so you’re not just staying cool—you’re saving money and reducing your carbon footprint.

For example, the LG 10,000 BTU Through the Wall Air Conditioner (available at Lowe’s) features a high EER (Energy Efficiency Ratio) and a programmable thermostat, helping you use only the energy you need. Over time, that adds up—especially during those scorching July weeks when your AC runs nonstop.

Quieter Operation

Let’s talk noise. Window units can sound like a small airplane taking off, especially older models. Through-the-wall units, on the other hand, are often quieter because the compressor and fan are housed inside the wall, away from your living space. Some models even come with sleep modes that reduce fan speed at night, so you can finally get a full eight hours without being jolted awake by a sudden blast of cold air.

If you’re working from home, studying, or just trying to relax, a quieter unit makes a huge difference. Imagine taking a Zoom call without having to mute every time the AC kicks on. That’s the kind of peace a through-the-wall unit can offer.

Top Through the Wall Air Conditioner Picks at Lowe’s

Lowe’s carries a variety of through-the-wall air conditioners, ranging from budget-friendly options to high-end models with smart features. To help you narrow it down, we’ve rounded up some of the best picks based on performance, energy efficiency, and customer reviews.

LG 10,000 BTU Through the Wall Air Conditioner (Model: LW1016ER)

This is one of the most popular models at Lowe’s—and for good reason. With 10,000 BTUs, it’s powerful enough to cool a medium to large room (up to 450 square feet), making it ideal for bedrooms, living rooms, or home offices. It features three cooling speeds, three fan speeds, and a 24-hour programmable timer, so you can set it to turn on just before you get home from work.

One standout feature is the LG SmartThinQ app compatibility. If you have a Wi-Fi connection, you can control the unit from your phone, adjust the temperature, or even receive maintenance alerts. It’s like having a personal climate assistant in your pocket. Plus, it’s ENERGY STAR certified, so you’ll save on electricity without sacrificing comfort.

Frigidaire 8,000 BTU Through the Wall Air Conditioner (Model: FFTA0811W1)

If you’re looking for something more compact, the Frigidaire 8,000 BTU model is a solid choice. It’s perfect for smaller rooms (up to 350 square feet) and comes with a remote control, electronic controls, and a washable filter. The filter is easy to remove and clean, which helps maintain airflow and indoor air quality.

What we love about this model is its effortless temperature control. It automatically adjusts the fan speed to maintain your desired temperature, so you don’t have to constantly tweak the settings. It’s also relatively quiet, with a noise level of around 58 decibels—about as loud as a normal conversation.

GE 12,000 BTU Through the Wall Air Conditioner (Model: AHY12LZ)

For larger spaces, the GE 12,000 BTU unit is a powerhouse. It can cool up to 550 square feet, making it great for open-concept living areas or master bedrooms. It includes a remote, digital display, and four-way air direction control, so you can direct the airflow exactly where you need it.

One feature that sets this model apart is its “Eco Mode”, which reduces energy consumption by cycling the compressor on and off based on room temperature. It also has a “Quick Cool” setting for those days when you walk in from the heat and need instant relief. Plus, it’s backed by GE’s reputation for durability and reliability.

Haier 6,000 BTU Through the Wall Air Conditioner (Model: HWF06AX1)

On a tight budget? The Haier 6,000 BTU model is one of the most affordable options at Lowe’s, priced under $300. It’s ideal for small rooms (up to 250 square feet), like a guest bedroom or home office. Despite its lower price, it still includes essential features like a remote, adjustable thermostat, and washable filter.

While it doesn’t have smart features or ultra-quiet operation, it gets the job done—and does it well. If you’re looking for a no-frills, reliable unit that won’t break the bank, this is a great entry-level pick.

How to Choose the Right Size and Features

Picking the right through the wall air conditioner isn’t just about BTUs—it’s about matching the unit to your space, lifestyle, and needs. Too small, and it’ll struggle to cool the room. Too big, and it’ll cycle on and off too frequently, wasting energy and wearing out the compressor.

Calculating the Right BTU for Your Room

The first step is determining how many BTUs you need. BTU stands for British Thermal Unit, and it measures how much heat the AC can remove per hour. As a general rule:

• 150–250 sq. ft.: 6,000–8,000 BTUs
• 250–350 sq. ft.: 8,000–10,000 BTUs
• 350–550 sq. ft.: 10,000–12,000 BTUs
• 550+ sq. ft.: 12,000+ BTUs (or consider multiple units)

But square footage isn’t the only factor. If your room gets a lot of sunlight, has high ceilings, or is on the top floor, you may need a unit with a higher BTU rating. Conversely, if the room is well-shaded or insulated, you might get away with a slightly lower capacity.

For example, if you’re cooling a south-facing bedroom with large windows, a 10,000 BTU unit might be better than an 8,000 BTU—even if the room is only 300 square feet. It’s always better to slightly oversize than undersize.

Key Features to Look For

Once you’ve nailed down the size, consider these features to get the most value from your purchase:

• Programmable Timer: Lets you set the AC to turn on or off at specific times—great for saving energy when you’re not home.
• Remote Control: Convenient for adjusting settings from across the room.
• Washable Filter: Saves money on replacements and improves air quality.
• Energy-Saving Modes: Like “Eco Mode” or “Sleep Mode” to reduce power usage.
• Smart Connectivity: Wi-Fi enabled models let you control the AC from your phone—perfect for checking if you left it on.
• Quiet Operation: Look for models with noise levels below 60 decibels for a peaceful environment.

At Lowe’s, you can filter your search by these features, making it easier to find a model that fits your lifestyle. Don’t forget to read customer reviews—they often highlight real-world performance issues or perks that specs alone won’t tell you.

Installation Requirements

Before you buy, make sure your wall can support a through-the-wall unit. These ACs require a dedicated electrical circuit (usually 20-amp or higher) and a properly sized wall sleeve. Most models come with a sleeve, but you’ll need to cut a hole in the wall—typically 26” wide by 16” high, though sizes vary.

If you’re not comfortable with electrical work or carpentry, it’s worth hiring a professional. Lowe’s offers installation services, and while it adds to the cost, it ensures the job is done safely and correctly. A poorly installed unit can lead to air leaks, water damage, or even electrical hazards.

Installation Tips and What to Expect

Installing a through the wall air conditioner isn’t as simple as plugging in a window unit—but with the right tools and preparation, it’s totally doable. Whether you’re a DIY enthusiast or hiring a pro, here’s what you need to know.

Pre-Installation Checklist

Before you start, gather your tools and double-check a few things:

• Wall Type: Make sure your exterior wall is suitable. Wood-frame walls are easiest; brick or concrete may require special tools.
• Electrical Setup: Confirm you have a dedicated 20-amp circuit. If not, you’ll need an electrician to install one.
• Wall Sleeve: Most units come with a sleeve, but verify the dimensions match your wall opening.
• Permits: Some cities require permits for through-the-wall installations—check local regulations.
• Weatherproofing: You’ll need flashing, caulk, and insulation to seal the unit and prevent leaks.

Step-by-Step Installation Overview

Here’s a simplified version of the process:

1. Mark and Cut the Opening: Use the sleeve as a template to mark the wall. Cut carefully with a reciprocating saw or hole saw.
2. Install the Sleeve: Slide the sleeve into the opening and secure it with screws. Make sure it’s level and flush with the wall.
3. Wire the Unit: Connect the AC to the dedicated circuit. This step should be done by a licensed electrician if you’re not experienced.
4. Mount the AC: Slide the unit into the sleeve and secure it according to the manufacturer’s instructions.
5. Seal and Insulate: Use weatherproof caulk around the exterior and foam insulation inside to prevent air leaks.
6. Test the Unit: Turn it on and check for proper cooling, airflow, and drainage.

While this sounds straightforward, mistakes can happen. One common error is not sealing the unit properly, which leads to drafts and higher energy bills. Another is installing the sleeve at the wrong angle—it should slope slightly outward to allow condensation to drain.

Professional Installation: Worth It?

If you’re not confident in your DIY skills, hiring a professional is a smart move. Lowe’s offers installation services starting around $200–$400, depending on the complexity. The pros have the tools, experience, and know-how to get it right the first time.

Plus, many manufacturers require professional installation to maintain the warranty. So even if you’re handy, it might be worth the extra cost for peace of mind and long-term reliability.

Maintenance and Troubleshooting Tips

A well-maintained through the wall air conditioner can last 10–15 years or more. But like any appliance, it needs regular care to run efficiently. Here’s how to keep yours in top shape.

Monthly Maintenance Tasks

• Clean the Filter: Remove and wash the filter every 30 days (or more often if you have pets or allergies). A dirty filter restricts airflow and makes the unit work harder.
• Check the Drain: Make sure the condensation drain isn’t clogged. A blocked drain can cause water to back up and damage the unit or your wall.
• Inspect the Exterior: Look for debris, dirt, or insect nests around the outdoor portion of the unit. Clean it gently with a hose.

Seasonal Maintenance

• Before Summer: Test the unit, clean the coils, and ensure the thermostat is working correctly.
• After Summer: Cover the outdoor portion with a weatherproof cover to protect it from snow and debris. This extends the life of the unit.

Common Problems and Fixes

• Unit Won’t Turn On: Check the circuit breaker and make sure the unit is plugged in. If it still doesn’t start, the thermostat or compressor may be faulty.
• Not Cooling Enough: Clean the filter and check for blocked vents. If the problem persists, the refrigerant may be low—call a technician.
• Water Leaking Inside: This usually means the drain is clogged or the unit isn’t level. Clear the drain and adjust the slope if needed.
• Strange Noises: Rattling could mean loose parts; grinding may indicate a failing motor. Turn off the unit and inspect or call for service.

Regular maintenance not only prevents breakdowns but also keeps your energy bills low. A clean, well-tuned AC uses less electricity and cools more effectively—so you stay comfortable without overspending.

Energy Efficiency and Cost Savings

One of the biggest advantages of modern through-the-wall air conditioners is their energy efficiency. With rising electricity costs, choosing a unit that saves energy isn’t just good for the planet—it’s good for your wallet.

Understanding EER and SEER Ratings

When shopping at Lowe’s, you’ll see two key ratings:

• EER (Energy Efficiency Ratio): Measures cooling output divided by power input at a specific temperature (usually 95°F). Higher EER = more efficient.
• SEER (Seasonal Energy Efficiency Ratio): Measures efficiency over an entire cooling season. More common in central AC systems, but some through-the-wall units list it.

Look for units with an EER of 10 or higher. ENERGY STAR-certified models typically have an EER of 12 or more. For example, the LG LW1016ER has an EER of 12.2, making it one of the most efficient options at Lowe’s.

How Much Can You Save?

Let’s say you run your AC for 8 hours a day during the summer (about 90 days). A 10,000 BTU unit with an EER of 10 uses about 1,000 watts per hour. At $0.15 per kWh, that’s about $1.20 per day, or $108 for the season.

Now, upgrade to a unit with an EER of 12.2 (like the LG model). It uses about 820 watts per hour, costing around $0.98 per day—or $88 for the season. That’s a savings of $20, just from a more efficient unit. Over 10 years, that’s $200 back in your pocket.

And that’s before factoring in programmable timers, eco modes, and smart features that reduce unnecessary runtime. The more you use these tools, the more you save.

Additional Money-Saving Tips

• Use a Programmable Thermostat: Set the AC to raise the temperature when you’re away and cool down before you return.
• Close Curtains During the Day: Blocking sunlight reduces heat gain, so your AC doesn’t have to work as hard.
• Seal Air Leaks: Use weatherstripping around doors and windows to keep cool air in.
• Upgrade Insulation: Better insulation means less heat transfer, reducing the load on your AC.

Combining an efficient through-the-wall unit with smart habits can cut your cooling costs by 20–30%. That’s money you can spend on something fun—like a vacation to a cooler climate!

Top Through the Wall Air Conditioners at Lowe’s

Model	BTU	Room Size	Key Features	Price Range
LG LW1016ER	10,000	Up to 450 sq. ft.	SmartThinQ, ENERGY STAR, 3 cooling speeds	$450–$500
Frigidaire FFTA0811W1	8,000	Up to 350 sq. ft.	Remote, washable filter, quiet operation	$350–$400
GE AHY12LZ	12,000	Up to 550 sq. ft.	Eco Mode, 4-way airflow, digital display	$500–$550
Haier HWF06AX1	6,000	Up to 250 sq. ft.	Budget-friendly, remote, compact	$250–$300

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

Choosing a through the wall air conditioner from Lowe’s is a smart move if you want a permanent, efficient, and space-saving cooling solution. Whether you’re tired of window units, need better insulation, or just want a quieter, more reliable way to beat the heat, these units deliver.

From the high-tech LG model with app control to the budget-friendly Haier, Lowe’s offers options for every need and budget. Just remember to pick the right size, consider key features, and don’t skip proper installation and maintenance. A little effort upfront can save you hundreds in energy bills and repair costs down the road.

So go ahead—take the plunge. Your future self will thank you when you’re lounging in a cool, quiet room while the world outside sizzles. Stay cool, stay comfortable, and enjoy the summer—without the sweat.

Frequently Asked Questions

What is a through the wall air conditioner, and how does it differ from a window unit?

A through the wall air conditioner is a permanent cooling solution installed directly into an exterior wall, offering better insulation and a sleeker look than window units. Unlike window ACs, it requires a wall sleeve and doesn’t block natural light or window access. Lowes offers several models designed for easy through-the-wall installation.

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

While DIY installation is possible for handy homeowners, hiring a professional is recommended to ensure proper sealing, electrical connections, and wall sleeve fit. Many through the wall air conditioner Lowes models include detailed guides, but improper installation can lead to energy loss or water leaks.

What size through the wall AC do I need for my room?

Measure your room’s square footage and match it to the AC’s BTU rating—typically 8,000-14,000 BTUs for 300-700 sq. ft. Lowes provides sizing charts online to help you choose the right through the wall air conditioner for efficient cooling without overworking the unit.

Are through the wall air conditioners energy efficient?

Yes, many modern through the wall ACs, including Energy Star-rated models at Lowes, feature high EER (Energy Efficiency Ratio) ratings and programmable thermostats. Look for units with inverter technology or eco-modes to reduce energy use and lower utility bills.

What are the best through the wall air conditioner brands available at Lowes?

Top-rated brands at Lowes include Frigidaire, GE, and Friedrich, known for reliability, quiet operation, and advanced features like Wi-Fi control. Check customer reviews and warranty terms to find the best fit for your needs.

Do through the wall ACs require maintenance?

Regular maintenance includes cleaning or replacing filters monthly, clearing debris from the exterior condenser, and checking the wall sleeve for air leaks. Most through the wall air conditioner Lowes models have washable filters and user-friendly access panels for easy upkeep.