Lowe’s through the wall air conditioners deliver powerful, energy-efficient cooling ideal for replacing outdated units or upgrading room comfort without sacrificing window space. Top models from trusted brands like Frigidaire and GE offer easy installation, precise temperature control, and quiet operation—perfect for bedrooms, sunrooms, or home offices. Find the best fit for your space and budget at Lowe’s, where performance meets reliability.

Key Takeaways

• Measure your wall opening to ensure a perfect fit before purchasing.
• Prioritize energy efficiency with ENERGY STAR models to save on bills.
• Choose the right BTU size based on room square footage for optimal cooling.
• Look for quiet operation under 60 dB for bedrooms or living areas.
• Verify electrical requirements to avoid costly rewiring or adapter issues.
• Opt for smart features like Wi-Fi or timers for convenient climate control.

Best Lowes Through the Wall Air Conditioners for Cool Comfort

It’s 95 degrees outside, the sun is blazing, and your living room feels more like a sauna than a sanctuary. You’ve tried fans, open windows, and even ice packs behind your neck—but nothing beats the crisp, refreshing chill of a properly installed air conditioner. If you’re tired of dragging window units in and out each season or dealing with the hassle of central AC installation, there’s a sleek, permanent solution that might just change your summer: through-the-wall air conditioners.

Lowe’s offers a wide selection of through-the-wall AC units designed to deliver reliable cooling without sacrificing style or space. These units are built to be installed directly into an exterior wall, providing a clean, built-in look while maximizing floor space—perfect for apartments, condos, or homes where window units just don’t cut it. Whether you’re cooling a bedroom, home office, or living area, a through-the-wall AC from Lowe’s can offer consistent comfort with minimal visual clutter.

In this guide, we’ll walk you through everything you need to know about choosing, installing, and maintaining the best through-the-wall air conditioners available at Lowe’s. We’ll cover top models, key features to look for, installation tips, energy efficiency, and real-world performance—so you can make an informed decision that keeps you cool all summer long.

Why Choose a Through-the-Wall Air Conditioner?

Before diving into specific models, it’s worth understanding why a through-the-wall AC might be the right fit for your home. Unlike window units that protrude awkwardly and block natural light, through-the-wall models are installed flush with the wall, offering a more polished, permanent appearance. They’re ideal for rooms where window installation isn’t practical—like rooms with narrow windows, security concerns, or rental restrictions.

Space-Saving Design

One of the biggest advantages of through-the-wall units is their space efficiency. Since they’re mounted directly into the wall, they don’t take up valuable floor space or interfere with furniture placement. This makes them perfect for small apartments, studios, or rooms with limited layout flexibility. You can place your bed, desk, or sofa right up against the wall without worrying about clearance for a bulky window unit.

Improved Aesthetics

Let’s be honest—window air conditioners aren’t exactly stylish. They stick out, collect dust, and can make your home look cluttered. Through-the-wall units, on the other hand, blend seamlessly into your wall. Many models come with front panels that match modern décor, and some even include decorative trim kits for a custom finish. If you care about how your home looks, this is a major win.

Better Insulation and Efficiency

Because through-the-wall units are sealed into the wall, they typically offer better insulation than window units. This means less air leakage, which translates to lower energy bills and more consistent indoor temperatures. A well-installed through-the-wall AC creates a tighter seal, reducing drafts and keeping cool air where it belongs—inside your home.

Quieter Operation

Many through-the-wall models are designed with noise reduction in mind. Since the compressor and fan are housed inside the wall cavity, the indoor unit tends to operate more quietly than window units, which often have noisy fans right next to your living space. If you’re sensitive to noise—especially while sleeping or working—this can make a big difference in your comfort.

Top Features to Look for in a Through-the-Wall AC

Not all through-the-wall air conditioners are created equal. When shopping at Lowe’s, it’s important to know what features matter most for your needs. Here are the key factors to consider before making a purchase.

Cooling Capacity (BTUs)

The first thing to check is the unit’s cooling capacity, measured in British Thermal Units (BTUs). This tells you how much heat the AC can remove from a room per hour. Choosing the right BTU rating is crucial—too low, and the unit will struggle to cool the space; too high, and it may cycle on and off too frequently, wasting energy and reducing humidity control.

As a general rule of thumb:

• 100–300 sq. ft.: 5,000–6,000 BTUs
• 300–450 sq. ft.: 7,000–8,000 BTUs
• 450–550 sq. ft.: 10,000–12,000 BTUs
• 550–700 sq. ft.: 14,000 BTUs

Keep in mind that factors like ceiling height, sun exposure, and insulation can affect cooling needs. If your room gets a lot of direct sunlight or has poor insulation, consider going one size up.

Energy Efficiency (EER Rating)

The Energy Efficiency Ratio (EER) measures how efficiently an AC uses electricity. It’s calculated by dividing the cooling output (in BTUs) by the power input (in watts). A higher EER means better efficiency and lower operating costs.

Look for units with an EER of 10 or higher. Many newer models from brands like LG, Frigidaire, and GE offer EER ratings between 10.5 and 12.5, making them excellent choices for energy-conscious buyers. Some even qualify for ENERGY STAR certification, which can make you eligible for utility rebates.

Installation Requirements

Through-the-wall units require a dedicated wall sleeve or opening. Most models come with a standard 26-inch wide sleeve, but it’s essential to measure your wall cavity before purchasing. You’ll also need to ensure the wall is structurally sound and can support the unit’s weight—typically 80 to 120 pounds.

Electrical requirements vary, but most units need a dedicated 115V or 230V circuit. If your home’s electrical system isn’t set up for this, you may need to hire an electrician. Lowe’s offers installation services, which can simplify the process—especially if you’re not comfortable with DIY projects.

Smart Features and Controls

Modern through-the-wall ACs often come with advanced controls that enhance convenience and efficiency. Look for features like:

• Remote control – Adjust temperature and settings from across the room
• Programmable timers – Set the AC to turn on or off at specific times
• Wi-Fi connectivity – Control the unit via smartphone app (available on select models)
• Sleep mode – Gradually adjusts temperature for comfort during the night
• Fan-only mode – Circulates air without cooling, great for mild days

Smart models allow you to monitor energy usage, receive maintenance alerts, and even integrate with home automation systems like Alexa or Google Home.

Noise Level (Decibels)

Noise is a common concern with air conditioners. Most through-the-wall units operate between 50 and 60 decibels (dB)—about the level of a quiet conversation or background music. If you’re a light sleeper or using the unit in a home office, look for models with lower dB ratings. Some premium units boast noise levels as low as 45 dB.

Top Through-the-Wall Air Conditioners at Lowe’s

Lowe’s carries a variety of through-the-wall air conditioners from trusted brands. Here are some of the best options currently available, based on performance, features, and customer reviews.

LG LW1216ER – Best Overall

The LG LW1216ER is a 12,000 BTU unit that strikes an excellent balance between power, efficiency, and smart features. It’s designed for rooms up to 550 square feet and boasts an impressive EER of 12.1, making it one of the most energy-efficient models in its class.

Key features include:

• Wi-Fi enabled with LG ThinQ app control
• Remote control and digital display
• 3 cooling speeds and 3 fan speeds
• Auto restart after power outage
• Washable filter for easy maintenance

Customers praise its quiet operation (52 dB) and reliable cooling performance. The sleek white front panel blends well with most interiors, and the included wall sleeve makes installation straightforward. At around $500, it’s a premium option—but worth the investment for long-term comfort and savings.

Frigidaire FFRH1222R1 – Best Budget Pick

If you’re looking for solid performance without breaking the bank, the Frigidaire FFRH1222R1 is a great choice. This 12,000 BTU unit is priced under $400 and delivers reliable cooling for medium to large rooms.

Highlights include:

• EER of 11.2
• Remote control with full-function display
• 8-way air direction control
• 24-hour timer
• Energy Saver mode

While it lacks Wi-Fi connectivity, it offers excellent value for the price. Installation is simple with the included sleeve, and the unit operates quietly at 54 dB. It’s a no-frills option that gets the job done efficiently.

GE AHY12LZ – Best for Smart Homes

The GE AHY12LZ is a 12,000 BTU smart air conditioner that integrates seamlessly with Alexa and Google Assistant. It’s perfect for tech-savvy homeowners who want voice control and app-based scheduling.

Features include:

• Wi-Fi and voice control
• Remote and mobile app access
• 4 cooling modes (Cool, Energy Saver, Fan, Dry)
• Auto-evaporative technology reduces maintenance
• Washable antimicrobial filter

With an EER of 11.5 and a noise level of 53 dB, it’s both efficient and quiet. The GE app allows you to set schedules, monitor energy use, and receive filter change reminders. At around $550, it’s a bit pricier, but the smart features justify the cost for many users.

Keystone KSTAT12-11C – Best for Small Spaces

For smaller rooms or supplemental cooling, the Keystone KSTAT12-11C offers 12,000 BTUs in a compact design. It’s ideal for bedrooms, home offices, or studio apartments.

Notable features:

• EER of 11.0
• Remote control with LED display
• 3 fan speeds and 2 cooling speeds
• Sleep mode and 24-hour timer
• Easy-clean filter

It’s one of the more affordable options at around $350, and customers appreciate its straightforward operation and reliable cooling. While it doesn’t have smart features, it’s a solid, no-nonsense unit for everyday use.

Installation Tips for Through-the-Wall ACs

Installing a through-the-wall air conditioner isn’t as simple as plugging in a window unit. It requires careful planning, the right tools, and attention to safety. Here’s what you need to know before you start.

Step 1: Choose the Right Location

Not every wall is suitable for a through-the-wall AC. Ideal locations are:

• Exterior walls (not interior)
• Away from direct sunlight if possible
• Near an electrical outlet or with access to a dedicated circuit
• At least 6–8 feet above the floor for optimal airflow

Avoid installing near heat sources like stoves, ovens, or radiators, as this can reduce efficiency.

Step 2: Prepare the Wall Opening

Most units come with a wall sleeve that fits a standard 26-inch width. You’ll need to cut a rectangular opening in the wall that matches the sleeve dimensions. Use a level to ensure the opening is straight, and slope the bottom slightly outward (about 1/4 inch per foot) to allow condensation to drain properly.

For wood-frame walls, use a reciprocating saw or circular saw. For concrete or brick, you may need a masonry drill and chisel—or hire a professional. Always check for electrical wires, plumbing, or structural supports before cutting.

Step 3: Install the Wall Sleeve

Slide the sleeve into the opening and secure it with screws. Seal around the edges with exterior-grade caulk to prevent air leaks and water intrusion. This step is critical for maintaining energy efficiency and protecting your home from moisture damage.

Step 4: Mount the AC Unit

Carefully slide the air conditioner into the sleeve. Most models have built-in brackets or side rails that lock into place. Secure the unit with the provided screws, and attach the front panel. Make sure the unit is level and tightly sealed.

Step 5: Electrical Connection

Plug the unit into a dedicated outlet. If your model requires hardwiring, turn off the power at the breaker and consult an electrician. Never attempt to modify electrical connections unless you’re qualified.

Step 6: Test and Maintain

Turn on the AC and check for proper operation. Listen for unusual noises, and ensure cool air is flowing evenly. Replace or clean the filter every 1–2 months during peak usage to maintain efficiency and air quality.

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 uses less power can save you hundreds of dollars over its lifetime.

Understanding Energy Use

A 12,000 BTU unit typically uses between 1,000 and 1,400 watts per hour. At an average electricity rate of $0.13 per kWh, running the unit for 8 hours a day could cost between $30 and $45 per month during peak summer months.

However, units with higher EER ratings use less power for the same cooling output. For example, a unit with an EER of 12 uses about 1,000 watts, while one with an EER of 10 uses 1,200 watts. Over time, that difference adds up.

Tips to Maximize Efficiency

• Set the thermostat to 78°F – This is the recommended temperature for energy savings and comfort.
• Use a programmable timer – Cool the room before you arrive home instead of running the AC all day.
• Keep the filter clean – A dirty filter restricts airflow and forces the unit to work harder.
• Seal gaps around the unit – Use weatherstripping or caulk to prevent air leaks.
• Use fans to circulate air – Ceiling or floor fans can make the room feel cooler, allowing you to raise the thermostat.

Investing in an ENERGY STAR-certified model can also qualify you for rebates from your utility company or local government.

Maintenance and Troubleshooting

Like any appliance, through-the-wall air conditioners require regular maintenance to perform at their best. Neglecting upkeep can lead to reduced efficiency, poor air quality, and costly repairs.

Routine Maintenance Checklist

• Clean the filter monthly – Remove the front panel and wash the filter with mild soap and water. Let it dry completely before reinstalling.
• Inspect the exterior vent – Make sure nothing is blocking airflow outside, such as leaves or debris.
• Check for leaks – Look for water pooling around the unit or dripping from the wall. This could indicate a clogged drain or improper installation.
• Clean the coils annually – Dust and dirt on the evaporator and condenser coils reduce efficiency. Use a soft brush or vacuum to clean them.
• Schedule professional service – Every 2–3 years, have a technician inspect the refrigerant levels, electrical connections, and overall performance.

Common Issues and Fixes

• Unit not cooling – Check the thermostat setting, filter, and power supply. Ensure the unit isn’t in fan-only mode.
• Water leaking inside – The drain may be clogged or the unit may not be level. Clear the drain and adjust the tilt if needed.
• Strange noises – Rattling could mean loose parts; grinding may indicate a failing motor. Turn off the unit and contact a technician.
• Remote not working – Replace the batteries or check for obstructions between the remote and unit.

Keeping up with maintenance not only extends the life of your AC but also ensures consistent comfort and lower energy bills.

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

Through-the-wall air conditioners from Lowe’s offer a permanent, efficient, and aesthetically pleasing solution for home cooling. Whether you’re outfitting a new apartment, upgrading an old window unit, or seeking a quieter, more powerful option, these models deliver reliable performance with modern conveniences.

From the smart-enabled LG and GE units to the budget-friendly Frigidaire and Keystone models, there’s a through-the-wall AC for nearly every need and budget. Just remember to choose the right size, prioritize energy efficiency, and plan for proper installation and maintenance.

While the upfront cost and installation effort may be higher than a window unit, the long-term benefits—better efficiency, quieter operation, and a cleaner look—make through-the-wall ACs a smart investment for cool, comfortable living. So beat the heat this summer with a unit that’s built to last, and enjoy the peace of mind that comes with reliable, year-after-year cooling.

Frequently Asked Questions

What are the best Lowe’s through the wall air conditioners for energy efficiency?

Top-rated options like the Frigidaire FHPC102AB1 and GE AJCQ10DCF at Lowe’s offer high CEER ratings (10+), Energy Star certification, and eco-friendly R-32 refrigerant. These models balance powerful cooling with lower energy consumption, reducing utility bills over time.

Can I install a through-the-wall AC unit myself, or do I need a professional?

While handy homeowners can install through-the-wall ACs using manufacturer instructions, professional installation is recommended for proper wall sleeve fitting, electrical wiring, and weatherproofing. Many Lowe’s units include installation kits, but local building codes may require licensed electricians for hardwired models.

What size through-the-wall air conditioner do I need for my room?

Match BTU capacity to room size: 8,000-10,000 BTUs for 300-450 sq ft, 12,000-14,000 BTUs for 550-700 sq ft. Lowe’s sizing charts and in-store specialists can help select the right Lowe’s through the wall air conditioner for your space, considering sun exposure and ceiling height.

Do these units require special maintenance compared to window ACs?

Through-the-wall units need similar maintenance (monthly filter cleaning, annual coil inspection) but require more effort to access due to permanent installation. Lowe’s models often feature removable chassis for easier servicing. Ensure proper drainage to prevent water damage behind the wall sleeve.

What’s the difference between 115V and 230V through-the-wall air conditioners?

115V units (like 10,000 BTU models) plug into standard outlets, while 230V units (15,000+ BTU) require dedicated circuits. Check your home’s electrical setup before purchasing – Lowe’s 230V through the wall air conditioners need professional hardwiring but provide stronger cooling for large spaces.

Can through-the-wall AC units be used for heating too?

Some Lowe’s models like the Friedrich Kuhl+ offer reverse-cycle heat pumps for year-round use. These dual-function units provide 10,000-14,000 BTUs of both cooling and heating, making them ideal for moderate climates where supplemental heating is needed.