Walmart’s top through-the-wall air conditioners for 2024 deliver powerful, energy-efficient cooling with easy installation and smart features—perfect for rooms up to 550 sq. ft. From trusted brands like Frigidaire and Keystone, these units offer precise temperature control, quiet operation, and sleek designs that integrate seamlessly into any home or apartment, all at Walmart’s unbeatable value-driven prices.

Key Takeaways

• Choose the right size: Match BTU capacity to room size for optimal cooling and energy efficiency.
• Check wall sleeve compatibility: Ensure your existing sleeve fits or budget for a new installation.
• Prioritize energy efficiency: Look for ENERGY STAR models to reduce long-term electricity costs.
• Consider noise levels: Select units under 60 dB for quieter indoor comfort.
• Review smart features: Opt for Wi-Fi or remote controls for convenient temperature management.
• Compare warranties: Longer coverage periods offer better protection and peace of mind.

Why a Through-the-Wall Air Conditioner Might Be Your Summer Hero

It’s 95 degrees outside, your ceiling fan is spinning like it’s in a wind tunnel, and you’re still sweating through your t-shirt. If you’ve ever been stuck in this situation, you know that a standard window AC unit might not cut it—especially if you’re dealing with limited window space, apartment restrictions, or just want a cleaner, more permanent cooling solution. Enter the Walmart through the wall air conditioner—a game-changer for many homeowners and renters alike.

I’ve been there. Living in a second-floor apartment with narrow windows and no central AC, I tried every portable unit on the market. They were loud, inefficient, and left me with a monthly electric bill that made me cringe. Then I discovered through-the-wall air conditioners. These units are installed directly into a wall, offering better airflow, quieter operation, and a more streamlined look. And the best part? You can find some truly solid options at Walmart—yes, that Walmart—where budget-friendly pricing meets reliable performance.

What Is a Through-the-Wall Air Conditioner and How Does It Work?

Let’s start with the basics. A through-the-wall air conditioner is a self-contained cooling unit designed to be permanently or semi-permanently installed through an exterior wall. Unlike window units, which sit in a window frame and can be removed seasonally, through-the-wall models are built into the wall structure, often with a sleeve that holds the unit securely in place. This design allows for better insulation, reduced air leakage, and a more professional appearance.

How It Differs from Window and Portable Units

• Window ACs: Slide into a window opening, often obstructing views and natural light. They’re easy to install but can be drafty and less energy-efficient.
• Portable ACs: Roll around on wheels and vent through a window kit. They’re flexible but noisy, inefficient, and require constant emptying of condensation.
• Through-the-wall units: Installed flush with the wall, sealed tightly to prevent air loss. They’re more efficient, quieter, and ideal for long-term use in a single room.

I once had a portable unit that sounded like a jet engine and leaked water onto my rug every time I ran it. After switching to a through-the-wall model, I was amazed at how much quieter and more consistent the cooling was—no more puddles, no more ear-splitting hums.

Key Components of a Through-the-Wall AC

• Cooling Coil & Compressor: The heart of the system, responsible for removing heat from indoor air.
• Fan: Circulates cooled air into the room and expels hot air outside.
• Wall Sleeve: A metal or insulated frame that secures the unit and prevents drafts. Some models come with the sleeve; others require a separate purchase.
• Drain Pan & Condensation System: Collects and drains moisture, preventing leaks.
• Thermostat & Controls: Manual dials, digital displays, or Wi-Fi-enabled smart features.

One thing I learned the hard way: not all through-the-wall ACs come with a wall sleeve. If you’re installing one yourself (or hiring a handyman), make sure you check whether the model includes it or if you need to buy it separately. I once had to wait two extra days for a sleeve to arrive—lesson learned!

Top Walmart Through the Wall Air Conditioner Picks for 2024

Walmart has quietly become a go-to destination for HVAC solutions, offering a range of through-the-wall air conditioners from trusted brands like LG, Frigidaire, Keystone, and Arctic Air. After researching dozens of models, reading real customer reviews, and testing a few myself, here are my top picks for 2024—each chosen for performance, value, and ease of use.

1. LG 10,000 BTU Through-the-Wall AC (LW1017ERSM)

This unit is a standout for mid-sized rooms (up to 450 sq. ft.). It features:

• 10,000 BTU cooling capacity—perfect for bedrooms, home offices, or living rooms.
• Smart cooling with LG ThinQ app—control temperature, set schedules, and receive maintenance alerts from your phone.
• Energy Star certified—uses about 30% less energy than standard models.
• Quiet operation (54 dB)—you’ll barely notice it’s on.

I tested this in my home office (about 400 sq. ft.) and was impressed by how quickly it cooled the space. The app integration was a nice surprise—I could turn it on remotely before heading home, so the room was cool by the time I walked in. The only downside? It doesn’t include the wall sleeve, so you’ll need to budget for that separately (about $40–$60).

2. Frigidaire 12,000 BTU Through-the-Wall AC (FFTH1222U1)

If you need serious cooling power for larger rooms (up to 550 sq. ft.), this Frigidaire model is a beast. It’s ideal for open-concept spaces or homes with high ceilings.

• 12,000 BTU—great for living rooms, master bedrooms, or small apartments.
• Three cooling speeds and two fan-only modes—flexible for different comfort levels.
• Easy-to-clean filter—removable and washable, which helps maintain airflow and efficiency.
• Includes wall sleeve—a big plus for DIY installers.

My sister installed this in her 500 sq. ft. studio apartment and said it cooled the entire space evenly—no hot spots near the windows. The included sleeve made installation straightforward, though she did hire a handyman to cut through the drywall (about $100 in labor). At under $400, it’s a solid value.

3. Keystone 8,000 BTU Through-the-Wall AC (KSTAW08A)

Perfect for smaller rooms (up to 350 sq. ft.), this Keystone unit is a budget-friendly option without sacrificing reliability.

• 8,000 BTU—ideal for guest rooms, nurseries, or home gyms.
• Mechanical controls—simple dials for temperature and fan speed—great if you’re not into tech.
• Energy Saver mode—cycles the fan off when the compressor is off, saving energy.
• Low price point (~$250)—one of the most affordable options at Walmart.

I bought this for my guest room, which gets hot in the afternoon. It’s not fancy, but it gets the job done. The mechanical controls are a throwback, but they’re intuitive and reliable. Just don’t expect smart features or ultra-quiet operation—this one runs at around 58 dB, which is noticeable but not disruptive.

4. Arctic Air 14,000 BTU Through-the-Wall AC (AWT-14100)

For those with large rooms or homes in hot climates, this high-capacity unit delivers.

• 14,000 BTU—covers up to 700 sq. ft., great for open-plan homes or sunrooms.
• Dual cooling speeds and fan-only mode—flexible for varying conditions.
• Slide-out chassis—makes cleaning and maintenance much easier.
• No wall sleeve included—a downside, but the unit is still competitively priced at ~$450.

I haven’t personally tested this one, but a friend who lives in Arizona swears by it. His living room is 650 sq. ft., and he says it keeps the space cool even during 100+ degree days. The slide-out chassis is a smart design—cleaning the filter and coils is a breeze, which helps extend the unit’s lifespan.

How to Choose the Right Through-the-Wall AC for Your Home

With so many options, picking the right through-the-wall air conditioner can feel overwhelming. But it doesn’t have to be. Here’s how to narrow it down based on your needs.

Step 1: Measure Your Room Size

BTU (British Thermal Unit) ratings tell you how much cooling power a unit has. As a rule of thumb:

• 300–400 sq. ft. → 8,000–10,000 BTU
• 450–550 sq. ft. → 10,000–12,000 BTU
• 600+ sq. ft. → 14,000+ BTU

Don’t guess. Measure your room’s length and width, then multiply. If your room has high ceilings (over 8 ft), add 10–15% more BTU. Sun exposure? Add another 10%. I once bought a 10,000 BTU unit for a 450 sq. ft. room with a south-facing window. It struggled on sunny afternoons. A 12,000 BTU unit fixed that instantly.

Step 2: Consider Installation & Wall Type

Not all walls are created equal. You’ll need an exterior wall with access to the outside. Here’s what to think about:

• Drywall vs. brick/concrete: Drywall is easier to cut through. Brick or concrete requires special tools (like a masonry drill) and more time.
• Wall sleeve compatibility: Check the unit’s dimensions and make sure it fits standard sleeve sizes (usually 26” wide x 15.5” high x 16” deep).
• DIY vs. professional install: If you’re handy, you can do it yourself. But if you’re unsure about electrical wiring or cutting through structural walls, hire a pro. It’s worth the peace of mind.

I tried installing a unit in a brick wall once. It took me three hours, a sore arm, and a trip to the hardware store for a diamond-tipped drill bit. My advice? If you’re not confident, call a handyman. Most charge $100–$200 for a full install.

Step 3: Look at Energy Efficiency & Noise Levels

Two specs to check:

• EER (Energy Efficiency Ratio): Higher EER = more efficient. Look for units with EER of 10+ (Energy Star models often hit 11–12).
• Decibel (dB) rating: Lower = quieter. Under 55 dB is ideal for bedrooms. 55–60 dB is acceptable for living rooms.

The LG 10,000 BTU unit I tested has an EER of 11.2 and runs at 54 dB—perfect for a quiet night’s sleep. The Keystone model, while cheaper, has an EER of 9.8 and 58 dB. It works, but it’s not as efficient or quiet.

Installation Tips: DIY or Hire a Pro?

Installing a through-the-wall air conditioner isn’t as simple as sliding a window unit into place. It requires precision, safety awareness, and some basic tools. But with the right prep, it’s totally doable.

DIY Installation: What You’ll Need

• Measuring tape & level—to mark the cutout accurately.
• Jigsaw or reciprocating saw—for cutting through drywall or wood.
• Masonry drill & bits—if cutting through brick or concrete.
• Wall sleeve—if not included.
• Weatherproof caulk & insulation foam—to seal gaps.
• Electrical outlet—make sure the unit’s plug reaches a grounded outlet.

Here’s my step-by-step process:

1. Choose the location: Pick a spot near an electrical outlet, away from furniture, and with clear airflow.
2. Trace the sleeve template: Most units come with a paper template. Tape it to the wall and trace the outline.
3. Cut the hole: Start small and test-fit the sleeve. You can always cut more, but you can’t add back wall material.
4. Install the sleeve: Slide it in and secure with screws. Seal the edges with caulk.
5. Insert the AC unit: Slide it into the sleeve and plug it in.
6. Seal and insulate: Use foam sealant around the edges to prevent drafts.

I made the mistake of rushing the sealing step once. The result? A drafty hole that let in bugs and cold air in winter. Now I take my time—10 minutes of caulking can save you a lot of hassle later.

When to Hire a Professional

Consider hiring help if:

• You’re cutting through brick, concrete, or a load-bearing wall.
• You need to run a new electrical circuit (most through-the-wall units require 115V, but larger ones may need 230V).
• You’re unsure about building codes or permits (some cities require permits for permanent HVAC installations).

My neighbor, a retired electrician, offered to help me with my install. He spotted that my outlet was on a 15-amp circuit shared with the kitchen. “If you run the AC and a microwave at the same time, you’ll trip the breaker,” he said. He installed a dedicated 20-amp circuit—$150 well spent.

Maintaining Your Through-the-Wall AC for Long-Term Performance

A well-maintained air conditioner can last 10–15 years. But neglect it, and you’ll face higher energy bills, poor cooling, and costly repairs. Here’s how to keep your unit in top shape.

Monthly Maintenance: Simple but Essential

• Clean or replace the air filter: A clogged filter restricts airflow and forces the unit to work harder. Washable filters should be cleaned every 30–60 days. Replace disposable ones every 2–3 months.
• Check for debris: Clear leaves, dirt, or cobwebs from the outdoor side of the unit. This improves airflow and efficiency.
• Inspect the drain pan: Make sure it’s not cracked or clogged. A clogged drain can lead to leaks or mold.

I clean my filter every month. It takes 5 minutes, and I can feel the difference—the air flows better, and the unit doesn’t run as long to cool the room.

Seasonal Tasks: Before and After Summer

• Before summer: Run a test cycle. Listen for unusual noises. Check that the thermostat responds correctly.
• After summer: Cover the outdoor side with a plastic cover (available at Walmart) to protect it from snow, rain, and debris.
• Inspect seals: Re-caulk if the seal around the sleeve is cracked or peeling.

I once skipped the end-of-season cover. The next spring, the unit was caked in leaves and had a small leak. A $15 cover could’ve prevented that.

Troubleshooting Common Issues

• Unit won’t turn on: Check the power outlet and circuit breaker. Try plugging in another device.
• Not cooling well: Clean the filter, check for obstructions, and make sure the thermostat is set correctly.
• Water leaks: Empty the drain pan. If it keeps leaking, the drain line may be clogged.
• Loud noises: Could be a loose fan blade or debris in the fan. Turn off the unit and inspect.

When my LG unit started making a rattling noise, I opened the front panel and found a loose screw. A 30-second fix saved me a service call.

Data Comparison: Walmart Through-the-Wall ACs at a Glance

Model	BTU	Room Size	EER	Noise (dB)	Smart Features	Wall Sleeve Included	Price (Approx.)
LG LW1017ERSM	10,000	450 sq. ft.	11.2	54	Yes (ThinQ app)	No	$380
Frigidaire FFTH1222U1	12,000	550 sq. ft.	10.8	56	No	Yes	$390
Keystone KSTAW08A	8,000	350 sq. ft.	9.8	58	No	Yes	$250
Arctic Air AWT-14100	14,000	700 sq. ft.	10.5	57	No	No	$450

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

If you’re tired of noisy portable units, drafty window ACs, or sky-high electric bills, a Walmart through the wall air conditioner could be the upgrade you’ve been waiting for. These units offer better performance, quieter operation, and a cleaner look—all at prices that won’t break the bank.

From the smart features of the LG model to the budget-friendly Keystone unit, there’s something for every room and every wallet. Just remember: measure your space, consider your wall type, and don’t skip maintenance. A little effort upfront can save you years of discomfort and repair costs.

Personally, I’ll never go back to window units. My through-the-wall AC is quiet, efficient, and blends into the wall like it was always there. And when summer heat hits, I know I’m covered—no sweating, no stress, just cool, reliable comfort. If you’re ready to make the switch, head to Walmart. Your future cool self will thank you.

Frequently Asked Questions

What are the best Walmart through the wall air conditioner options for 2024?

The top picks for 2024 include models from trusted brands like LG, Frigidaire, and Keystone, available at Walmart. These units offer energy efficiency, quiet operation, and smart features like Wi-Fi controls and programmable timers.

How do I install a through the wall air conditioner from Walmart?

Most Walmart through the wall air conditioners require a wall sleeve (sold separately) and professional installation for proper sealing and electrical safety. Always check local building codes and the product manual for specific requirements before DIY installation.

Are through the wall AC units energy efficient compared to window units?

Yes, through the wall air conditioners are often more energy efficient than window units because they create a tighter seal and don’t block natural light. Look for Walmart models with ENERGY STAR certification and high CEER ratings for maximum savings.

Can I use a Walmart through the wall air conditioner year-round?

Many 2024 models sold at Walmart include heating functions (heat pumps or electric heat strips), making them suitable for year-round use. Check the product details to confirm if the unit has both cooling and heating capabilities.

What size through the wall air conditioner do I need?

Choose a unit based on room size: 8,000–10,000 BTUs for 350–550 sq ft, or 12,000–14,000 BTUs for larger spaces. Walmart’s product listings include room size recommendations to help you pick the right capacity.

Do Walmart through the wall AC units come with warranties?

Most units include a 1-year limited warranty on parts and labor, with some brands offering extended coverage on compressors. Always verify warranty terms on the Walmart product page before purchasing.