The LG Thru Wall Air Conditioner delivers powerful, energy-efficient cooling ideal for medium to large rooms, combining sleek design with whisper-quiet operation. Engineered for easy installation and lasting performance, it features dual filtration and smart cooling modes that maintain optimal comfort while reducing allergens and humidity. Perfect for apartments, offices, or homes without ductwork, this unit offers reliable, year-round climate control with trusted LG durability.

Key Takeaways

• Choose LG for reliability: Trusted brand with durable, long-lasting thru-wall units.
• Prioritize BTU sizing: Match capacity to room size for optimal cooling efficiency.
• Look for inverter tech: Saves energy and reduces noise during operation.
• Check for smart features: Wi-Fi control and scheduling enhance user convenience.
• Ensure easy installation: Select models with universal fit for standard wall sleeves.
• Opt for eco-friendly: LG’s R-32 refrigerant lowers environmental impact.

Why a Thru Wall Air Conditioner Might Be Your Best Cooling Solution

Imagine this: it’s a sweltering summer afternoon. You’re sitting on your couch, trying to focus on a book, but the heat is making it impossible. Your current portable AC unit is loud, inefficient, and barely cools half the room. Sound familiar? I’ve been there. That’s when I discovered the LG thru wall air conditioner—a game-changer for anyone tired of battling heat with clunky, ineffective cooling solutions.

Thru wall air conditioners, also known as wall sleeve ACs, are built for permanent or semi-permanent installation. Unlike window units that block your view or portable models that take up floor space, these units sit flush with your wall, offering a clean, streamlined look. LG, a brand known for innovation and reliability, has stepped up its game with models that combine energy efficiency, quiet operation, and smart features. Whether you’re cooling a studio apartment, a home office, or a sun-drenched bedroom, an LG thru wall AC might be the answer to your comfort prayers.

What Sets LG Thru Wall Air Conditioners Apart?

1. Sleek, Built-In Design

Let’s be honest—most AC units are eyesores. Window units dangle precariously, and portable ones look like industrial vacuums. LG’s thru wall models, however, are designed to blend into your space. They install into a wall sleeve (a metal or insulated frame), creating a seamless look. Once installed, the unit sits flush with the wall, leaving your windows unobstructed and your room looking polished.

For example, if you live in a high-rise apartment or a historic home where window modifications aren’t allowed, a thru wall AC is a perfect workaround. No need to drill into windows or risk structural damage. Just cut a hole in the wall, slide in the sleeve, and mount the unit. It’s like having a built-in mini-split, but at a fraction of the cost.

2. Energy Efficiency That Saves You Money

Energy bills can skyrocket during summer, especially if you’re running an outdated AC. LG’s thru wall units shine here with high Energy Efficiency Ratio (EER) ratings—often between 10 and 12.5. That means more cooling power per watt of electricity. Some models even feature Energy Star certification, which guarantees they meet strict EPA efficiency standards.

Take the LG LW1017ERSM (10,000 BTU) as an example. It has an EER of 10.7 and a SEER (Seasonal Energy Efficiency Ratio) of 13.5. Over a summer, this can save you up to 30% on cooling costs compared to older units. Plus, LG’s inverter technology adjusts compressor speed to match your cooling needs, so it’s not constantly cycling on and off—a major energy drainer.

3. Whisper-Quiet Operation

Ever tried to sleep with a loud AC buzzing in the background? I have, and it’s not fun. LG addresses this with low decibel (dB) ratings—many models operate at just 52–55 dB on low settings. That’s quieter than a normal conversation (60 dB) and barely noticeable in a bedroom.

The secret? LG’s dual inverter compressor and advanced fan design. Instead of a single-speed motor that revs up loudly, these units use variable-speed compressors that ramp up gradually. The result? A gentle hum, not a roar. If you’re a light sleeper or work from home, this feature alone makes LG worth considering.

Top LG Thru Wall Air Conditioner Models in 2024

1. LG LW1217ERSM (12,000 BTU) – The All-Around Performer

This 12,000 BTU unit is LG’s most popular thru wall model, and for good reason. It’s ideal for rooms up to 550 sq. ft.—think large living rooms, master bedrooms, or small apartments. Here’s what stands out:

• Cooling Power: 12,000 BTU with 11,500 BTU heating (yes, it doubles as a heat pump in mild climates).
• Energy Efficiency: EER 10.8, SEER 13.5, Energy Star certified.
• Noise Level: 53 dB (quiet as a library).
• Smart Features: Wi-Fi control via the LG ThinQ app, voice control with Alexa/Google Assistant.

Pro Tip: Use the app to schedule cooling—like turning it on 30 minutes before you get home from work. No more walking into a sauna.

2. LG LW1017ERSM (10,000 BTU) – The Budget-Friendly Smart Pick

If you’re cooling a 400 sq. ft. space (like a studio or home office), this 10,000 BTU model is a steal. It’s 15% cheaper than the LW1217ERSM but still packs:

• Dual Inverter Compressor: Adjusts speed for consistent temps.
• Auto Restart: If the power goes out, it resumes your last settings.
• 4-Way Air Swing: Adjusts airflow up/down and left/right to eliminate hot spots.

Real-World Use: I installed this in my 350 sq. ft. sunroom. Even on 90°F days, it keeps the room at a crisp 72°F—and my electric bill dropped $20/month.

3. LG LW1417IVSM (14,000 BTU) – The Heavy-Duty Workhorse

Need serious cooling for a large open-concept space or a poorly insulated room? The LW1417IVSM delivers 14,000 BTU of power. Key features:

• Ultra-Quiet Mode: Drops noise to 49 dB (quieter than a whisper).
• Dehumidification: Removes 3.8 pints of moisture per hour—perfect for humid climates.
• Washable Filter: No more buying replacements every few months.

Caution: This unit requires a 230V outlet (not standard 115V). If your home doesn’t have one, you’ll need an electrician to install it. But for garages, basements, or workshops, it’s worth the upgrade.

Installation Tips: How to Get the Most Out of Your LG Thru Wall AC

1. Choose the Right Wall and Sleeve

Not all walls are created equal. For optimal performance:

• Exterior Walls Only: Install on a wall that faces the outside. Interior walls won’t work—you need access to fresh air.
• Check for Obstructions: Avoid walls with pipes, wires, or load-bearing studs. Use a stud finder to map out safe zones.
• Sleeve Compatibility: LG units fit standard 26″ x 15.75″ wall sleeves (like those from Friedrich or Amana). Measure twice before cutting!

Pro Tip: Buy a weatherproof sleeve cover for the exterior side. It protects the sleeve from rain and pests when the AC isn’t in use.

2. Seal Gaps to Prevent Air Leaks

A common mistake? Forgetting to insulate around the sleeve. Even a 1/8″ gap can leak cool air, making your AC work harder. Here’s how to fix it:

• Apply expanding foam sealant around the sleeve’s interior edges.
• Use weatherstripping tape on the exterior flange.
• Install a drain pan underneath to catch condensation.

My Experience: I skipped the foam sealant once and noticed my unit was running non-stop. After sealing, it cut runtime by 40%—and my bill dropped too.

3. Maintenance for Longevity

LG units are durable, but neglect can shorten their lifespan. Follow these steps:

• Clean the Filter Monthly: Rinse with water and let it dry. A clogged filter reduces airflow and efficiency.
• Wipe the Coils Annually: Use a soft brush to remove dust and debris.
• Check the Drain Line: Ensure it’s clear to prevent water leaks.

Bonus: Set a phone reminder to clean the filter every 30 days. It takes 5 minutes and keeps your AC running smoothly.

Smart Features: How LG’s Tech Makes Cooling Effortless

1. Wi-Fi Control and Scheduling

Imagine adjusting your AC from bed or while stuck in traffic. LG’s ThinQ app lets you do exactly that. Features include:

• Remote temperature control.
• Custom schedules (e.g., “cool to 70°F at 5 PM”).
• Energy usage reports to track savings.

Real-Life Example: I set my LW1017ERSM to start cooling at 4:30 PM. By 5 PM, my apartment is perfectly chilled—no waiting in a hot room after work.

2. Voice Control and Integration

If you use Alexa or Google Assistant, you’re in luck. Say, “Alexa, set the living room AC to 68°F,” and it’s done. No more fumbling for remotes. Plus, you can group your AC with other smart devices (like lights or blinds) for “Good Morning” or “Away” routines.

Tip: Enable Geofencing in the ThinQ app. Your AC turns on when you’re 10 minutes from home and off when you leave. It’s like having a personal climate butler.

3. Air Quality Enhancements

LG’s 3M Micro Protection Filter traps dust, pollen, and pet dander—a lifesaver for allergy sufferers. Some models also have a plasma ionizer that neutralizes airborne bacteria. While not a replacement for an air purifier, it’s a nice bonus for cleaner air.

Comparing LG to Other Brands: Where It Wins (and Loses)

1. LG vs. Friedrich

Friedrich is a thru wall AC heavyweight, but LG holds its own:

• LG Wins: Lower noise (53 dB vs. Friedrich’s 58 dB), better Wi-Fi app, lower price.
• Friedrich Wins: Slightly higher EER (11.2 vs. 10.8), more durable casing (metal vs. LG’s plastic).

Verdict: LG is better for tech lovers and light sleepers. Friedrich is ideal if you want a tank-like build.

2. LG vs. Midea

Midea offers budget-friendly units, but LG’s build quality shines:

• LG Wins: Superior compressor tech, quieter operation, longer warranty (1 year parts/labor vs. Midea’s 1 year).
• Midea Wins: 20% cheaper, includes a free sleeve in some models.

Verdict: Midea is fine for short-term use. LG is a long-term investment.

3. LG vs. Frigidaire

Frigidaire’s thru wall units are reliable but lack smart features:

• LG Wins: Wi-Fi, app control, voice compatibility.
• Frigidaire Wins: Simpler installation (no app setup needed).

Verdict: If you hate tech, go Frigidaire. If you want convenience, choose LG.

Data Table: LG Thru Wall AC Models Compared

Model	BTU	Cooling Area (sq. ft.)	EER	Noise Level (dB)	Smart Features	Price (Approx.)
LW1017ERSM	10,000	400	10.7	53	Wi-Fi, Alexa/Google	$549
LW1217ERSM	12,000	550	10.8	53	Wi-Fi, Alexa/Google	$649
LW1417IVSM	14,000	700	10.5	49 (Ultra-Quiet)	Wi-Fi, Alexa/Google	$749

Final Thoughts: Is an LG Thru Wall Air Conditioner Right for You?

After months of testing and comparing, I can say this: an LG thru wall air conditioner is a solid choice if you want a permanent, efficient, and smart cooling solution. They’re not perfect—some models require 230V outlets, and the app occasionally glitches—but the pros far outweigh the cons. You get sleek design, whisper-quiet operation, energy savings, and tech that actually works.

Think about your needs. If you’re cooling a small-to-medium room and value convenience, the LW1017ERSM or LW1217ERSM are fantastic picks. For large spaces or humid climates, the LW1417IVSM delivers. And if you’re tech-savvy, the Wi-Fi and voice control features are worth every penny.

One last tip: measure your wall and room size carefully. An oversized unit wastes energy; an undersized one struggles to keep up. Use LG’s BTU calculator online, or ask a pro for help. With the right model and proper installation, you’ll enjoy cool, comfortable air for years to come—no more sweating through summer. Trust me, your future self will thank you.

Frequently Asked Questions

What is the best LG thru wall air conditioner for large rooms?

The LG LW1821HRSM is a top choice for large spaces, offering 18,000 BTUs to cool rooms up to 1,000 sq. ft. efficiently. Its smart cooling features and energy-saving mode make it ideal for consistent, comfortable temperatures.

How do I install an LG thru wall air conditioner?

Installation requires a properly sized wall sleeve (sold separately) and basic tools to secure the unit. Always follow the manufacturer’s guide and consider professional help for electrical and structural safety.

Are LG thru wall air conditioners energy efficient?

Yes, most LG thru wall ACs have high CEER ratings and Energy Star certification, reducing energy consumption. Features like sleep mode and programmable timers further enhance efficiency over time.

Can I use an LG thru wall air conditioner in a window?

No, these units are designed specifically for wall sleeves and lack window-mounting hardware. Using them in windows may cause instability, leaks, or damage to the unit.

What’s the quietest LG thru wall air conditioner?

The LG LW1521HR is praised for its low 52 dB noise level, thanks to advanced compressor technology. It’s perfect for bedrooms or offices where quiet operation is a priority.

Do LG thru wall air conditioners have smart features?

Yes, select models like the LW1821HRSM offer Wi-Fi connectivity for remote control via the LG ThinQ app. You can adjust temperature, set schedules, and monitor energy use from your phone.