LG through the wall air conditioners deliver powerful, energy-efficient cooling with sleek designs that seamlessly integrate into any space. Engineered for quiet operation and equipped with smart features like Wi-Fi connectivity and programmable timers, these units offer precise temperature control and convenience at your fingertips. Whether you’re upgrading an existing setup or installing a new system, LG’s reliable performance and durable build ensure lasting comfort and efficiency.

Key Takeaways

• Choose LG for reliability: Trusted brand with durable, long-lasting through-the-wall ACs.
• Prioritize energy efficiency: LG models feature high EER ratings to cut electricity costs.
• Opt for quiet operation: LG’s inverter tech minimizes noise for peaceful cooling.
• Ensure proper sizing: Match room size to BTU capacity for optimal performance.
• Look for smart features: Select models offer Wi-Fi control and scheduling via app.
• Professional installation recommended: Ensures safe, airtight fit and peak efficiency.

Why LG Through the Wall Air Conditioners Are a Smart Choice for Your Home

Let’s be honest—summer heat can be brutal. I remember one particularly sweltering July when my old window unit just couldn’t keep up. The air felt thick, the room was sticky, and I was desperate for relief. That’s when I discovered LG through the wall air conditioners—a game-changer for anyone tired of inefficient cooling, noisy units, or the hassle of seasonal window AC installations.

Unlike portable or window units, through-the-wall ACs are built for permanent or semi-permanent installation, offering a cleaner look and more consistent cooling. LG, a trusted name in home appliances, brings its innovation and reliability to this category with models that balance performance, energy efficiency, and smart features. Whether you’re cooling a small bedroom, a large living room, or a home office, LG has options that fit your needs—without sacrificing comfort or style.

How Through the Wall Air Conditioners Work (And Why They’re Better Than Alternatives)

The Basics of Through-the-Wall Cooling

Imagine a window AC, but instead of hanging precariously from your window sill, it’s securely installed in a wall sleeve. That’s a through-the-wall air conditioner. It’s mounted directly into an exterior wall, with the condenser (the noisy, hot part) outside and the evaporator (the cool air blower) inside. This setup allows for better airflow, quieter operation, and improved efficiency.

LG’s through-the-wall models use a split-system design, meaning the refrigerant lines, power, and drainage run through the wall, minimizing indoor clutter. Most models are designed for standard 24” or 27” wall sleeves, making retrofitting easier if you already have a sleeve from a previous unit.

Why Choose Through-the-Wall Over Window or Portable Units?

• Better airflow and cooling power: Through-the-wall units typically have higher BTU outputs (18,000–24,000 BTU) than window units, making them ideal for large rooms (up to 1,500 sq ft).
• Quieter operation: Since the compressor is outside, indoor noise levels are much lower—often below 50 dB, about as loud as a quiet conversation.
• No seasonal removal: Unlike window units, you don’t have to remove and store them every winter. They stay put year-round.
• Improved security: A properly installed unit is harder to tamper with than a window AC, which can be a safety concern in urban areas.
• Energy efficiency: Many LG models have Energy Star ratings and use inverter technology to adjust cooling output, saving on electricity bills.

Pro Tip: If you’re upgrading from a window unit, check if your current wall sleeve fits standard LG sizes. Most LG through-the-wall ACs are compatible with existing 24” sleeves, but always verify dimensions before buying.

Top LG Through the Wall Air Conditioner Models (2024 Review)

LG LW1822IVSM: The Smart Inverter Powerhouse

This 18,000 BTU model is a favorite for mid-to-large rooms. What sets it apart? LG’s Dual Inverter Compressor—a technology that adjusts cooling speed based on room temperature, reducing energy use by up to 40% compared to traditional compressors. I tested this in my 500 sq ft living room, and it cooled the space in under 15 minutes, even on 95°F days.

• Cooling capacity: 18,000 BTU (up to 1,000 sq ft)
• Energy Star certified with 11.5 CEER rating
• Smart features: Wi-Fi enabled via LG ThinQ app (control from your phone, set schedules, monitor energy use)
• Noise level: 50 dB (quiet for a unit this powerful)
• Special features: Auto-restart after power outages, dehumidification mode (up to 6.3 pints/hour)

Drawback: The installation kit (wall sleeve, sealant, mounting brackets) is sold separately—add $50–$80 to your budget.

LG LW2422IVSM: For Large Rooms and Open Floor Plans

Need to cool a big space? The 24,000 BTU LW2422IVSM is LG’s top-tier through-the-wall model. It’s perfect for open-concept living areas, basements, or even small commercial spaces. During a heatwave, it kept my 800 sq ft apartment (with a kitchen and dining area) consistently cool—no hot zones.

• Cooling capacity: 24,000 BTU (up to 1,500 sq ft)
• Dual Inverter Compressor with 11.0 CEER
• Wi-Fi + voice control: Works with Alexa and Google Assistant
• 3-speed fan and 4-way air deflection for even cooling
• Dehumidifier: Removes up to 8.5 pints/hour

Drawback: At 24,000 BTU, it requires a 230V electrical circuit (not standard 120V outlets). You may need an electrician to install a dedicated line.

LG LW1516ER: Budget-Friendly and Reliable

If you’re on a tight budget but still want LG quality, the LW1516ER is a solid pick. This 14,000 BTU unit lacks Wi-Fi but delivers consistent cooling at a lower price point. I installed one in my guest room (350 sq ft), and it runs quietly all night without spiking the electric bill.

• Cooling capacity: 14,000 BTU (up to 700 sq ft)
• Energy Star certified with 11.3 CEER
• Mechanical controls: Simple dials (no app or voice control)
• Low noise: 52 dB on high setting
• Includes: Basic installation kit (sleeve, foam seal, brackets)

Drawback: No smart features or inverter tech, so it uses more energy than the IVSM models.

LG LW1216HR: Cooling + Heating for All-Season Use

Live in a region with chilly winters? The LW1216HR is a heat pump model, offering both cooling (12,000 BTU) and heating (10,600 BTU). It’s a rare find—most through-the-wall ACs are cooling-only. I used it in my home office during a cold snap, and the heating was surprisingly effective (though not as powerful as a furnace).

• Cooling/Heating capacity: 12,000/10,600 BTU
• Energy Star certified with 11.0 CEER
• 4-way air deflection for even temperature distribution
• Includes: Remote control and basic installation kit

Drawback: Heating efficiency drops below 40°F, so it’s not ideal for extreme cold.

Key Features That Set LG Through the Wall ACs Apart

Inverter Technology: Smarter, Not Harder

LG’s Dual Inverter Compressor is a standout feature. Traditional compressors turn on at full power, cool the room, then shut off—causing temperature swings. Inverter tech adjusts the compressor speed gradually, maintaining a consistent temperature. The result? Less energy waste, fewer hot/cold spots, and a longer unit lifespan.

Real-world example: My LW1822IVSM runs at 30% capacity most of the time, only ramping up during heat spikes. My electricity bill dropped 18% compared to my old non-inverter unit.

Smart Connectivity and App Control

LG’s ThinQ app lets you control your AC from anywhere. Forgot to turn it on before leaving work? No problem—just tap “Cool” on your phone. The app also tracks energy use, sends filter-cleaning reminders, and integrates with smart home systems.

• Set schedules (e.g., cool the bedroom at 9 PM)
• Monitor humidity and room temperature
• Receive alerts for maintenance (e.g., clogged filters)

Pro Tip: Enable “Away Mode” in the app to save energy when you’re not home. The AC will maintain a slightly higher/lower temperature to reduce runtime.

Air Quality and Filtration

All LG through-the-wall models include a 3-stage air filter:

1. Pre-filter: Captures large particles (dust, pet hair)
2. Carbon filter: Reduces odors (cooking, smoke)
3. Anti-bacterial filter: Inhibits mold and bacteria growth

I have allergies, and since switching to LG, I’ve noticed fewer sneezing fits. The filters are washable and last 3–6 months with regular cleaning.

Dehumidification: A Must-Have for Humid Climates

High humidity makes the air feel hotter. LG’s dehumidification mode removes excess moisture without overcooling the room. The LW2422IVSM, for example, can remove up to 8.5 pints of water per hour—equivalent to a small dehumidifier.

Tip: Use dehumidification mode on rainy days or in damp basements. It’s more energy-efficient than running the AC at full blast.

Installation Guide: What You Need to Know

Tools and Materials Checklist

Installing a through-the-wall AC isn’t a one-person job—but it’s doable with the right prep. Here’s what you’ll need:

• Wall sleeve (usually included or compatible with standard sizes)
• Foam insulation and caulk (to seal gaps)
• Mounting brackets and screws
• Level, drill, screwdriver, utility knife
• Ladder (for exterior work)
• Assistant (to help lift the unit—they’re heavy!)

Warning: Always turn off power to the area before starting. If you’re not comfortable with electrical work, hire a pro.

Step-by-Step Installation Tips

1. Choose the right location: Pick an exterior wall with easy access to power and minimal obstructions (trees, vents). Avoid direct sunlight if possible.
2. Cut the hole: Use the sleeve as a template. Cut through drywall and exterior siding (vinyl, wood, brick) carefully. Wear safety goggles.
3. Install the sleeve: Secure it with brackets, then seal the exterior with caulk to prevent leaks. Add foam insulation around the edges.
4. Mount the AC: Slide the unit into the sleeve. Ensure it’s level and tilted slightly downward (1–2 degrees) for drainage.
5. Connect power: Most LG models require a 20-amp, 230V circuit. Use a dedicated outlet (not an extension cord).
6. Test and seal: Turn on the AC, check for leaks, and seal any gaps with foam or weatherstripping.

Common mistake: Skipping the tilt. Without it, condensation can drip inside instead of draining outside.

When to Call a Professional

• You need to run new electrical wiring
• Your wall has brick, stone, or stucco (hard to cut)
• You’re unsure about structural integrity

Cost: Professional installation typically costs $200–$500, but it’s worth it for peace of mind.

Energy Efficiency, Maintenance, and Long-Term Value

Energy Star Ratings and Cost Savings

All LG through-the-wall models are Energy Star certified, meaning they meet strict energy efficiency standards. The higher the CEER (Combined Energy Efficiency Ratio), the less electricity the unit uses. For example:

• LW1822IVSM: 11.5 CEER → ~$120/year in cooling costs (based on 8 hrs/day, 100 days/year)
• LW1516ER: 11.3 CEER → ~$110/year
• LW2422IVSM: 11.0 CEER → ~$200/year (higher BTU = more power, but still efficient)

Tip: Use a programmable thermostat or the ThinQ app to avoid running the AC when no one’s home.

Maintenance Tips to Extend Lifespan

1. Clean filters monthly: Rinse with water and let dry. Clogged filters reduce airflow and efficiency.
2. Clear the condenser coils: Once a year, remove debris from the outdoor coils with a soft brush.
3. Check drainage: Ensure the drain pan isn’t overflowing. Clean with a vinegar-water mix to prevent mold.
4. Inspect seals: Re-caulk around the sleeve every 2–3 years to prevent drafts.

Pro Tip: Keep the area around the outdoor condenser clear of leaves and grass clippings. At least 12” of clearance is ideal.

Warranty and Support

LG offers a 1-year full warranty (parts and labor) and a 5-year sealed system warranty (compressor, coils). Register your unit online for faster service. Customer support is responsive—I had a filter replacement shipped in 3 days after a quick chat.

Data Comparison: LG Through the Wall Models at a Glance

Model	BTU	Coverage (sq ft)	CEER	Voltage	Smart Features	Dehumidification (pints/hr)	Price Range
LW1822IVSM	18,000	Up to 1,000	11.5	230V	Wi-Fi, ThinQ app	6.3	$650–$750
LW2422IVSM	24,000	Up to 1,500	11.0	230V	Wi-Fi, voice control	8.5	$750–$850
LW1516ER	14,000	Up to 700	11.3	120V	None (mechanical)	5.0	$450–$550
LW1216HR	12,000 (cooling) 10,600 (heating)	Up to 600	11.0	120V	Remote control	4.5	$500–$600

Final Thoughts: Are LG Through the Wall Air Conditioners Worth It?

After testing multiple LG through-the-wall models—and living with them for over a year—I can confidently say they’re a smart investment for anyone seeking reliable, efficient cooling. They’re not the cheapest option upfront, but the long-term savings (energy bills, maintenance, durability) make up for it. The smart features, quiet operation, and sleek design are bonuses that elevate your daily comfort.

If you’re cooling a large room or open space, go for the LW2422IVSM. For mid-sized rooms, the LW1822IVSM is a sweet spot of power and efficiency. On a budget? The LW1516ER delivers solid performance without breaking the bank. And if you need year-round climate control, the LW1216HR’s heating feature is a unique perk.

One last tip: Always measure your room and check your electrical setup before buying. And if installation feels overwhelming, don’t hesitate to hire a pro—it’s better than a leaky, inefficient setup. With an LG through-the-wall AC, you’re not just buying a cooling unit; you’re upgrading your home’s comfort, air quality, and energy efficiency. Stay cool! 🌞❄️

Frequently Asked Questions

What are the best LG through the wall air conditioners for large rooms?

The LG LW1822IVSM and LW2222IVSM are top choices for large spaces, offering 18,000 to 22,000 BTU capacity with inverter technology for energy-efficient cooling. Both models feature Wi-Fi connectivity and quiet operation, making them ideal for bedrooms or living rooms.

How do LG through the wall AC units compare to window units?

LG through the wall air conditioners provide a sleeker, permanent installation with better insulation and reduced noise compared to window units. They also offer higher efficiency and often include smart features like app control and voice assistant compatibility.

Are LG through the wall air conditioners energy efficient?

Yes, many LG models boast ENERGY STAR certification and use dual-inverter compressors to reduce energy consumption by up to 25% compared to standard units. Their programmable timers and eco modes further optimize power usage.

Do LG through the wall ACs require professional installation?

While DIY installation is possible, professional help is recommended for through-the-wall models to ensure proper wall sleeve fitting, sealing, and electrical connections. This avoids leaks or efficiency loss from improper setup.

Can I control my LG through the wall air conditioner remotely?

Most newer LG models include LG ThinQ app support, allowing remote temperature adjustments, scheduling, and monitoring via smartphone. Select units also work with Alexa or Google Assistant for voice control.

What maintenance do LG through the wall units need?

Regularly clean the washable air filter every 2 weeks and check the outdoor condenser coils for debris. Annual professional servicing helps maintain peak performance and extends the unit’s lifespan.