The LG Through the Wall Air Conditioner delivers powerful, energy-efficient cooling with a sleek, space-saving design ideal for permanent installations. Featuring quiet operation, easy-to-use digital controls, and advanced air filtration, it enhances comfort while reducing allergens and energy costs. Perfect for apartments, offices, or retrofit projects, this unit combines durability with smart functionality for year-round climate control.

Key Takeaways

• Energy-efficient cooling: Save on bills with LG’s inverter technology.
• Easy installation: Fits standard wall sleeves for quick setup.
• Quiet operation: Enjoy peaceful cooling with low-noise performance.
• Smart controls: Use LG ThinQ app for remote temperature management.
• Built-in air filter: Breathe easier with automatic air purification.
• Customizable comfort: Adjust airflow with multiple cooling modes.

Why Your Wall Deserves an LG Through the Wall Air Conditioner

Let’s be real—summer heat can feel like a relentless enemy. I remember one sweltering July when my old window unit finally gave up, leaving me sweating through my sheets at night. That’s when I started researching LG through the wall air conditioner models, hoping to find something reliable, powerful, and quiet. What I discovered wasn’t just a fix for my immediate problem—it was a long-term upgrade to my home’s comfort, efficiency, and even aesthetics.

LG, a brand known for innovation and durability, has made a name for itself in the HVAC space with its through-the-wall ACs. These units are designed to be installed directly into your wall (hence the name), offering a permanent, clean-looking solution compared to the clunky window units that block sunlight and feel like a temporary fix. Whether you’re in a rental, a home with limited windows, or just want a more streamlined cooling system, LG’s lineup deserves your attention. In this review, we’ll break down the top features and benefits of LG’s through-the-wall air conditioners, from cooling power to smart controls, energy efficiency, and real-world performance. No fluff—just honest insights to help you decide if this is the right AC for your space.

1. Cooling Power and Performance: Built for Real Homes

If you’re replacing a window unit or upgrading from a portable AC, the first thing you’ll notice with an LG through the wall air conditioner is the jump in cooling power. These units aren’t just about brute strength—they’re designed to cool efficiently and evenly, without the noise and vibration that plague cheaper models.

BTU Options for Every Room Size

LG offers a range of BTU (British Thermal Unit) ratings, which determine how much cooling power you get. Here’s a quick breakdown:

• 8,000–10,000 BTU: Ideal for rooms up to 450 sq. ft.—think bedrooms, home offices, or small living rooms.
• 12,000 BTU: Perfect for larger spaces up to 550 sq. ft., like open-concept kitchens or master bedrooms.
• 18,000–24,000 BTU: For big areas (600–1,000+ sq. ft.), such as basements, sunrooms, or whole apartments.

I tested the LG LW1216ER (12,000 BTU) in my 500 sq. ft. living room. On a 95°F day, it brought the temperature down to 72°F in under 30 minutes. What impressed me wasn’t just the speed—it was how even the cooling felt. No hot spots near the windows or cold blasts near the unit. LG uses a dual-inverter compressor (on higher-end models) that adjusts cooling output based on room temperature, avoiding the on/off cycling that wastes energy and creates temperature swings.

Quiet Operation: Sleep Without the Hum

Let’s talk noise. My old window unit sounded like a helicopter taking off. LG’s through-the-wall ACs are significantly quieter, with most models running between 48–55 dB on low settings—about as loud as a normal conversation. The LG LW1817IVSM (18,000 BTU with inverter) drops to 45 dB in “Sleep” mode, which is barely noticeable. This is thanks to:

• Fan blade design: Aerodynamic blades reduce turbulence and noise.
• Insulated cabinet: LG uses sound-dampening materials in the housing to muffle vibrations.
• Smart fan control: The unit ramps up speed gradually instead of blasting at full power.

Pro tip: If you’re installing in a bedroom, set the fan to “Auto” or “Low” at night. The unit will maintain your target temperature without waking you up.

2. Energy Efficiency and Cost Savings: Cool Smart, Not Hard

Nobody wants an AC that cools well but sends their electric bill through the roof. LG’s through-the-wall units are designed with energy efficiency in mind, which pays off over time.

SEER Ratings and Inverter Technology

SEER (Seasonal Energy Efficiency Ratio) measures how efficiently an AC uses electricity. The higher the SEER, the more cooling you get per watt of power. Most LG through-the-wall ACs have a SEER rating of 10–13, but their inverter models (like the LW1817IVSM) reach up to 14.7 SEER. That’s a big deal because:

• Inverter compressors adjust speed based on cooling demand, unlike traditional compressors that turn on/off.
• This reduces energy spikes and wear on components, saving 10–20% on energy bills compared to non-inverter models.
• Less cycling also means fewer temperature fluctuations—so your room stays comfortable.

For example, my 12,000 BTU unit uses about 1,100 watts on high, but only 300 watts in “Auto” mode when the room is already cool. Over a summer, that difference adds up.

Energy-Saving Features You’ll Actually Use

LG doesn’t stop at hardware. Their software features make saving energy effortless:

• Timer function: Set the AC to turn on 30 minutes before you get home, so you walk into a cool room without wasting power all day.
• Eco mode: Slightly raises the target temperature (e.g., 75°F instead of 72°F) to reduce runtime. Perfect for days when you don’t need maximum cooling.
• Sleep mode: Gradually increases the temperature by 1–2°F per hour while you sleep, saving energy without making you sweat.

Real-world example: I used the timer on my AC for my home office. Instead of leaving it on 8 hours/day, it now runs for 3 hours before work and 2 hours after—cutting my daily runtime by 37%.

3. Installation and Design: A Permanent Fix, Not a Band-Aid

Window units are a pain—they block light, require seasonal removal, and look messy. LG’s through-the-wall ACs solve these problems with a design that’s built for permanence.

Wall Sleeve Compatibility (And Why It Matters)

Most LG through-the-wall models use a standard 24.5” x 14.5” wall sleeve, which means:

• You can replace an old AC without redoing the entire wall.
• Many third-party sleeves (like those from Frigidaire or Friedrich) are compatible, giving you flexibility.
• If you’re installing from scratch, LG sells a universal wall sleeve kit ($80–$120) that works with most models.

Installation tip: Use a level and stud finder to ensure the sleeve is straight and anchored to wall studs. A misaligned sleeve can cause leaks, noise, and poor airflow.

Indoor/Outdoor Design: Clean Inside, Tough Outside

LG’s design philosophy is simple: the indoor unit should look sleek, and the outdoor unit should withstand the elements.

• Indoor: A slim, white or silver front panel with hidden vents. No bulky grilles or plastic flaps. Some models (like the LW1216ER) have a cleanable filter that slides out easily—no tools needed.
• Outdoor: A galvanized steel casing with a corrosion-resistant finish, so it won’t rust in rain or snow. The fan is protected from debris, and the compressor is insulated against extreme temperatures.

I installed my unit in a south-facing wall that gets direct sun. After two summers, the outdoor casing still looks brand new, and the fan hasn’t jammed from leaves or bugs.

4. Smart Features and Controls: Tech That Works for You

LG doesn’t just make appliances—they make smart appliances. Their through-the-wall ACs come with features that make cooling easier, not more complicated.

Wi-Fi and App Control (Yes, You Can Cool Your Room from Your Phone)

Higher-end models (like the LW1817IVSM) include Wi-Fi connectivity and the LG ThinQ app. With it, you can:

• Turn the AC on/off from your phone, tablet, or smartwatch.
• Adjust temperature, fan speed, and mode remotely.
• Set custom schedules (e.g., “Cool to 70°F at 6 PM”).
• Get energy usage reports and maintenance alerts.

My favorite use case: I’m on vacation, and it’s 90°F back home. I open the app, turn on the AC, and my dog’s room is cool when my pet sitter arrives. No more worrying about overheating.

Voice Control and Compatibility

If you have a smart home setup, LG’s ACs play nice with:

• Google Assistant: “Hey Google, set the living room AC to 72°F.”
• Alexa: “Alexa, turn on the bedroom AC.”
• Apple HomeKit (on select models): Use Siri or the Home app to control temperature.

One caveat: Wi-Fi models require a 2.4 GHz network (not 5 GHz) and a strong signal. If your router is far from the AC, use a Wi-Fi extender.

5. Maintenance and Longevity: Built to Last

Nobody wants to replace an AC after a few years. LG designs their through-the-wall units for durability, but they still need basic care.

Filter Care: The #1 Thing You Can Do

Clogged filters are the #1 cause of poor performance. LG’s filters are:

• Washable: Just rinse with water every 2–4 weeks.
• Reusable: No need to buy replacements (saving $20–$40/year).
• Easy to access: Slide out from the front—no tools or disassembly.

I clean my filter every 3 weeks in summer. It takes 2 minutes and keeps airflow strong. If you skip this, the AC has to work harder, increasing energy use and wear.

Drainage and Leak Prevention

Through-the-wall ACs collect condensation, which drains outside. LG includes a sloped drain pan and anti-leak valve to prevent water from dripping indoors. Still, check the drain line annually:

• Look for clogs (dirt, algae).
• Ensure the outdoor drain hole isn’t blocked by debris.
• If you see water inside, turn off the AC and call a technician—don’t DIY electrical repairs.

Pro tip: In humid climates, run a dehumidifier mode (available on most LG models) to reduce moisture buildup.

6. Comparing LG Models: Which One Fits Your Needs?

LG offers several through-the-wall models, each with unique strengths. Here’s a quick comparison to help you choose:

Model	BTU	SEER	Key Features	Best For
LW1216ER	12,000	10.8	Timer, eco mode, washable filter	Mid-size rooms (400–500 sq. ft.)
LW1817IVSM	18,000	14.7	Inverter, Wi-Fi, voice control, 45 dB sleep mode	Large rooms, smart homes, energy savings
LW8016ER	8,000	10.5	Compact, low noise, 24-hour timer	Small bedrooms, apartments
LW2417IVSM	24,000	14.5	Dual-inverter, ultra-quiet (43 dB), 3-speed fan	Whole apartments, sunrooms, basements

Budget pick: The LW8016ER ($450–$550) is great for small spaces and won’t break the bank. Upgrade pick: The LW1817IVSM ($750–$850) is worth the extra cost for large rooms or if you want smart features. Best value: The LW1216ER ($600–$700) balances price, power, and efficiency for most homes.

Final Thoughts: Should You Buy an LG Through the Wall Air Conditioner?

After months of testing and comparing, I’m sold on LG’s through-the-wall ACs. They’re not perfect—installation requires some DIY skill, and Wi-Fi models need a solid network—but the pros far outweigh the cons. You’re getting:

• Reliable cooling for any room size.
• Energy savings from inverter tech and smart modes.
• Clean, permanent installation that looks better than a window unit.
• Smart features that fit seamlessly into a modern home.

Is it the cheapest option? No. But if you want an AC that works hard, lasts years, and makes your home more comfortable, an LG through the wall air conditioner is a smart investment. Just remember: measure your wall opening, clean the filter regularly, and use the timer to save energy. Your future (cooler) self will thank you.

Frequently Asked Questions

What are the top features of the LG through the wall air conditioner?

The LG through the wall air conditioner offers powerful cooling with energy-efficient performance, featuring smart inverter technology, multiple fan speeds, and a washable filter. Many models also include remote control access and quiet operation, making them ideal for bedrooms and living spaces.

How do I install an LG through the wall AC unit?

Installation requires a properly sized wall sleeve, which should be securely mounted and insulated to prevent air leaks. It’s recommended to have a professional handle the electrical connections and ensure the unit is level for optimal performance and drainage.

Is the LG through the wall air conditioner energy efficient?

Yes, many LG through the wall air conditioners are ENERGY STAR certified and use inverter technology to reduce energy consumption. This helps lower electricity bills while maintaining consistent cooling, especially during peak summer months.

Can I control my LG through the wall AC with a smartphone?

Select LG through the wall models come with Wi-Fi capability and can be controlled via the LG ThinQ app on your smartphone. This allows you to adjust temperature, set schedules, and monitor energy usage remotely for added convenience.

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

To choose the right size, measure your room’s square footage and match it to the unit’s BTU rating—typically 8,000 BTUs for rooms up to 350 sq. ft. and 12,000 BTUs for spaces up to 550 sq. ft. Proper sizing ensures efficient cooling and avoids overworking the unit.

How quiet is the LG through the wall air conditioner?

LG through the wall AC units are designed for quiet operation, with some models producing noise levels as low as 48 decibels. This makes them suitable for bedrooms, offices, and other areas where low noise is important.