The LG 14,000 BTU Through the Wall Air Conditioner delivers powerful, energy-efficient cooling perfect for large rooms up to 700 sq. ft. With its quiet operation and easy-to-use digital controls, this unit combines performance and convenience, making it a top choice for year-round comfort and seamless wall integration.

Key Takeaways

• High cooling power: Efficiently cools large rooms up to 700 sq ft with 14,000 BTU.
• Through-the-wall design: Saves window space and offers permanent, stable installation.
• Energy-saving mode: Reduces power consumption without sacrificing comfort or performance.
• Easy-to-use controls: Digital thermostat and remote simplify temperature adjustments and scheduling.
• Quiet operation: Runs below 55 dB, ideal for bedrooms and quiet environments.
• Washable filter: Reusable air filter lowers maintenance costs and improves air quality.

Why I Chose the LG 14000 BTU Through the Wall Air Conditioner (And Why You Might Too)

Let’s be real: summer heat isn’t just uncomfortable—it’s exhausting. I remember one particularly brutal July when my old window unit died, and I spent three days sweating through meetings, tossing and turning at night, and basically just surviving. That’s when I decided: no more compromises. I needed a reliable, powerful, and efficient cooling solution, and after weeks of research, I landed on the LG 14000 BTU Through the Wall Air Conditioner. It wasn’t the cheapest option, but it promised something priceless: peace of mind.

What drew me in was the idea of a permanent, clean installation. No more wrestling with heavy window units, no more blocking natural light, and no more worrying about security. A through-the-wall unit seemed like the grown-up solution I’d been avoiding. But after living with the LG 14000 BTU model for over a year, I can confidently say it’s been a game-changer. Whether you’re cooling a large living room, a master bedroom, or even a small apartment, this unit delivers. In this review, I’ll walk you through what I’ve learned—what works, what doesn’t, and whether it’s worth the investment for your space.

Key Features and Specifications: What Makes This Unit Stand Out?

The LG 14000 BTU through the wall air conditioner isn’t just another cooling appliance—it’s a thoughtfully designed system packed with features that cater to real-world needs. Let’s break down what makes it tick.

Power and Cooling Capacity

At 14,000 BTUs, this unit is designed to cool spaces up to 700 square feet—ideal for large rooms, open-plan living areas, or even studio apartments. I use it in a 600-square-foot living room/kitchen combo, and it cools the entire space evenly, even during heatwaves. It’s powerful without being overkill, and I’ve found it handles humidity well, which is a big deal if you live in a muggy climate.

One thing I love: it doesn’t blast cold air in one spot and leave the rest of the room lukewarm. The airflow is well-distributed, thanks to the dual-fan system and wide-angle louvers. I’ve had units in the past that felt like they were “spot cooling,” but this one feels like it’s treating the whole room.

Energy Efficiency and EER Rating

Energy efficiency is a big concern for me—I hate seeing my electricity bill spike in the summer. The LG 14000 BTU model has an Energy Efficiency Ratio (EER) of 11.3, which is above average for through-the-wall units. That means it uses less power to deliver the same cooling effect compared to older or lower-rated models.

It’s also ENERGY STAR certified, which gives me confidence that it meets strict efficiency standards. I’ve noticed a 15-20% drop in my cooling costs compared to my old 12,000 BTU window unit, even though this one is more powerful. That’s a win for both my wallet and the planet.

Smart Features and Remote Control

This isn’t your grandma’s AC. The LG unit comes with a full-function remote control that lets you adjust temperature, fan speed, and mode from across the room. But the real standout is the Wi-Fi capability (available on select models). With the LG ThinQ app, I can turn the AC on or off, set schedules, and even monitor energy usage—all from my phone.

Here’s a practical example: I leave for work at 8 AM, but I want my apartment cool by the time I get home at 5:30 PM. I set a schedule in the app to kick on at 4:30 PM. No more coming home to a sauna. It’s a small luxury, but it makes a huge difference in daily comfort.

Noise Levels and Operation

One of my biggest fears was noise. I work from home, and a loud AC can be a nightmare. But the LG 14000 BTU is surprisingly quiet. On the lowest fan setting, it measures around 50-55 decibels—about as loud as a normal conversation. Even on high, it’s not disruptive. I’ve taken video calls with it running, and my coworkers never noticed.

It uses a variable-speed compressor, which means it doesn’t cycle on and off abruptly. Instead, it adjusts its output to match the room’s temperature, which reduces noise and saves energy. It’s a subtle but important detail.

Installation Process: What to Expect and How to Prepare

Installing a through-the-wall AC is a bigger job than a window unit, but it’s totally doable with the right prep. I’ll be honest: I was intimidated at first. But with a little research and some basic tools, it went smoothly. Here’s what you need to know.

Wall Sleeve Requirements

The first step is ensuring your wall has a through-the-wall sleeve (also called a chassis sleeve). This is a metal or plastic frame that fits into the wall opening and holds the AC unit. Most older homes and apartments already have one—check your building’s maintenance team if you’re unsure.

If there’s no sleeve, you’ll need to install one. This involves cutting a hole in the wall (typically 15.75” x 25.75” for this LG model), framing it, and sealing it properly. I hired a handyman for this part, and it took about 4 hours. Cost: around $300, including materials.

Pro tip: Always double-check the sleeve dimensions before buying the AC. The LG 14000 BTU fits standard 26” x 16” sleeves, but older buildings may have non-standard sizes. Measure twice, buy once.

Step-by-Step Installation Tips

• Turn off power to the area where you’re working. Safety first!
• Remove the old unit (if applicable). This can be heavy—use a dolly or get help.
• Clean the sleeve thoroughly. Remove dust, debris, and old weatherstripping.
• Slide the LG unit into the sleeve from the outside. Most units have a locking mechanism—listen for the “click” to confirm it’s secure.
• Seal gaps around the unit with foam tape or caulk to prevent air leaks.
• Connect the power using the included cord. Make sure it’s plugged into a dedicated 20-amp circuit—don’t use an extension cord.

I did this solo (with a friend helping to lift the unit), and it took about 2 hours. The hardest part was aligning the unit with the sleeve—it’s a tight fit, so patience is key. Once it’s in, the rest is plug-and-play.

Common Installation Pitfalls (And How to Avoid Them)

Here’s where things can go wrong—and how I learned from others’ mistakes:

• Incorrect sleeve size: Measure your existing sleeve or plan for a new one. Don’t assume it’s standard.
• Poor sealing: Gaps around the unit cause drafts and reduce efficiency. Use high-quality foam tape or silicone caulk.
• Wrong electrical setup: This unit requires a 20-amp circuit. If your outlet is 15-amp, you’ll need an electrician to upgrade it. Don’t risk tripping breakers.
• Ignoring building codes: In some areas, through-the-wall ACs require permits. Check local regulations before starting.

One thing I wish I’d known: some LG models come with a pre-assembled chassis that slides into the sleeve. Others require you to attach the unit to the chassis first. Check your model’s manual—it makes a big difference in ease of install.

Performance in Real-World Use: Cooling, Humidity, and Reliability

Specs are great, but how does the LG 14000 BTU actually perform in daily life? After a year of use, here’s the real talk.

Cooling Speed and Consistency

This unit cools fast. I tested it on a 95°F day: the room was 82°F when I turned it on. In 20 minutes, it dropped to 74°F. The 3-speed fan lets you fine-tune airflow—low for quiet nights, high for quick cooling. I usually use medium, which balances noise and performance.

The auto-restart feature is a lifesaver. After a power outage, it turns back on automatically and resumes your previous settings. No more waking up in a sweat at 3 AM because the power flickered.

Humidity Control and Air Quality

Humidity is a silent comfort killer. The LG unit has a dehumidification mode that removes moisture without overcooling the room. I use it on muggy days, and it makes a noticeable difference. My skin feels less sticky, and my electronics don’t get that “damp” smell.

It also has a plasma air purifying system (on higher-end models). It’s not a replacement for an air purifier, but it helps reduce dust, pollen, and odors. I’ve had fewer allergy flare-ups since installing it.

Reliability and Maintenance

Reliability is where LG shines. In 14 months, I’ve had zero breakdowns. The unit runs smoothly, and the compressor doesn’t make weird noises. LG’s reputation for durability is well-earned.

Maintenance is simple:

• Clean the filter monthly: Just pop it out, rinse with water, and let it dry. A clogged filter reduces efficiency by up to 15%.
• Check the outdoor coil: Remove leaves and debris from the back of the unit every few months.
• Inspect seals annually: Replace weatherstripping if it’s cracked or peeling.

I set a phone reminder to clean the filter every 30 days. It takes 5 minutes and keeps the AC running efficiently.

Pros and Cons: The Honest Breakdown

No product is perfect. Here’s my unfiltered take on the LG 14000 BTU, based on real use.

The Pros (Why I’d Buy It Again)

• Powerful, even cooling: No hot spots or cold drafts. It treats the whole room.
• Energy efficient: Lower bills than my old window unit, despite higher BTUs.
• Quiet operation: Perfect for bedrooms and home offices.
• Smart features: The app and remote control add serious convenience.
• Easy maintenance: The filter is accessible, and cleaning is straightforward.
• Durable build: Feels solid, not flimsy. LG’s 1-year warranty is a bonus.

The Cons (What Could Be Better)

• Installation cost: If you need a new sleeve or electrical work, it adds up. Budget $300-$500 extra.
• Wi-Fi only on select models: The base model doesn’t have smart features. You’ll pay $50-$100 more for Wi-Fi.
• Noisy on high fan: At max speed, it’s louder than I’d like for sleeping. Use medium or low at night.
• No heating mode: It’s cooling-only. If you want a heat pump, look elsewhere.
• Weight: At 90 lbs, it’s heavy. Get help lifting it into the sleeve.

Are these dealbreakers? For me, no. The pros far outweigh the cons. But if you’re on a tight budget or don’t need Wi-Fi, consider the base model to save money.

Who Should Buy the LG 14000 BTU Through the Wall AC (And Who Should Look Elsewhere)

This unit isn’t for everyone. Here’s who it’s best for—and who might want to explore other options.

Ideal Buyers: The Perfect Match

• Homeowners or renters with a wall sleeve: If your building already has a through-the-wall opening, this is a no-brainer.
• Large room or open-plan space: 700 sq ft is its sweet spot. Don’t use it for a tiny bedroom—it’ll overcool.
• Tech-savvy users: If you love smart home gadgets, the Wi-Fi model is worth the upgrade.
• Energy-conscious buyers: The EER rating and ENERGY STAR certification make it a green choice.
• People who hate window units: No more blocking windows, no more security risks.

Who Might Want to Consider Alternatives

• Budget buyers: If you’re under $500, look at Frigidaire or Midea through-the-wall units. They’re less efficient but more affordable.
• Small spaces: For rooms under 400 sq ft, a 10,000-12,000 BTU unit will suffice and save energy.
• Heating needs: If you want both cooling and heating, consider a ductless mini-split system.
• Renters without wall sleeves: You’ll need landlord approval and a sleeve installation. A portable AC might be easier.

For me, the LG 14000 BTU was the right choice because I wanted a permanent, efficient, and quiet solution for a large space. But if your needs are different, there are plenty of other great options.

Data Table: LG 14000 BTU Through the Wall AC Specifications

Feature	Specification
Cooling Capacity	14,000 BTU
Coverage Area	Up to 700 sq ft
Energy Efficiency Ratio (EER)	11.3
Energy Star Certified	Yes
Fan Speeds	3 (Low, Medium, High)
Noise Level (Low/High)	50-55 dB / 60-65 dB
Smart Features	Wi-Fi (select models), LG ThinQ app
Dehumidification Mode	Yes
Air Purification	Plasma system (select models)
Power Requirements	20-amp circuit, 230V
Dimensions (H x W x D)	14.7” x 24.7” x 20.1”
Weight	90 lbs
Warranty	1 year

Final Verdict: Is the LG 14000 BTU Through the Wall AC Worth It?

After a year of use, I can say with confidence: yes, it’s worth it. The LG 14000 BTU through the wall air conditioner delivers on its promises—powerful cooling, energy efficiency, quiet operation, and smart features. It’s transformed my living space from a summer oven to a comfortable retreat.

Is it perfect? No. The installation cost can be steep, and the Wi-Fi feature isn’t standard. But if you’re ready to invest in a permanent, high-performance cooling solution, this unit is a top contender. It’s not just an appliance—it’s a lifestyle upgrade.

For me, the peace of mind is priceless. No more sweating through work calls, no more restless nights, no more worrying about whether my old window unit will survive another summer. The LG 14000 BTU has been reliable, efficient, and surprisingly easy to live with.

If you’re in the market for a through-the-wall AC and your space fits the 700 sq ft target, I’d recommend this model without hesitation. Just remember to budget for installation if you need a sleeve or electrical work. And if smart features are a must, spring for the Wi-Fi model.

At the end of the day, comfort is personal. But if you’re like me—someone who values reliability, efficiency, and a little tech-savvy convenience—the LG 14000 BTU through the wall air conditioner is a smart, long-term choice. Summer heat doesn’t stand a chance.

Frequently Asked Questions

What is the cooling capacity of the LG 14000 BTU through the wall air conditioner?

The LG 14000 BTU through the wall air conditioner is designed to efficiently cool spaces up to 700 square feet, making it ideal for large bedrooms, living rooms, or small apartments. Its 14,000 BTU rating ensures powerful and consistent cooling even during peak summer months.

Is the LG 14000 BTU wall unit energy efficient?

Yes, this model features a high Energy Efficiency Ratio (EER) and comes with LG’s Smart Inverter technology, which reduces energy consumption by adjusting compressor speed. This helps lower electricity bills while maintaining optimal comfort.

Can the LG 14000 BTU through the wall AC be controlled remotely?

Yes, select models of the LG 14000 BTU through the wall air conditioner are compatible with the LG ThinQ app, allowing you to control temperature, fan speed, and schedules from your smartphone. This smart functionality adds convenience and helps improve energy management.

What size wall sleeve do I need for the LG 14000 BTU unit?

The LG 14000 BTU through the wall air conditioner typically requires a standard 26-inch wide wall sleeve. Be sure to check the exact model specifications, as dimensions may vary slightly, and consult a professional for proper installation.

Does the LG 14000 BTU air conditioner have a dehumidifier function?

Yes, this unit includes a built-in dehumidifier that helps remove excess moisture from the air, improving indoor comfort and air quality. It’s especially useful in humid climates or during rainy seasons.

How loud is the LG 14000 BTU through the wall air conditioner?

The LG 14000 BTU model operates quietly, with sound levels as low as 52 decibels on low fan settings, thanks to its Smart Inverter compressor and optimized airflow design. This makes it suitable for use in bedrooms or quiet living spaces.