LG LW1521ERSM1 Smart Window Air Conditioner with 14,000 BTU, 700 sq ft. Cooling Area, Wi-Fi Enabled, Auto Restart, 24-Hour Timer, Sleep Mode, 115V

The LG LW1521ERSM1 is a powerful 14,000 BTU window air conditioner designed to efficiently cool large rooms up to 800 square feet. With its 115V power supply, this unit combines robust performance with energy efficiency, making it an ideal choice for hot summer days. The smart Wi-Fi capability allows you to control the air conditioner remotely using your smartphone or tablet, providing convenience and flexibility. You can easily adjust settings, set schedules, and monitor energy usage from anywhere. Additionally, the unit features multiple cooling and fan speeds, ensuring personalized comfort. Its sleek design fits seamlessly into any window, while the easy installation process makes setup a breeze. Enjoy a cool and comfortable environment with the LG LW1521ERSM1 air conditioner.

• Quiet Operation
• Control Your Cool From Anywhere
• Maximum Cooling
• Modern Design Made To Perfection

3-in-1 Operation

Use cool mode for powerful cooling and dehumidifying on hot days. In fan mode, the fan circulates the air in the room. Dry mode is ideal for damp, rainy days.

Easy Access to The Included Filter

This air conditioner features a slide-out, washable filter that's easy to access and remove without tools.

Control with Included Remote

Easily control your cool with the included remote.

Why should you buy LG LW1521ERSM1 ?

• Strong cooling power (14,000 BTU)
  cools large rooms up to around 700 sq ft
  
  
• Smart/Wi-Fi connected
  can control via LG ThinQ app, and works with Alexa & Google Assistant
  
  
• 3-in-1 modes (Cool / Fan / Dry)
  handles hot weather, humidity, or just air circulation
  
  
• Multiple fan & cooling speeds
  gives flexibility in airflow and noise control
  
  
• 4-way air deflection
  directs airflow to different parts of the room for more even cooling
  
  
• Auto-restart
  resumes previous settings after power cuts
  
  
• 24-hour timer
  schedule when unit turns on/off for energy savings & convenience
  
  
• Washable slide-out filter + filter alarm
  easy to maintain, helps keep air clean
  
  
• Remote control included
  adjust settings without leaving your seat
  
  
• Energy saver function
  reduces power use when full cooling isn’t needed

Frequently Asked Questions by Customers

• What is the cooling power of the LG LW1521ERSM1 and what room size can it handle?
  This model delivers 14,000 BTU of cooling power and is suited for rooms up to about 700 square feet.
  
  
• What are its physical dimensions and weight?
  It is approximately 23.6 inches wide, 15 inches tall, and 22.2 inches deep. The unit weighs around 82 pounds.
  
  
• What electrical requirements does it have?
  It operates on 115 volts with a 15-amp plug. It uses a rotary compressor and employs R-32 refrigerant.
  
  
• What modes and fan speed settings are available?
  It supports three cooling speeds, three fan-only speeds, and has three operating modes: Cool, Fan, and Dry. It also has a 4-way air deflection to help distribute airflow in different directions.
  
  
• What features help with convenience and smart control?
  It includes Wi-Fi connectivity (ThinQ) for remote control, voice control support with Google Assistant and Alexa, a remote control is included, it has a 24-hour on/off timer, auto-restart after power loss, a filter alarm or check filter reminder, and a slide-out washable filter.
  
  
• How efficient and quiet is this air conditioner?
  It has a CEER rating of about 11.2. The noise levels are around 55 dB on high, 54 dB at mid, and 53 dB at low. Dry mode dehumidifies about 4.6 pints per hour and air flow is roughly 265 CFM.
  
  
• What warranty does it come with?
  It comes with a one-year limited warranty for parts and labor.

Pros

• Strong cooling capacity: With 14,000 BTU, it can cool large, open or relatively large rooms (~700 sq ft) comfortably.
• Smart remote control: Via app/voice assistant, you can adjust settings without being next to the unit. Great for convenience.
• Multiple modes & fan speeds: Flexibility to choose cooling, dehumidifying (“Dry”), or just air circulation, which helps adjust to varied weather or humidity.
• Good airflow management: 4-way deflection + auto swing helps spread cooled air more evenly, reducing hot spots.
• Decent noise profile: On low or medium settings, it is reasonably quiet for its size.
• Useful handy features: Slide-out washable filter, timer, auto-restart after power loss, filter alert — all help usability and maintenance.

Cons

• Not the absolute quietest: Even though low/medium are acceptable, at high cooling output the noise can be more noticeable. For those extremely sensitive to sound, this could be a drawback.
• Energy efficiency is moderate: CEER of ~11.2 is decent, but some inverter models or higher-end units may offer better performance per watt.
• Large size & weight: At ~82 lbs, plus larger dimensions, it requires a robust window frame/install; may need two people to install.
• Cost & power usage: Larger BTU means higher electricity draw when operating at high load; if used long hours, energy bills will reflect that.
• Fitment concerns: Needs a sufficiently wide and tall window opening. If your windows are small or oddly shaped, you may face fit issues.

Conclusion

The LG LW1521ERSM1 is a solid choice if you need a powerful and smart window AC unit for a large room or open floor plan. It offers good cooling capacity, smart home integration, and useful comfort features. If your room size, window opening, and power setup are compatible, it’s likely to deliver strong performance and good utility.