LG LW2521ERSM Smart Window Air Conditioner with 24,500 BTU, 1560 sq. ft. Cooling Area, Wi-Fi Enabled, 208/230V

24,500 BTU Smart Wi-Fi Enabled Window Air Conditioner

The LG LW2521ERSM is a powerful 26-inch smart window air conditioner designed to efficiently cool spaces up to 1,560 square feet. With an impressive cooling capacity of 24,500 BTU, it ensures optimal comfort even during the hottest summer days. This unit is Wi-Fi enabled, allowing you to control the temperature and settings remotely through your smartphone or smart home devices, providing convenience and flexibility. The air conditioner operates on a 208/230V power supply, making it suitable for various home setups. Its sleek design not only enhances your room's aesthetics but also features multiple cooling and fan speeds, ensuring personalized comfort. Enjoy a cool and refreshing environment with the LG LW2521ERSM air conditioner.

• Maximum Cooling
• Made To Perfection
• Maximum Usability
• Quiet Operation
• Installation Made Easy
• Control Your Cool From Anywhere

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.

Why should you buy LG LW2521ERSM ?

• Powerful Cooling
  24,500 BTU capacity, great for very large rooms or spaces up to ~1,500–1,600 sq ft.
  
  
• Smart Control
  Built-in Wi-Fi, works with the LG ThinQ app, and supports voice assistants like Alexa and Google.
  
  
• Energy Saver Mode
  Reduces electricity use when full power isn’t needed.
  
  
• 4-Way Air Direction
  Spreads cool air evenly across the room.
  
  
• Auto Restart
  Restores your last settings automatically after a power outage.
  
  
• Convenient Timer
  24-hour programmable on/off scheduling.
  
  
• Multiple Modes
  Includes cool, fan, and dry (dehumidifier) modes.
  
  
• Strong Dehumidification
  Removes about 7–8 pints of moisture per hour, perfect for humid climates.
  
  
• High Airflow
  Around 530 CFM airflow helps cool spaces quickly and efficiently.
  
  
• Quiet & Sleep Options
  Quieter operation on low/sleep settings for night use.
  
  
• Easy Maintenance
  Washable slide-out filter with a filter reminder keeps performance high.
  
  
• Durable Build
  Slide-in/out chassis design for easier installation and servicing.

Frequently Asked Questions by Customers

• Which cooling power does the LW2521ERSM provide and what room size is it suited for?
  It provides about 24,500 BTU cooling capacity, enough for rooms up to about 1,550 sq ft.
  
  
• What voltage and electrical requirements does it need?
  It runs on 208/230 volts, uses a 15-amp plug, draws 11.8 to 10.9 amps when cooling, and consumes around 2,330-2,370 watts in cooling mode.
  
  
• What noise levels, airflow and dehumidification does it have?
  On High/Mid/Low it produces roughly 65/63/61 dB; dry air flow is about 530 CFM; dehumidification capability is about 7.7 pints per hour.
  
  
• What are its physical size, weight, and what window fit does it require?
  It is about 25.98″ wide, 17.68″ high, 28.11″ deep; net weight around 130 lbs, shipping weight around 146 lbs; fits window widths of 29-41″ and height of 19″.
  
  
• What special modes, controls and features are included?
  It includes WiFi control (ThinQ), remote control, 3 cooling speeds and 3 fan-only speeds, 4-way air deflection, top discharge, slide in-out chassis, energy saver mode, auto restart after power failure, a timer (24-hour on/off), filter alarm, thermistor control.
  
  
• What warranty period is offered?
  It comes with a one-year parts and labor warranty.

Pros

• Powerful cooling suited for very large rooms — big living areas, halls, or multiple connected rooms.
• Smart connectivity lets you control/monitor via phone or voice assistant.
• Good airflow and dehumidification rate, making it effective in humid climates.
• Multiple fan/cooling speeds and modes give flexibility (Sleep mode etc.) so you can scale down when full power is not needed.
• Washable filter & filter alarm reduce maintenance hassles.
• Using modern refrigerant (R-32) is better for environment.

Cons

• High voltage & power requirement — not usable on standard lower-voltage (110-120 V) without proper electrical setup.
• Noise at high speeds is loud (~65 dB), which can be bothersome in quieter or adjacent rooms.
• Physical size & weight are considerable (~130 lbs) — installation needs strong window framing and structural support.
• Running cost will be high if used extensively at full load; efficiency is decent but not premium (lower cost units or inverter models might be cheaper per hour).
• Large units like this tend to be overkill for smaller rooms — using it at partial load often, which may reduce efficiency.

Conclusion

The LG LW2521ERSM is a strong candidate if you have a large space (≈ 1,400-1,600 sq ft), correct electrical supply (208/230 V), and want smart features plus powerful cooling. It will deliver excellent cooling and comfort, especially in hot and humid climates, provided you can handle the power and installation.