LG LW2516ER 24,500 BTU Window AC Review: Maximum Window Cooling
A 24,500 BTU window air conditioner on 230/208V power for very large rooms, with a remote, 24-hour timer, 3 cooling and fan speeds, Auto Cool and 4-way air deflection.
By Daniel Brooks
Updated October 8, 2026
The LG LW2516ER 24,500 BTU Window Air Conditioner is a very high-capacity unit that runs on 230/208V power. LG markets it for large spaces, and it is among the most powerful conventional window air conditioners you can buy. It holds 4.0 stars from 555 ratings.
It keeps the controls straightforward: a digital panel, a remote, 3 cooling and fan speeds with Auto Cool, a 24-hour timer and 4-way air deflection. The main questions are your wiring, your window and how you will lift a 136 pound unit. We evaluated it based on the manufacturer’s specifications.
Our Verdict
This LG is built for spaces that smaller units cannot handle. Its strongest points are 24,500 BTU of cooling, 3 cooling and fan speeds with Auto Cool, a 24-hour on/off timer, 4-way air deflection, Auto Restart, a slide-out washable filter with a filter light reminder and an included installation kit.
The trade-offs are substantial. It weighs 136 pounds, needs a 230/208V outlet, has no inverter or smart controls, and the specification sheet lists 61 dB. LG’s own coverage figures also vary between listings. If you have the electrical supply and a large window, and need maximum cooling from one unit, it is worth considering.
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Key Specifications
| Feature | Specification |
|---|---|
| Brand | LG |
| Model | LW2516ER |
| Type | Window air conditioner |
| Cooling Capacity | 24,500 BTU |
| Room Size (listed) | Up to 1,560 sq. ft. (description says 1,300 sq. ft.) |
| Efficiency | 10.3 (listed as SEER) |
| Noise Level | 61 dB |
| Voltage / Power | 230/208V, 2370W |
| Dimensions | 26″D x 28.13″W x 17.7″H |
| Weight | 136 pounds |
| Fan Speeds | 3 cooling and fan speeds, Auto Cool |
| Airflow | 4-way air deflection |
| Controls | Digital control panel, remote, 24-hour on/off timer, Auto Restart |
| Filter | Slide-out washable filter with filter light reminder |
| Compressor | Rotary, no inverter |
| Refrigerant | R-32 |
| Warranty | 1 year parts and labor |
Cooling Capacity and Room Size
LG’s listing gives two coverage figures. The feature list says up to 1,560 square feet, describing a 39′ x 40′ space, while the product description says up to 1,300 square feet. That gap is a good reason to size conservatively.
A unit this large makes sense for a big open-plan floor, a large basement, a workshop or a commercial-style space with a suitable window. In an ordinary living room, it would be oversized: it would cool quickly and cycle off before removing much moisture, leaving the space cool but clammy.
ENERGY STAR publishes this general guide for sizing a room air conditioner by floor area:
| Room Size (sq ft) | Cooling Capacity (BTU/hr) |
|---|---|
| 100 to 150 | 5,000 |
| 150 to 250 | 6,000 |
| 250 to 300 | 7,000 |
| 300 to 350 | 8,000 |
| 350 to 400 | 9,000 |
| 400 to 450 | 10,000 |
| 450 to 550 | 12,000 |
| 550 to 700 | 14,000 |
| 700 to 1,000 | 18,000 |
Adjust for your room: reduce capacity by 10 percent for a heavily shaded room, increase it by 10 percent for a very sunny room, add 600 BTU for each regular occupant beyond two, and add 4,000 BTU if the unit cools a kitchen. Source: ENERGY STAR.
At 24,500 BTU, this unit is above the largest size on the chart, which tops out at 18,000 BTU for 700 to 1,000 square feet. Both of LG’s coverage figures go beyond the chart, so treat them as best-case numbers for open, well-insulated spaces.
Installation and Fit
The cabinet measures 26 inches deep, 28.13 inches wide and 17.7 inches tall, and weighs 136 pounds. A window installation kit is included. The listing does not give a reliable window opening range, so check the installation manual for the supported width and height before ordering; a unit this size needs a very large opening.
This is a job for at least two strong people, and a professional installer is strongly worth considering. Follow the manual for support brackets so the unit is fully supported from below. The outlet must be a 230/208V receptacle that matches the plug. Never use an adapter or extension cord, and have an electrician confirm the circuit if you are unsure.
Noise, Energy Use and Efficiency
The specification sheet lists 61 dB, which is typical for a unit of this capacity at higher settings. In a large open space with normal background noise, that is usually acceptable, but it is not a bedroom unit.
The listing gives an efficiency figure of 10.3, labeled as SEER, and a power draw of 2370 watts. The rotary compressor has no inverter. The 24-hour timer is the main tool for limiting running time, so the unit only works hard when the space is in use.
Controls and Smart Features
An easy-to-use digital control panel and the included remote handle all settings. You get 3 cooling and fan speeds, plus Auto Cool, which adjusts the fan to hold the set temperature.
The 24-hour on/off timer lets you create a cooling schedule, and 4-way air deflection directs airflow where it is needed most across a large area. Auto Restart turns the unit back on after a power failure. There is no Wi-Fi or app control.
Maintenance and Drainage
The slide-out washable filter captures dust and allergens, and a filter light reminder tells you when to clean it. In a unit that moves this much air, a clean filter makes a noticeable difference to airflow and efficiency.
LG notes the unit can cool, dehumidify or circulate air. The listing does not describe condensate drainage, so check the manual for how water is handled. Removing a 136 pound unit each season is a major job, so follow the manual’s guidance on seasonal care.
Pros and Cons
| Pros | Cons |
|---|---|
| 24,500 BTU for very large spaces | Requires a 230/208V outlet |
| Remote, 24-hour timer and Auto Restart | Very heavy at 136 pounds |
| 3 fan speeds with Auto Cool | Coverage figures vary in the listing |
| 4-way air deflection | Specification lists 61 dB |
| Filter light reminder | No inverter or smart controls |
Who Should Buy It
| Who Should Buy It? | Who Should Look Elsewhere? |
|---|---|
| Very large open floors or basements | Standard bedrooms or living rooms |
| Homes with a 230V circuit near the window | Homes with only standard outlets |
| Buyers who prefer simple remote control | Smart home users wanting app control |
| Workshops with large windows | Anyone without help for a 136 pound install |
| Buyers who want maximum window-unit capacity | Buyers set on an inverter compressor |
Final Verdict
The LG LW2516ER 24,500 BTU Window Air Conditioner delivers maximum window-unit cooling with a remote, 24-hour timer, Auto Cool, 4-way air deflection and Auto Restart. It suits very large open spaces with a 230/208V circuit and a large window. The compromises are a 136 pound weight, inconsistent coverage claims, a listed 61 dB and no smart controls or inverter. You can check the current price and details for the LG LW2516ER 24,500 BTU Window Air Conditioner, or compare other window air conditioners for wide windows.
Frequently Asked Questions
What size space does the LG LW2516ER cool?
LG’s feature list says up to 1,560 square feet, while its description says 1,300. At 24,500 BTU, it is above the ENERGY STAR chart’s largest size, so size it for a genuinely large open space.
Does it need a 230V outlet?
Yes. It runs on 230/208V and needs a matching receptacle. It will not work on a standard household outlet.
How heavy is it?
It weighs 136 pounds. Plan on at least two strong people or a professional installer.
Does it have Wi-Fi?
No. Control is through the digital panel and the included remote.
About the author
Daniel Brooks is a home cooling editor at WikiCooling, covering window, portable, through-the-wall and mini-split air conditioners, fans, and dehumidifiers. He researches cooling capacity, energy efficiency, noise levels, installation requirements, and buyer feedback to help homeowners choose the right unit for their room size, climate, and budget.