LG LW1424RD 14,000 BTU Window AC Review: Big Cooling on 115V
A 14,000 BTU window air conditioner that runs on a standard 115V outlet, with a remote, 24-hour timer, 4-way air deflection and Auto Restart. Built for large living rooms and open spaces.
By Daniel Brooks
Updated October 8, 2026
The LG LW1424RD 14,000 BTU Window Air Conditioner is a high-capacity unit for large rooms that still runs on a standard 115V outlet. LG markets it for medium to large spaces, and it is one of the bigger conventional window air conditioners you can plug in without a higher-voltage circuit.
It covers the essentials with electronic controls, a remote, a 24-hour timer, 4-way air deflection and Auto Restart. The main questions are how much room it really covers and whether you can handle an 82 pound install. We evaluated it based on the manufacturer’s specifications.
Our Verdict
This LG is a straightforward high-capacity choice for a living room, open-plan space or large bedroom. Its strongest points are 14,000 BTU of cooling on a 115V plug, 3 cooling and fan speeds with Auto Cool, a 24-hour on/off timer, 4-way air deflection, a slide-out washable filter with Check Filter alert, and Auto Restart.
The trade-offs are weight, noise and some unclear coverage claims. At 82 pounds, installation is a serious two-person job, the listed noise level is 59 dB, and there is no inverter. The listing’s coverage figures also vary, so size it carefully. It holds 3.8 stars from 194 ratings. If you need strong cooling for a large room without rewiring, it is worth considering.
LG LW1424RD 14,000 BTU Window Air Conditioner
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Key Specifications
| Feature | Specification |
|---|---|
| Brand | LG |
| Model | LW1424RD |
| Type | Window air conditioner |
| Cooling Capacity | 14,000 BTU |
| Room Size (listed) | Up to 800 sq. ft. (title says 700 sq. ft.) |
| Efficiency | 11.2 (listed as SEER) |
| Noise Level | 59 dB |
| Voltage / Power | 115V, 1250W |
| Dimensions | 22.2″D x 23.63″W x 15″H |
| Weight | 82 pounds |
| Fan Speeds | 3 cooling and fan speeds, Auto Cool |
| Airflow | 4-way air deflection |
| Controls | Electronic controls, remote, 24-hour on/off timer, Auto Restart |
| Filter | Slide-out washable filter with Check Filter alert |
| Compressor | No inverter |
| Refrigerant | R-32 |
| Warranty | 1 year limited |
Cooling Capacity and Room Size
LG’s listing gives two coverage figures. The product title says 700 square feet, while the feature list and specifications say up to 800 square feet, describing an ideal room of 20′ x 40′. That inconsistency is a reason to size this unit carefully rather than assume the higher number.
For most homes, a 14,000 BTU unit is best matched to large living rooms, open kitchens and dining areas, or a large primary suite. A room with lots of glass, high ceilings or heavy sun will reduce the space it can comfortably cool.
The 4-way air deflection helps here. In a long or L-shaped room, being able to aim airflow toward the far end rather than straight ahead makes a bigger difference than in a compact bedroom.
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 its listed 14,000 BTU, it lines up with rooms of about 550 to 700 square feet on the chart, so the 700 square foot figure is the more conservative guide. The 800 square foot claim goes beyond what the chart suggests for this capacity.
Installation and Fit
The unit measures 22.2 inches deep, 23.63 inches wide and 15 inches tall, and weighs 82 pounds. An easy window installation kit with window curtain panels is included, along with the remote and batteries.
The listing does not give a clear window opening range, so check the installation manual before ordering. Because of the weight, plan on at least two people and follow the manual for any support bracket or extra hardware. A unit this heavy must be fully secured before you let go. It plugs into a standard 115V outlet, but at 1250 watts it is worth checking the manual for any dedicated circuit recommendation.
Noise, Energy Use and Efficiency
LG lists a noise level of 59 dB. That is typical for a large fixed-speed unit and works well in a living room with normal background sound, but it may be noticeable in a quiet bedroom at night.
The listing gives an efficiency figure of 11.2, labeled as SEER, and a power draw of 1250 watts. The compressor has no inverter, so it cycles fully on and off. The 24-hour timer is the main tool for limiting energy use, letting you schedule the unit around when the room is actually occupied.
Controls and Smart Features
Electronic controls on the unit and the included remote handle temperature, mode and fan speed. You get 3 cooling and fan speeds plus Auto Cool, which adjusts the fan to hold the set temperature.
The 24-hour digital on/off timer lets you build a cooling schedule, and 4-way air deflection directs airflow up, down, left or right, which matters in a large room. Auto Restart turns the unit back on after a power outage. There is no Wi-Fi or app control.
Maintenance and Drainage
The slide-out washable filter makes cleaning simple, and a Check Filter alert reminds you when it is due. In a large unit that runs for long hours, keeping the filter clean has a noticeable effect on airflow and efficiency.
LG notes the unit can be used for cooling, dehumidifying or circulating air. The listing does not explain condensate drainage, so check the manual for how water is handled and for seasonal removal and storage steps.
Pros and Cons
| Pros | Cons |
|---|---|
| 14,000 BTU on a standard 115V outlet | Very heavy at 82 pounds |
| Remote and 24-hour on/off timer | Listed noise level of 59 dB |
| 4-way air deflection for large rooms | No inverter compressor |
| Check Filter alert and slide-out filter | Coverage claims differ (700 vs 800 sq. ft.) |
| Auto Restart after power outages | No Wi-Fi or app control |
Who Should Buy It
| Who Should Buy It? | Who Should Look Elsewhere? |
|---|---|
| Large living rooms and open spaces | Small or medium bedrooms |
| Homes without a higher-voltage outlet | Anyone installing alone |
| Buyers who want a remote and timer | Smart home users wanting app control |
| Rooms where airflow direction matters | Light sleepers in a quiet room |
| Buyers who want simple, proven controls | Casement or sliding window owners |
Final Verdict
The LG LW1424RD 14,000 BTU Window Air Conditioner delivers big-room cooling on a standard 115V plug with a remote, 24-hour timer, 4-way air deflection and Auto Restart. It suits a large living room or open space, especially if you size it closer to the 700 square foot figure. The compromises are an 82 pound weight, a listed 59 dB noise level and no inverter or smart controls. You can check the current price and details for the LG LW1424RD 14,000 BTU Window Air Conditioner, or compare other 14,000 BTU window air conditioners.
Frequently Asked Questions
What size room does the LG LW1424RD cool?
LG’s specifications say up to 800 square feet, while the product title says 700. The ENERGY STAR chart matches 14,000 BTU with rooms of about 550 to 700 square feet, so the lower figure is the safer guide.
Does it need a special outlet?
No. The listing gives a voltage of 115V. At 1250 watts, check the manual for amperage and any dedicated circuit recommendation.
How heavy is it?
It weighs 82 pounds and measures 22.2 inches deep. Plan on at least two people for installation.
Does it have a timer?
Yes. A 24-hour digital on/off timer lets you schedule when the unit turns on or off, and the remote can control it from across the room.
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.