LG LW2416HR 23,000 BTU Window AC with Heat Review: Big Spaces
A 23,000 BTU 230/208V window air conditioner with supplemental heat for very large rooms, with a remote, 24-hour timer, 4-way air deflection, Auto Restart and a slide in-out chassis.
By Daniel Brooks
Updated October 8, 2026
The LG LW2416HR 23,000 BTU Window Air Conditioner with Supplemental Heat is a 230/208V unit built for very large spaces. LG pairs strong cooling with a supplemental heat option for chilly days, and the slide in-out chassis is designed to make installation more manageable. Among the largest conventional window air conditioners, it suits big open floors, offices and large living areas.
It needs a 230/208V circuit, a large window and serious lifting help. We evaluated it based on the manufacturer’s specifications.
Our Verdict
This LG is a heavy-duty heat and cool combo for big spaces. Its strongest points are 23,000 BTU of cooling, a supplemental heat option, electronic controls with a remote, 2 cooling, heating and fan speeds, a 24-hour timer, 4-way air deflection, Auto Restart and a slide in-out chassis.
The trade-offs are substantial. It weighs 145 pounds, needs a 230/208V outlet, has only 2 fan speeds, uses R-410A refrigerant and lists 64 dB. The listing does not state the heating capacity, and LG’s coverage figures vary between 1,400 and 1,440 square feet. It holds 3.8 stars from 69 ratings. If you need one unit to cool and warm a very large space, it is worth considering.
LG 23,000 BTU Window Air Conditioner
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Key Specifications
| Feature | Specification |
|---|---|
| Brand | LG |
| Model | LW2416HR |
| Type | Window air conditioner with supplemental heat |
| Cooling Capacity | 23,000 BTU |
| Heating | Supplemental heat (capacity not listed) |
| Room Size (listed) | Up to 1,440 sq. ft. (36′ x 40′) |
| Efficiency | 9.8 (listed as SEER) |
| Noise Level | 64 dB |
| Voltage / Power | 230/208V, 3770W |
| Window Fit | 29″ to 41″ wide, 18″ minimum height |
| Dimensions | 30.5″D x 30.5″W x 16.8″H |
| Weight | 145 pounds |
| Fan Speeds | 2 cooling, heating and fan speeds |
| Airflow | 4-way air deflection |
| Controls | Electronic controls, remote, 24-hour timer, Auto Restart |
| Chassis | Slide in-out |
| Filter | Washable mesh filter |
| Compressor | Rotary scroll, no inverter |
| Refrigerant | R-410A |
| Warranty | 1 year parts and labor |
Cooling Capacity and Room Size
LG’s feature list rates the LW2416HR for rooms up to 1,440 square feet, about 36′ x 40′, while its description says 1,400 square feet. Either way, this unit is meant for very large spaces: an open-plan floor, a large basement, a workshop or an office.
In a smaller room, it would be badly oversized, cooling quickly and cycling off before removing much humidity. Reserve it for spaces where smaller units genuinely cannot keep up.
The 4-way air deflection helps distribute air across a large floor. In a long space, aim airflow toward the far end so the area farthest from the window does not stay warm.
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 23,000 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. LG’s coverage claims go beyond the chart, so treat them as best-case figures for open, well-insulated spaces.
Installation and Fit
The listed window opening is 29 to 41 inches wide with a minimum height of 18 inches. An installation kit is included. The slide in-out chassis lets the working part of the unit slide out of its outer case, which can make handling more manageable; check the manual for how LG recommends using it and whether a wall installation is supported.
The cabinet measures 30.5 inches deep, 30.5 inches wide and 16.8 inches tall, and weighs 145 pounds. A professional installer is strongly recommended. Follow the manual for support brackets so the unit is fully supported. The outlet must be a 230/208V receptacle that matches the plug; never use an adapter or extension cord.
Noise, Energy Use and Efficiency
The listed noise level is 64 dB, which is loud and best suited to large spaces with normal background activity, not bedrooms.
The listing gives an efficiency figure of 9.8, labeled as SEER, and a power draw of 3770 watts, which likely includes the heater. There is no inverter. The 24-hour timer is the main tool for limiting running time.
Controls and Smart Features
Electronic controls and the included remote handle all settings. You get 2 cooling, heating and fan speeds, a 24-hour timer and 4-way air deflection to direct air across a large area.
Auto Restart powers the unit back on after a power failure. There is no Wi-Fi or app control. The supplemental heat is designed for cooler days, so keep your primary heating for winter.
Maintenance and Drainage
The washable mesh filter is easy to clean. Because this unit may run for both cooling and heating, check the filter regularly through the year.
The listing does not describe condensate drainage. Check the manual for how water is handled in both modes and for guidance on seasonal care, since removing a 145 pound unit is a major job.
Pros and Cons
| Pros | Cons |
|---|---|
| 23,000 BTU for very large spaces | Requires a 230/208V outlet |
| Supplemental heat for cooler days | Extremely heavy at 145 pounds |
| Remote, 24-hour timer and Auto Restart | Listed noise level of 64 dB |
| 4-way air deflection | Only 2 fan speeds |
| Slide in-out chassis | Heating capacity not listed |
Who Should Buy It
| Who Should Buy It? | Who Should Look Elsewhere? |
|---|---|
| Very large open floors and offices | Standard bedrooms or living rooms |
| Homes with a 230V circuit near the window | Homes with only standard outlets |
| Buyers wanting cooling plus mild-weather heat | Anyone needing a primary winter heater |
| Workshops and basements with large windows | Light sleepers |
| Buyers using a professional installer | Buyers who want a newer refrigerant |
Final Verdict
The LG LW2416HR 23,000 BTU Window Air Conditioner with Supplemental Heat provides very high cooling capacity plus supplemental heat for large open spaces, with a remote, 24-hour timer, 4-way air deflection and a slide in-out chassis. The compromises are a 145 pound weight, a 230/208V requirement, a listed 64 dB and only 2 fan speeds. You can check the current price and details for the LG LW2416HR 23,000 BTU Window Air Conditioner with Supplemental Heat.
Frequently Asked Questions
What size space does the LG LW2416HR cool?
LG’s feature list says up to 1,440 square feet, about 36′ x 40′, while its description says 1,400. It is above the ENERGY STAR chart’s largest size, so it suits only very large open spaces.
Does it heat?
Yes. It offers supplemental heat for cooler days. LG does not list the heating capacity.
What outlet does it need?
It runs on 230/208V and needs a matching receptacle.
How heavy is it?
It weighs 145 pounds. A professional installer is strongly recommended.
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.