LGLW8001CSY
Window AC
DOE certified cooling
8,000BTU/hDOE test
Window · CEER 17.6 · 640 W
Cools rooms up to 350 sq ft
DOE data as of 2026-11-03DOE record
Does it fit your room? ENERGY STAR sizing chart
LG LW8001CSY: certified to DOE at 8,000 BTU/h cooling, CEER 17.6, 640 W, window unit. DOE data as of 2026-11-03.
Every model number on this record
Filed with DOE under basic model LW8001CSY. A listing with any of these numbers is this unit.
| Model number | Filed by |
|---|---|
| LW8001CSY (DOE basic model) | LG |
How much does the LG LW8001CSY cost to run?
About 12¢ an hour of cooling, or $27.89 for 30 days at 8 hours a day (less once the compressor cycles off).
DOE's record lists 640 W of electrical input while cooling. Electricity at 18.16¢/kWh, the US residential average for August 2026 (EIA Electric Power Monthly, table 5.6.A). Each 1¢/kWh you pay above or below 18.16¢ moves the 8 hour figure by 5¢.
How does the LG LW8001CSY rank in its DOE class?
Its DOE class (window ACs, 8,000 to 13,999 BTU/h) has 105 models certified to DOE. Its CEER of 17.6 is 1st of the 105, and 10% above their median of 16. On cost, the same 8,000 BTU/h at their median CEER would cost about $30.68 for 30 days at 8 hours, $2.79 more than this one.
Window ACs for 350 sq ft (6 with a listing)Among 105 window ACs, 8,000 to 13,999 BTU/h
Cooling (BTU/h)8,000
At the class minimum, with 29 others.
8,00012,000 BTU/h
Efficiency (CEER)17.6
The highest in the class.
1617.6
Two to compare with
From models with a matched listing.
Within 1,000 BTU/h of its size, highest CEER
KISSAIR NCG-08HI/ 8,100 BTU/hX1E- W Up to 350 sq ft, window, heat pump, CEER 15.1.
Nearest bigger unit
TCL KC-29/ 10,000 BTU/hYXRDBp(E1/ 6)(080719) Up to 450 sq ft, window, CEER 16.
DOE record
Cooling
- Cooling capacity
- 8,000 BTU/h
- Efficiency (CEER)
- 17.6 Btu/Wh
- Power input
- 640 W
Build
- Mount
- Window
- Heat pump
- No
Record
- DOE basic model
- LW8001CSY
- DOE class
- (3) Without reverse cycle, with louvered sides, and 8,000 to 13,999 Btu/h
- Brands on the filings
- 1
- In DOE's list since
- 2026-11-02first snapshot we hold
Questions
- How big a room does it cool?
- About 350 sq ft. ENERGY STAR's sizing chart calls for 8,000 BTU/h in rooms up to 350 sq ft. A sunny room, a kitchen or a high ceiling needs more.
- How much does the LG LW8001CSY cost to run for 8 hours?
- About 93¢ for 8 hours of cooling: roughly 640 W at 18.16¢/kWh, the US residential average for August 2026 (EIA).