LGLW1001CSY
Window AC
DOE certified cooling
10,000BTU/hDOE test
Window · CEER 16.8 · 880 W
Cools rooms up to 450 sq ft
DOE data as of 2026-11-03DOE record
Does it fit your room? ENERGY STAR sizing chart
LG LW1001CSY: certified to DOE at 10,000 BTU/h cooling, CEER 16.8, 880 W, window unit. DOE data as of 2026-11-03.
Every model number on this record
Filed with DOE under basic model LW1001CSY. A listing with any of these numbers is this unit.
| Model number | Filed by |
|---|---|
| LW1001CSY (DOE basic model) | LG |
How much does the LG LW1001CSY cost to run?
About 16¢ an hour of cooling, or $38.35 for 30 days at 8 hours a day (less once the compressor cycles off).
DOE's record lists 880 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 7¢.
How does the LG LW1001CSY 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 16.8 is 2nd of the 105, and 5% above their median of 16.
Window ACs for 450 sq ft (3 with a listing)Among 105 window ACs, 8,000 to 13,999 BTU/h
Cooling (BTU/h)10,000
Higher than 32 of 105. 32 others share 10,000.
8,00012,000 BTU/h
Efficiency (CEER)16.8
Higher than 103 of 105.
1617.6
Two to compare with
From models with a matched listing.
Within 1,000 BTU/h of its size, highest CEER
TCL KC-29/ 10,000 BTU/hYXRDBp(E1/ 6)(080719) Up to 450 sq ft, window, CEER 16.
Nearest bigger unit
TCL T12WV4S12,000 BTU/hUp to 550 sq ft, window, CEER 16.
DOE record
Cooling
- Cooling capacity
- 10,000 BTU/h
- Efficiency (CEER)
- 16.8 Btu/Wh
- Power input
- 880 W
Build
- Mount
- Window
- Heat pump
- No
Record
- DOE basic model
- LW1001CSY
- 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 450 sq ft. ENERGY STAR's sizing chart calls for 10,000 BTU/h in rooms up to 450 sq ft. A sunny room, a kitchen or a high ceiling needs more.
- How much does the LG LW1001CSY cost to run for 8 hours?
- About $1.28 for 8 hours of cooling: roughly 880 W at 18.16¢/kWh, the US residential average for August 2026 (EIA).