LGLW1427S

Window AC

DOE certified cooling

14,000BTU/hDOE test

Window · CEER 16.8 · 1,230 W

Cools rooms up to 700 sq ft

DOE data as of 2026-11-03DOE record

Does it fit your room? ENERGY STAR sizing chart

LG LW1427S: certified to DOE at 14,000 BTU/h cooling, CEER 16.8, 1,230 W, window unit. DOE data as of 2026-11-03.

Every model number on this record

Filed with DOE under basic model LW1427S. A listing with any of these numbers is this unit.

Every model number filed under basic model LW1427S, DOE data as of 2026-11-03
Model numberFiled by
LW1427S (DOE basic model)LG

How much does the LG LW1427S cost to run?

About 22¢ an hour of cooling, or $53.61 for 30 days at 8 hours a day (less once the compressor cycles off).

DOE's record lists 1,230 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 10¢.

How does the LG LW1427S rank in its DOE class?

Its DOE class (window ACs, 14,000 to 19,999 BTU/h) has 29 models certified to DOE. Its CEER of 16.8 is tied for 1st of the 29, and 5% above their median of 16.

Window ACs for 700 sq ft (1 with a listing)

Among 29 window ACs, 14,000 to 19,999 BTU/h

Cooling (BTU/h)14,000

At the class minimum, with 13 others.

14,00018,000 BTU/h

Efficiency (CEER)16.8

At the class maximum, with 1 other.

1616.8

Two to compare with

From models with a matched listing.

  • Within 1,000 BTU/h of its size, highest CEER

    TCL T14WV9S14,000 BTU/h

    Up to 700 sq ft, window, CEER 16.

  • Nearest smaller unit

    TCL T12WV4S12,000 BTU/h

    Up to 550 sq ft, window, CEER 16.

DOE record

Cooling

Cooling capacity
14,000 BTU/h
Efficiency (CEER)
16.8 Btu/Wh
Power input
1,230 W

Build

Mount
Window
Heat pump
No

Record

DOE basic model
LW1427S
DOE class
(4) Without reverse cycle, with louvered sides, and 14,000 to 19,999 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 700 sq ft. ENERGY STAR's sizing chart calls for 14,000 BTU/h in rooms up to 700 sq ft. A sunny room, a kitchen or a high ceiling needs more.
How much does the LG LW1427S cost to run for 8 hours?
About $1.79 for 8 hours of cooling: roughly 1,230 W at 18.16¢/kWh, the US residential average for August 2026 (EIA).