WattCost

Data through June 2026

Running cost · Room Air Conditioners · ENERGY STAR certified

LG LW1822IVSM

The LG LW1822IVSM is certified at 918 kWh per year (based on 750 standardized hours), roughly $168 at the national average — though seasonal use means your real bill lands in a few months, not twelve. Even among certified models it's on the thirsty end: 73% more electricity than the median room air conditioner, ranked 395 of 439. The same unit costs $120 a year in Nevada but $484 in Hawaii — electricity rates, not the appliance, make the difference.

Uses 37% less energy than the U.S. federal minimum

Dimensions 17.7" H × 26" W × 30.7" D, 112 lb

Estimated annual running cost · U.S. average rate 18.3¢/kWh

$168/yr

$48 · cheapest certified room air conditioners$384 · priciest
Per month
$14.04
Per day
46¢
Certified use
918 kWh/yr
Cooling capacity
18,000 BTU/hr
CEER
14.7
Mounting
Does Not Straddle Window or Windowsill
Variable-speed compressor
Yes
260 kWh2,096 kWh
Where the LG LW1822IVSM (▮) sits among all 439 certified room air conditioners, by annual kWh

What it costs in every state

LG LW1822IVSM: 918 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama16.4¢$151
Alaska28.2¢$259
Arizona15.2¢$139
Arkansas14.1¢$130
California34.7¢$319
Colorado17.1¢$157
Connecticut24.3¢$223
Delaware19.3¢$177
District of Columbia24.4¢$224
Florida15.1¢$139
Georgia16.4¢$150
Hawaiipriciest52.7¢$484
Idaho14.4¢$132
Illinois19.9¢$183
Indiana17.5¢$161
Iowa15.9¢$146
Kansas15.7¢$144
Kentucky14.3¢$131
Louisiana13.5¢$124
Maine29.6¢$272
Maryland21.8¢$201
Massachusetts29.6¢$272
Michigan23.0¢$211
Minnesota17.5¢$161
Mississippi14.9¢$137
Missouri16.2¢$149
Montana15.1¢$139
Nebraska13.3¢$122
Nevadacheapest13.1¢$120
New Hampshire27.0¢$248
New Jersey24.9¢$229
New Mexico15.1¢$138
New York29.5¢$271
North Carolina14.7¢$135
North Dakota14.1¢$130
Ohio19.2¢$176
Oklahoma14.3¢$132
Oregon16.3¢$150
Pennsylvania21.7¢$200
Rhode Island29.2¢$268
South Carolina15.6¢$143
South Dakota15.4¢$141
Tennessee14.1¢$129
Texas15.9¢$146
Utah13.4¢$123
Vermont24.4¢$224
Virginia17.2¢$158
Washington14.9¢$137
West Virginia15.4¢$142
Wisconsin19.6¢$180
Wyoming15.2¢$140

Certified models closest in efficiency

room air conditioners within reach of 918 kWh/yr
ModelkWh/yr$/yr (US avg)
Frigidaire FHWW185WE2900$165
Hisense AW1823TW3W900$165
Keplerx KBRC18RSVE2900$165
Keystone KSTAW182WA900$165
Midea MAW18R2VWT900$165
Midea MAW18RV1CWT900$165

Run your own numbers

Your rate, your numbers

Per day
46¢
Per month
$14.03
Per year
$168

918 kWh/yr × 18.3¢/kWh = $168/yr

Prefilled with this model's certified 918 kWh/yr — adjust if your usage differs from the DOE test basis. The certified annual kWh assumes 750 cooling hours per year (the DOE standard). In hot climates real usage can run well above that; in mild ones, below.

Questions, answered with the data

How much electricity does the LG LW1822IVSM use?
ENERGY STAR certifies the LG LW1822IVSM at 918 kWh per year. The certified annual kWh assumes 750 cooling hours per year (the DOE standard). In hot climates real usage can run well above that; in mild ones, below.
How much does the LG LW1822IVSM cost to run per month?
About $14.04 a month at the U.S. average residential rate (18.3¢/kWh) — 46¢ a day, or $168 a year. Your state's rate moves this up or down; see the table above.
Is the LG LW1822IVSM energy efficient?
It uses 73% more electricity than the median certified room air conditioner, which puts it among the least efficient certified models.
What does the LG LW1822IVSM cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $120 a year in Nevada (13.1¢/kWh) and $484 in Hawaii (52.7¢/kWh).

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