WattCost

Data through April 2026

Running cost · Room Air Conditioners · ENERGY STAR certified

Whirlpool WHAW-151IN

Under the DOE test basis of 750 hours a year, the Whirlpool WHAW-151IN draws 781 kWh — about $147 at the U.S. average rate, concentrated in the months you actually run it. It sits near the bottom of the certified table — using 47% more than the median room air conditioner (rank 341 of 396) — so the state you live in matters more than usual. The same unit costs $96 a year in North Dakota but $364 in Hawaii — electricity rates, not the appliance, make the difference.

Estimated annual running cost · U.S. average rate 18.8¢/kWh

$147/yr

$52 · cheapest certified room air conditioners$395 · priciest
Per month
$12.26
Per day
40¢
Certified use
781 kWh/yr
Cooling capacity
15,000 BTU/hr
CEER
14.4
Mounting
Straddles Window
Variable-speed compressor
Yes
274 kWh2,096 kWh
Where the Whirlpool WHAW-151IN (▮) sits among all 396 certified room air conditioners, by annual kWh

What it costs in every state

Whirlpool WHAW-151IN: 781 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama17.4¢$136
Alaska27.4¢$214
Arizona15.5¢$121
Arkansas14.2¢$111
California35.3¢$275
Colorado16.5¢$129
Connecticut32.2¢$252
Delaware18.8¢$147
District of Columbia25.4¢$199
Florida15.4¢$120
Georgia15.4¢$120
Hawaiipriciest46.6¢$364
Idaho12.7¢$99
Illinois20.5¢$160
Indiana17.9¢$140
Iowa13.9¢$108
Kansas15.8¢$123
Kentucky15.0¢$117
Louisiana14.4¢$113
Maine28.4¢$222
Maryland22.1¢$172
Massachusetts29.4¢$230
Michigan21.4¢$167
Minnesota16.4¢$128
Mississippi16.8¢$131
Missouri14.0¢$109
Montana13.9¢$109
Nebraska13.3¢$104
Nevada14.3¢$112
New Hampshire27.2¢$213
New Jersey23.5¢$184
New Mexico15.2¢$118
New York29.4¢$230
North Carolina16.3¢$127
North Dakotacheapest12.3¢$96
Ohio19.5¢$152
Oklahoma13.3¢$104
Oregon15.8¢$123
Pennsylvania21.5¢$168
Rhode Island28.3¢$221
South Carolina17.1¢$133
South Dakota14.5¢$113
Tennessee14.9¢$117
Texas17.0¢$133
Utah13.3¢$104
Vermont24.6¢$192
Virginia17.4¢$136
Washington14.4¢$112
West Virginia16.1¢$125
Wisconsin19.2¢$150
Wyoming14.7¢$115

Certified models closest in efficiency

room air conditioners within reach of 781 kWh/yr
ModelkWh/yr$/yr (US avg)
Friedrich CCV15A10A781$147
TCL H15W4KW781$147
TCL H15W4KW-CA781$147
TCL T15WQ2S781$147
Friedrich WCVT12B10A767$144
Midea MAT14R2FWTKmost efficient755$142

Run your own numbers

Your rate, your numbers

Per day
40¢
Per month
$12.26
Per year
$147

781 kWh/yr × 18.8¢/kWh = $147/yr

Prefilled with this model's certified 781 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 Whirlpool WHAW-151IN use?
ENERGY STAR certifies the Whirlpool WHAW-151IN at 781 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 Whirlpool WHAW-151IN cost to run per month?
About $12.26 a month at the U.S. average residential rate (18.8¢/kWh) — 40¢ a day, or $147 a year. Your state's rate moves this up or down; see the table above.
Is the Whirlpool WHAW-151IN energy efficient?
It uses 47% more electricity than the median certified room air conditioner, which puts it among the least efficient certified models.
What does the Whirlpool WHAW-151IN cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $96 a year in North Dakota (12.3¢/kWh) and $364 in Hawaii (46.6¢/kWh).

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