WattCost

Data through June 2026

Running cost · Room Air Conditioners · ENERGY STAR certified

TCL H15W4KW-CA

The TCL H15W4KW-CA is certified at 781 kWh per year (based on 750 standardized hours), roughly $143 at the national average — though seasonal use means your real bill lands in a few months, not twelve. It sits near the bottom of the certified table — using 47% more than the median room air conditioner (rank 377 of 439) — so the state you live in matters more than usual. Where you live moves the bill from $102 a year in Nevada to $412 in Hawaii.

Uses 35% less energy than the U.S. federal minimum

Dimensions 15.3" H × 26" W × 27.5" D, 102 lb

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

$143/yr

$48 · cheapest certified room air conditioners$384 · priciest
Per month
$11.94
Per day
39¢
Certified use
781 kWh/yr
Cooling capacity
15,000 BTU/hr
CEER
14.4
Mounting
Straddles Window
Variable-speed compressor
Yes
260 kWh2,096 kWh
Where the TCL H15W4KW-CA (▮) sits among all 439 certified room air conditioners, by annual kWh

What it costs in every state

TCL H15W4KW-CA: 781 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama16.4¢$128
Alaska28.2¢$220
Arizona15.2¢$119
Arkansas14.1¢$110
California34.7¢$271
Colorado17.1¢$134
Connecticut24.3¢$190
Delaware19.3¢$151
District of Columbia24.4¢$191
Florida15.1¢$118
Georgia16.4¢$128
Hawaiipriciest52.7¢$412
Idaho14.4¢$112
Illinois19.9¢$155
Indiana17.5¢$137
Iowa15.9¢$124
Kansas15.7¢$123
Kentucky14.3¢$111
Louisiana13.5¢$105
Maine29.6¢$231
Maryland21.8¢$171
Massachusetts29.6¢$231
Michigan23.0¢$180
Minnesota17.5¢$137
Mississippi14.9¢$116
Missouri16.2¢$127
Montana15.1¢$118
Nebraska13.3¢$104
Nevadacheapest13.1¢$102
New Hampshire27.0¢$211
New Jersey24.9¢$195
New Mexico15.1¢$118
New York29.5¢$230
North Carolina14.7¢$115
North Dakota14.1¢$110
Ohio19.2¢$150
Oklahoma14.3¢$112
Oregon16.3¢$128
Pennsylvania21.7¢$170
Rhode Island29.2¢$228
South Carolina15.6¢$121
South Dakota15.4¢$120
Tennessee14.1¢$110
Texas15.9¢$125
Utah13.4¢$104
Vermont24.4¢$191
Virginia17.2¢$135
Washington14.9¢$116
West Virginia15.4¢$121
Wisconsin19.6¢$153
Wyoming15.2¢$119

Certified models closest in efficiency

room air conditioners within reach of 781 kWh/yr
ModelkWh/yr$/yr (US avg)
Friedrich CCV15A10A781$143
TCL H15W4KW781$143
TCL T15WQ2S781$143
Whirlpool WHAW-151IN781$143
Friedrich WCVT12B10A767$141
Brothers 102395most efficient755$139

Run your own numbers

Your rate, your numbers

Per day
39¢
Per month
$11.94
Per year
$143

781 kWh/yr × 18.3¢/kWh = $143/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 TCL H15W4KW-CA use?
ENERGY STAR certifies the TCL H15W4KW-CA 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 TCL H15W4KW-CA cost to run per month?
About $11.94 a month at the U.S. average residential rate (18.3¢/kWh) — 39¢ a day, or $143 a year. Your state's rate moves this up or down; see the table above.
Is the TCL H15W4KW-CA 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 TCL H15W4KW-CA cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $102 a year in Nevada (13.1¢/kWh) and $412 in Hawaii (52.7¢/kWh).

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