WattCost

Data through June 2026

Running cost · Room Air Conditioners · ENERGY STAR certified

Brothers 102399

The Brothers 102399 is certified at 532 kWh per year (based on 750 standardized hours), roughly $98 at the national average — though seasonal use means your real bill lands in a few months, not twelve. That's close to the middle of the certified pack — about 0% above the median room air conditioner, ranked 214 of 439. Where you live moves the bill from $70 a year in Nevada to $280 in Hawaii. It also meets ENERGY STAR's stricter “Most Efficient” criteria.

Uses 47% less energy than the U.S. federal minimum

Dimensions 14.7" H × 24.1" W × 20.9" D, 56.2 lb

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

$98/yr

$48 · cheapest certified room air conditioners$384 · priciest
Per month
$8.13
Per day
27¢
Certified use
532 kWh/yr
Cooling capacity
10,000 BTU/hr
CEER
14.1
Mounting
Does Not Straddle Window or Windowsill
Variable-speed compressor
Yes
260 kWh2,096 kWh
Where the Brothers 102399 (▮) sits among all 439 certified room air conditioners, by annual kWh

What it costs in every state

Brothers 102399: 532 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama16.4¢$87
Alaska28.2¢$150
Arizona15.2¢$81
Arkansas14.1¢$75
California34.7¢$185
Colorado17.1¢$91
Connecticut24.3¢$129
Delaware19.3¢$103
District of Columbia24.4¢$130
Florida15.1¢$80
Georgia16.4¢$87
Hawaiipriciest52.7¢$280
Idaho14.4¢$76
Illinois19.9¢$106
Indiana17.5¢$93
Iowa15.9¢$85
Kansas15.7¢$84
Kentucky14.3¢$76
Louisiana13.5¢$72
Maine29.6¢$157
Maryland21.8¢$116
Massachusetts29.6¢$157
Michigan23.0¢$122
Minnesota17.5¢$93
Mississippi14.9¢$79
Missouri16.2¢$86
Montana15.1¢$81
Nebraska13.3¢$70
Nevadacheapest13.1¢$70
New Hampshire27.0¢$144
New Jersey24.9¢$133
New Mexico15.1¢$80
New York29.5¢$157
North Carolina14.7¢$78
North Dakota14.1¢$75
Ohio19.2¢$102
Oklahoma14.3¢$76
Oregon16.3¢$87
Pennsylvania21.7¢$116
Rhode Island29.2¢$155
South Carolina15.6¢$83
South Dakota15.4¢$82
Tennessee14.1¢$75
Texas15.9¢$85
Utah13.4¢$71
Vermont24.4¢$130
Virginia17.2¢$92
Washington14.9¢$79
West Virginia15.4¢$82
Wisconsin19.6¢$104
Wyoming15.2¢$81

Certified models closest in efficiency

room air conditioners within reach of 532 kWh/yr
ModelkWh/yr$/yr (US avg)
Brothers 102397most efficient532$98
Midea MAT10R1FWTKmost efficient532$98
Midea MAT10R1SWTKmost efficient532$98
Midea MAT10R2FWTKmost efficient532$98
Midea MAT10R2SWTKmost efficient532$98
Midea MWEUTW-10CRFN8-BCN1most efficient532$98

Run your own numbers

Your rate, your numbers

Per day
27¢
Per month
$8.13
Per year
$98

532 kWh/yr × 18.3¢/kWh = $98/yr

Prefilled with this model's certified 532 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 Brothers 102399 use?
ENERGY STAR certifies the Brothers 102399 at 532 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 Brothers 102399 cost to run per month?
About $8.13 a month at the U.S. average residential rate (18.3¢/kWh) — 27¢ a day, or $98 a year. Your state's rate moves this up or down; see the table above.
Is the Brothers 102399 energy efficient?
It uses 0% less electricity than the median certified room air conditioner. It also meets ENERGY STAR's Most Efficient criteria.
What does the Brothers 102399 cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $70 a year in Nevada (13.1¢/kWh) and $280 in Hawaii (52.7¢/kWh).

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