WattCost

Data through June 2026

Running cost · Room Air Conditioners · ENERGY STAR certified

Brothers 102378

The Brothers 102378 is certified at 426 kWh per year (based on 750 standardized hours), roughly $78 at the national average — though seasonal use means your real bill lands in a few months, not twelve. That's 20% less than the median certified room air conditioner, placing it comfortably in the efficient third of the field (127 of 439). Where you live moves the bill from $56 a year in Nevada to $224 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, 53.8 lb

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

$78/yr

$48 · cheapest certified room air conditioners$384 · priciest
Per month
$6.50
Per day
21¢
Certified use
426 kWh/yr
Cooling capacity
8,000 BTU/hr
CEER
14.1
Mounting
Does Not Straddle Window or Windowsill
Variable-speed compressor
Yes
260 kWh2,096 kWh
Where the Brothers 102378 (▮) sits among all 439 certified room air conditioners, by annual kWh

What it costs in every state

Brothers 102378: 426 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama16.4¢$70
Alaska28.2¢$120
Arizona15.2¢$65
Arkansas14.1¢$60
California34.7¢$148
Colorado17.1¢$73
Connecticut24.3¢$103
Delaware19.3¢$82
District of Columbia24.4¢$104
Florida15.1¢$64
Georgia16.4¢$70
Hawaiipriciest52.7¢$224
Idaho14.4¢$61
Illinois19.9¢$85
Indiana17.5¢$75
Iowa15.9¢$68
Kansas15.7¢$67
Kentucky14.3¢$61
Louisiana13.5¢$57
Maine29.6¢$126
Maryland21.8¢$93
Massachusetts29.6¢$126
Michigan23.0¢$98
Minnesota17.5¢$75
Mississippi14.9¢$63
Missouri16.2¢$69
Montana15.1¢$64
Nebraska13.3¢$56
Nevadacheapest13.1¢$56
New Hampshire27.0¢$115
New Jersey24.9¢$106
New Mexico15.1¢$64
New York29.5¢$125
North Carolina14.7¢$63
North Dakota14.1¢$60
Ohio19.2¢$82
Oklahoma14.3¢$61
Oregon16.3¢$69
Pennsylvania21.7¢$92
Rhode Island29.2¢$124
South Carolina15.6¢$66
South Dakota15.4¢$65
Tennessee14.1¢$60
Texas15.9¢$68
Utah13.4¢$57
Vermont24.4¢$104
Virginia17.2¢$73
Washington14.9¢$63
West Virginia15.4¢$66
Wisconsin19.6¢$83
Wyoming15.2¢$65

Certified models closest in efficiency

room air conditioners within reach of 426 kWh/yr
ModelkWh/yr$/yr (US avg)
Midea MAT08R1FWTKmost efficient426$78
Midea MAT08R1SWTKmost efficient426$78
Midea MWEUTW-08CRFN8-BCN1most efficient426$78
Seasons ST08VB1most efficient426$78
LG LW8024IVSM425$78
Midea MAW08S1KWT-A427$78

Run your own numbers

Your rate, your numbers

Per day
21¢
Per month
$6.51
Per year
$78

426 kWh/yr × 18.3¢/kWh = $78/yr

Prefilled with this model's certified 426 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 102378 use?
ENERGY STAR certifies the Brothers 102378 at 426 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 102378 cost to run per month?
About $6.50 a month at the U.S. average residential rate (18.3¢/kWh) — 21¢ a day, or $78 a year. Your state's rate moves this up or down; see the table above.
Is the Brothers 102378 energy efficient?
It uses 20% less electricity than the median certified room air conditioner, placing it in the efficient third of certified models. It also meets ENERGY STAR's Most Efficient criteria.
What does the Brothers 102378 cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $56 a year in Nevada (13.1¢/kWh) and $224 in Hawaii (52.7¢/kWh).

Keep digging