WattCost

Data through June 2026

Running cost · Room Air Conditioners · ENERGY STAR certified

Midea MAT12R2SWTK

Under the DOE test basis of 750 hours a year, the Midea MAT12R2SWTK draws 648 kWh — about $119 at the U.S. average rate, concentrated in the months you actually run it. That's close to the middle of the certified pack — about 22% above the median room air conditioner, ranked 328 of 439. The same unit costs $85 a year in Nevada but $341 in Hawaii — electricity rates, not the appliance, make the difference. It also meets ENERGY STAR's stricter “Most Efficient” criteria.

Uses 46% less energy than the U.S. federal minimum

Dimensions 14.7" H × 24.1" W × 20.9" D, 59.1 lb

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

$119/yr

$48 · cheapest certified room air conditioners$384 · priciest
Per month
$9.90
Per day
33¢
Certified use
648 kWh/yr
Cooling capacity
12,000 BTU/hr
CEER
13.9
Mounting
Does Not Straddle Window or Windowsill
Variable-speed compressor
Yes
260 kWh2,096 kWh
Where the Midea MAT12R2SWTK (▮) sits among all 439 certified room air conditioners, by annual kWh

What it costs in every state

Midea MAT12R2SWTK: 648 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama16.4¢$106
Alaska28.2¢$183
Arizona15.2¢$98
Arkansas14.1¢$91
California34.7¢$225
Colorado17.1¢$111
Connecticut24.3¢$157
Delaware19.3¢$125
District of Columbia24.4¢$158
Florida15.1¢$98
Georgia16.4¢$106
Hawaiipriciest52.7¢$341
Idaho14.4¢$93
Illinois19.9¢$129
Indiana17.5¢$113
Iowa15.9¢$103
Kansas15.7¢$102
Kentucky14.3¢$92
Louisiana13.5¢$87
Maine29.6¢$192
Maryland21.8¢$141
Massachusetts29.6¢$192
Michigan23.0¢$149
Minnesota17.5¢$113
Mississippi14.9¢$96
Missouri16.2¢$105
Montana15.1¢$98
Nebraska13.3¢$86
Nevadacheapest13.1¢$85
New Hampshire27.0¢$175
New Jersey24.9¢$162
New Mexico15.1¢$98
New York29.5¢$191
North Carolina14.7¢$95
North Dakota14.1¢$91
Ohio19.2¢$124
Oklahoma14.3¢$93
Oregon16.3¢$106
Pennsylvania21.7¢$141
Rhode Island29.2¢$189
South Carolina15.6¢$101
South Dakota15.4¢$99
Tennessee14.1¢$91
Texas15.9¢$103
Utah13.4¢$87
Vermont24.4¢$158
Virginia17.2¢$111
Washington14.9¢$97
West Virginia15.4¢$100
Wisconsin19.6¢$127
Wyoming15.2¢$99

Certified models closest in efficiency

room air conditioners within reach of 648 kWh/yr
ModelkWh/yr$/yr (US avg)
Brothers 102396most efficient648$119
Brothers 102398most efficient648$119
Midea MAT12R1FWTKmost efficient648$119
Midea MAT12R1SWTKmost efficient648$119
Midea MAT12R2FWTKmost efficient648$119
Midea MWEUTW-12CRFN8-BCM9most efficient648$119

Run your own numbers

Your rate, your numbers

Per day
33¢
Per month
$9.90
Per year
$119

648 kWh/yr × 18.3¢/kWh = $119/yr

Prefilled with this model's certified 648 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 Midea MAT12R2SWTK use?
ENERGY STAR certifies the Midea MAT12R2SWTK at 648 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 Midea MAT12R2SWTK cost to run per month?
About $9.90 a month at the U.S. average residential rate (18.3¢/kWh) — 33¢ a day, or $119 a year. Your state's rate moves this up or down; see the table above.
Is the Midea MAT12R2SWTK energy efficient?
It uses 22% more electricity than the median certified room air conditioner. It also meets ENERGY STAR's Most Efficient criteria.
What does the Midea MAT12R2SWTK cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $85 a year in Nevada (13.1¢/kWh) and $341 in Hawaii (52.7¢/kWh).

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