WattCost

Data through April 2026

Running cost · Room Air Conditioners · ENERGY STAR certified

Midea MAW18S2KWT-A

Under the DOE test basis of 750 hours a year, the Midea MAW18S2KWT-A draws 844 kWh — about $159 at the U.S. average rate, concentrated in the months you actually run it. It sits near the bottom of the certified table — using 59% more than the median room air conditioner (rank 344 of 396) — so the state you live in matters more than usual. The same unit costs $104 a year in North Dakota but $393 in Hawaii — electricity rates, not the appliance, make the difference. It also meets ENERGY STAR's stricter “Most Efficient” criteria.

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

$159/yr

$52 · cheapest certified room air conditioners$395 · priciest
Per month
$13.24
Per day
44¢
Certified use
844 kWh/yr
Cooling capacity
18,000 BTU/hr
CEER
16
Mounting
Does Not Straddle Window or Windowsill
Variable-speed compressor
Yes
274 kWh2,096 kWh
Where the Midea MAW18S2KWT-A (▮) sits among all 396 certified room air conditioners, by annual kWh

What it costs in every state

Midea MAW18S2KWT-A: 844 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama17.4¢$147
Alaska27.4¢$231
Arizona15.5¢$131
Arkansas14.2¢$119
California35.3¢$297
Colorado16.5¢$140
Connecticut32.2¢$272
Delaware18.8¢$159
District of Columbia25.4¢$214
Florida15.4¢$130
Georgia15.4¢$130
Hawaiipriciest46.6¢$393
Idaho12.7¢$107
Illinois20.5¢$173
Indiana17.9¢$151
Iowa13.9¢$117
Kansas15.8¢$133
Kentucky15.0¢$127
Louisiana14.4¢$122
Maine28.4¢$240
Maryland22.1¢$186
Massachusetts29.4¢$248
Michigan21.4¢$180
Minnesota16.4¢$138
Mississippi16.8¢$141
Missouri14.0¢$118
Montana13.9¢$117
Nebraska13.3¢$112
Nevada14.3¢$121
New Hampshire27.2¢$230
New Jersey23.5¢$199
New Mexico15.2¢$128
New York29.4¢$248
North Carolina16.3¢$137
North Dakotacheapest12.3¢$104
Ohio19.5¢$164
Oklahoma13.3¢$112
Oregon15.8¢$133
Pennsylvania21.5¢$181
Rhode Island28.3¢$239
South Carolina17.1¢$144
South Dakota14.5¢$123
Tennessee14.9¢$126
Texas17.0¢$143
Utah13.3¢$112
Vermont24.6¢$207
Virginia17.4¢$147
Washington14.4¢$121
West Virginia16.1¢$136
Wisconsin19.2¢$162
Wyoming14.7¢$124

Certified models closest in efficiency

room air conditioners within reach of 844 kWh/yr
ModelkWh/yr$/yr (US avg)
Friedrich KCVS16B30A844$159
Midea MWCUWH-18CRFN8-MCP0most efficient844$159
Wallmaster WHVT14B33Bmost efficient838$158
Frigidaire FHWW185WE2900$169
Hisense AW1823TW3W900$169
Keplerx KBRC18RSVE2900$169

Run your own numbers

Your rate, your numbers

Per day
44¢
Per month
$13.24
Per year
$159

844 kWh/yr × 18.8¢/kWh = $159/yr

Prefilled with this model's certified 844 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 MAW18S2KWT-A use?
ENERGY STAR certifies the Midea MAW18S2KWT-A at 844 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 MAW18S2KWT-A cost to run per month?
About $13.24 a month at the U.S. average residential rate (18.8¢/kWh) — 44¢ a day, or $159 a year. Your state's rate moves this up or down; see the table above.
Is the Midea MAW18S2KWT-A energy efficient?
It uses 59% more electricity than the median certified room air conditioner, which puts it among the least efficient certified models. It also meets ENERGY STAR's Most Efficient criteria.
What does the Midea MAW18S2KWT-A cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $104 a year in North Dakota (12.3¢/kWh) and $393 in Hawaii (46.6¢/kWh).

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