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Data through June 2026

Running cost · Air Purifiers · ENERGY STAR certified

Coway Airmega AP-1125G

At the standardized usage ENERGY STAR assumes, the Coway Airmega AP-1125G consumes 195 kWh a year — about $36 at the U.S. average electricity rate ($2.98 a month). That's close to the middle of the certified pack — about 32% above the median air purifier, ranked 135 of 225. Where you live moves the bill from $26 a year in Nevada to $103 in Hawaii. Note the certified pool here is small (225 models), so rankings shift more with each data refresh.

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

$36/yr

$5.50 · cheapest certified air purifiers$90 · priciest
Per month
$2.98
Per day
10¢
Certified use
195 kWh/yr
Rated room size
287 sq ft
CADR (smoke)
185
Technology
Fan and Filter
Efficiency
5.8 CFM/W
30 kWh490 kWh
Where the Coway Airmega AP-1125G (▮) sits among all 225 certified air purifiers, by annual kWh

What it costs in every state

Coway Airmega AP-1125G: 195 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama16.4¢$32
Alaska28.2¢$55
Arizona15.2¢$30
Arkansas14.1¢$28
California34.7¢$68
Colorado17.1¢$33
Connecticut24.3¢$47
Delaware19.3¢$38
District of Columbia24.4¢$48
Florida15.1¢$29
Georgia16.4¢$32
Hawaiipriciest52.7¢$103
Idaho14.4¢$28
Illinois19.9¢$39
Indiana17.5¢$34
Iowa15.9¢$31
Kansas15.7¢$31
Kentucky14.3¢$28
Louisiana13.5¢$26
Maine29.6¢$58
Maryland21.8¢$43
Massachusetts29.6¢$58
Michigan23.0¢$45
Minnesota17.5¢$34
Mississippi14.9¢$29
Missouri16.2¢$32
Montana15.1¢$30
Nebraska13.3¢$26
Nevadacheapest13.1¢$26
New Hampshire27.0¢$53
New Jersey24.9¢$49
New Mexico15.1¢$29
New York29.5¢$58
North Carolina14.7¢$29
North Dakota14.1¢$28
Ohio19.2¢$37
Oklahoma14.3¢$28
Oregon16.3¢$32
Pennsylvania21.7¢$42
Rhode Island29.2¢$57
South Carolina15.6¢$30
South Dakota15.4¢$30
Tennessee14.1¢$27
Texas15.9¢$31
Utah13.4¢$26
Vermont24.4¢$48
Virginia17.2¢$34
Washington14.9¢$29
West Virginia15.4¢$30
Wisconsin19.6¢$38
Wyoming15.2¢$30

Certified models closest in efficiency

air purifiers within reach of 195 kWh/yr
ModelkWh/yr$/yr (US avg)
AIRMEGA AP-1125G195$36
Coway AP-1125G195$36
LEVOIT LAP-C511S-WUSmost efficient194$36
AIRMEGA W197$36
Blueair 3332111100193$35
Coway Airmega W197$36

Run your own numbers

Your rate, your numbers

Per day
10¢
Per month
$2.98
Per year
$36

195 kWh/yr × 18.3¢/kWh = $36/yr

Prefilled with this model's certified 195 kWh/yr — adjust if your usage differs from the DOE test basis. The certified annual kWh comes from the ENERGY STAR room air cleaner test basis, which assumes continuous daily operation. Running fewer hours costs proportionally less.

Questions, answered with the data

How much electricity does the Coway Airmega AP-1125G use?
ENERGY STAR certifies the Coway Airmega AP-1125G at 195 kWh per year. The certified annual kWh comes from the ENERGY STAR room air cleaner test basis, which assumes continuous daily operation. Running fewer hours costs proportionally less.
How much does the Coway Airmega AP-1125G cost to run per month?
About $2.98 a month at the U.S. average residential rate (18.3¢/kWh) — 10¢ a day, or $36 a year. Your state's rate moves this up or down; see the table above.
Is the Coway Airmega AP-1125G energy efficient?
It uses 32% more electricity than the median certified air purifier.
What does the Coway Airmega AP-1125G cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $26 a year in Nevada (13.1¢/kWh) and $103 in Hawaii (52.7¢/kWh).

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