WattCost

Data through June 2026

Running cost · Air Purifiers · ENERGY STAR certified

Atmosphere Sky 120539

The Atmosphere Sky 120539's certified consumption is 298 kWh per year, which prices out to about $55 at the national average rate — your hours of use scale that directly. It sits near the bottom of the certified table — using 101% more than the median air purifier (rank 187 of 225) — so the state you live in matters more than usual. The same unit costs $39 a year in Nevada but $157 in Hawaii — electricity rates, not the appliance, make the difference. 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

$55/yr

$5.50 · cheapest certified air purifiers$90 · priciest
Per month
$4.55
Per day
15¢
Certified use
298 kWh/yr
Rated room size
490 sq ft
CADR (smoke)
316
Technology
Fan and Filter
Efficiency
6.1 CFM/W
30 kWh490 kWh
Where the Atmosphere Sky 120539 (▮) sits among all 225 certified air purifiers, by annual kWh

What it costs in every state

Atmosphere Sky 120539: 298 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama16.4¢$49
Alaska28.2¢$84
Arizona15.2¢$45
Arkansas14.1¢$42
California34.7¢$104
Colorado17.1¢$51
Connecticut24.3¢$72
Delaware19.3¢$57
District of Columbia24.4¢$73
Florida15.1¢$45
Georgia16.4¢$49
Hawaiipriciest52.7¢$157
Idaho14.4¢$43
Illinois19.9¢$59
Indiana17.5¢$52
Iowa15.9¢$47
Kansas15.7¢$47
Kentucky14.3¢$42
Louisiana13.5¢$40
Maine29.6¢$88
Maryland21.8¢$65
Massachusetts29.6¢$88
Michigan23.0¢$69
Minnesota17.5¢$52
Mississippi14.9¢$44
Missouri16.2¢$48
Montana15.1¢$45
Nebraska13.3¢$39
Nevadacheapest13.1¢$39
New Hampshire27.0¢$80
New Jersey24.9¢$74
New Mexico15.1¢$45
New York29.5¢$88
North Carolina14.7¢$44
North Dakota14.1¢$42
Ohio19.2¢$57
Oklahoma14.3¢$43
Oregon16.3¢$49
Pennsylvania21.7¢$65
Rhode Island29.2¢$87
South Carolina15.6¢$46
South Dakota15.4¢$46
Tennessee14.1¢$42
Texas15.9¢$48
Utah13.4¢$40
Vermont24.4¢$73
Virginia17.2¢$51
Washington14.9¢$44
West Virginia15.4¢$46
Wisconsin19.6¢$58
Wyoming15.2¢$45

Certified models closest in efficiency

air purifiers within reach of 298 kWh/yr
ModelkWh/yr$/yr (US avg)
Midea KJ500G-L1297$54
Midea KJ500G-L1299$55
Noma 143-0033-2297$54
okaysou AirMac X7297$54
Sharp AirMac X7299$55
IQAir ATEM E295$54

Run your own numbers

Your rate, your numbers

Per day
15¢
Per month
$4.55
Per year
$55

298 kWh/yr × 18.3¢/kWh = $55/yr

Prefilled with this model's certified 298 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 Atmosphere Sky 120539 use?
ENERGY STAR certifies the Atmosphere Sky 120539 at 298 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 Atmosphere Sky 120539 cost to run per month?
About $4.55 a month at the U.S. average residential rate (18.3¢/kWh) — 15¢ a day, or $55 a year. Your state's rate moves this up or down; see the table above.
Is the Atmosphere Sky 120539 energy efficient?
It uses 101% more electricity than the median certified air purifier, which puts it among the least efficient certified models.
What does the Atmosphere Sky 120539 cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $39 a year in Nevada (13.1¢/kWh) and $157 in Hawaii (52.7¢/kWh).

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