WattCost

Data through April 2026

Running cost · Air Purifiers · ENERGY STAR certified

Coway Airmega ProX;Airmega ProX(W);Airmega ProX(*);AP-3522F_US;AP-3522F_WT;AP-3522F_

The Coway Airmega ProX;Airmega ProX(W);Airmega ProX(*);AP-3522F_US;AP-3522F_WT;AP-3522F_'s certified consumption is 335 kWh per year, which prices out to about $63 at the national average rate — your hours of use scale that directly. Even among certified models it's on the thirsty end: 126% more electricity than the median air purifier, ranked 189 of 214. The same unit costs $41 a year in North Dakota but $156 in Hawaii — electricity rates, not the appliance, make the difference. It also meets ENERGY STAR's stricter “Most Efficient” criteria. Note the certified pool here is small (214 models), so rankings shift more with each data refresh.

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

$63/yr

$5.65 · cheapest certified air purifiers$92 · priciest
Per month
$5.26
Per day
17¢
Certified use
335 kWh/yr
Rated room size
894 sq ft
CADR (smoke)
577
Technology
Fan and Filter
Efficiency
10.2 CFM/W
30 kWh490 kWh
Where the Coway Airmega ProX;Airmega ProX(W);Airmega ProX(*);AP-3522F_US;AP-3522F_WT;AP-3522F_ (▮) sits among all 214 certified air purifiers, by annual kWh

What it costs in every state

Coway Airmega ProX;Airmega ProX(W);Airmega ProX(*);AP-3522F_US;AP-3522F_WT;AP-3522F_: 335 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama17.4¢$58
Alaska27.4¢$92
Arizona15.5¢$52
Arkansas14.2¢$47
California35.3¢$118
Colorado16.5¢$55
Connecticut32.2¢$108
Delaware18.8¢$63
District of Columbia25.4¢$85
Florida15.4¢$52
Georgia15.4¢$51
Hawaiipriciest46.6¢$156
Idaho12.7¢$43
Illinois20.5¢$69
Indiana17.9¢$60
Iowa13.9¢$46
Kansas15.8¢$53
Kentucky15.0¢$50
Louisiana14.4¢$48
Maine28.4¢$95
Maryland22.1¢$74
Massachusetts29.4¢$99
Michigan21.4¢$72
Minnesota16.4¢$55
Mississippi16.8¢$56
Missouri14.0¢$47
Montana13.9¢$47
Nebraska13.3¢$44
Nevada14.3¢$48
New Hampshire27.2¢$91
New Jersey23.5¢$79
New Mexico15.2¢$51
New York29.4¢$99
North Carolina16.3¢$54
North Dakotacheapest12.3¢$41
Ohio19.5¢$65
Oklahoma13.3¢$45
Oregon15.8¢$53
Pennsylvania21.5¢$72
Rhode Island28.3¢$95
South Carolina17.1¢$57
South Dakota14.5¢$49
Tennessee14.9¢$50
Texas17.0¢$57
Utah13.3¢$45
Vermont24.6¢$82
Virginia17.4¢$58
Washington14.4¢$48
West Virginia16.1¢$54
Wisconsin19.2¢$64
Wyoming14.7¢$49

Certified models closest in efficiency

air purifiers within reach of 335 kWh/yr
ModelkWh/yr$/yr (US avg)
Coway Airmega Airmega ProX;AP-3522F_US;Airmega ProX(W);Airmega ProX(*);AP-3522F_WT;AP-3522F_most efficient335$63
Coway Airmega ProXmost efficient335$63
Blueair 6712211000336$63
Midea KJ600G-RX600A341$64
PURECODE PAR001341$64
Coway Airmega 350(W);Airmega 350(BG);Airmega 350(*);AP-1924A_WT;AP-1924A_BG; AP-1924A_344$65

Run your own numbers

Your rate, your numbers

Per day
17¢
Per month
$5.26
Per year
$63

335 kWh/yr × 18.8¢/kWh = $63/yr

Prefilled with this model's certified 335 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 ProX;Airmega ProX(W);Airmega ProX(*);AP-3522F_US;AP-3522F_WT;AP-3522F_ use?
ENERGY STAR certifies the Coway Airmega ProX;Airmega ProX(W);Airmega ProX(*);AP-3522F_US;AP-3522F_WT;AP-3522F_ at 335 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 ProX;Airmega ProX(W);Airmega ProX(*);AP-3522F_US;AP-3522F_WT;AP-3522F_ cost to run per month?
About $5.26 a month at the U.S. average residential rate (18.8¢/kWh) — 17¢ a day, or $63 a year. Your state's rate moves this up or down; see the table above.
Is the Coway Airmega ProX;Airmega ProX(W);Airmega ProX(*);AP-3522F_US;AP-3522F_WT;AP-3522F_ energy efficient?
It uses 126% more electricity than the median certified air purifier, which puts it among the least efficient certified models. It also meets ENERGY STAR's Most Efficient criteria.
What does the Coway Airmega ProX;Airmega ProX(W);Airmega ProX(*);AP-3522F_US;AP-3522F_WT;AP-3522F_ cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $41 a year in North Dakota (12.3¢/kWh) and $156 in Hawaii (46.6¢/kWh).

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