WattCost

Data through June 2026

Running cost · Air Purifiers · ENERGY STAR certified

Coway AP-3018B

The Coway AP-3018B's certified consumption is 235 kWh per year, which prices out to about $43 at the national average rate — your hours of use scale that directly. Efficiency-wise it's unremarkable in a good way: within 59% of the median certified air purifier (rank 159 of 225). The same unit costs $31 a year in Nevada but $124 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 (225 models), so rankings shift more with each data refresh.

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

$43/yr

$5.50 · cheapest certified air purifiers$90 · priciest
Per month
$3.59
Per day
12¢
Certified use
235 kWh/yr
Rated room size
640 sq ft
CADR (smoke)
413
Technology
Fan and Filter
Efficiency
10.5 CFM/W
30 kWh490 kWh
Where the Coway AP-3018B (▮) sits among all 225 certified air purifiers, by annual kWh

What it costs in every state

Coway AP-3018B: 235 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama16.4¢$39
Alaska28.2¢$66
Arizona15.2¢$36
Arkansas14.1¢$33
California34.7¢$82
Colorado17.1¢$40
Connecticut24.3¢$57
Delaware19.3¢$45
District of Columbia24.4¢$57
Florida15.1¢$35
Georgia16.4¢$38
Hawaiipriciest52.7¢$124
Idaho14.4¢$34
Illinois19.9¢$47
Indiana17.5¢$41
Iowa15.9¢$37
Kansas15.7¢$37
Kentucky14.3¢$34
Louisiana13.5¢$32
Maine29.6¢$70
Maryland21.8¢$51
Massachusetts29.6¢$70
Michigan23.0¢$54
Minnesota17.5¢$41
Mississippi14.9¢$35
Missouri16.2¢$38
Montana15.1¢$36
Nebraska13.3¢$31
Nevadacheapest13.1¢$31
New Hampshire27.0¢$63
New Jersey24.9¢$59
New Mexico15.1¢$35
New York29.5¢$69
North Carolina14.7¢$35
North Dakota14.1¢$33
Ohio19.2¢$45
Oklahoma14.3¢$34
Oregon16.3¢$38
Pennsylvania21.7¢$51
Rhode Island29.2¢$69
South Carolina15.6¢$37
South Dakota15.4¢$36
Tennessee14.1¢$33
Texas15.9¢$37
Utah13.4¢$31
Vermont24.4¢$57
Virginia17.2¢$40
Washington14.9¢$35
West Virginia15.4¢$36
Wisconsin19.6¢$46
Wyoming15.2¢$36

Certified models closest in efficiency

air purifiers within reach of 235 kWh/yr
ModelkWh/yr$/yr (US avg)
Blueair 4312111000most efficient235$43
LEVOIT LAP-C401S-WUSR235$43
Winix C610235$43
Winix C710235$43
LEVOIT Core 400S237$43
Amazon Basics AP5110-UL240$44

Run your own numbers

Your rate, your numbers

Per day
12¢
Per month
$3.59
Per year
$43

235 kWh/yr × 18.3¢/kWh = $43/yr

Prefilled with this model's certified 235 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 AP-3018B use?
ENERGY STAR certifies the Coway AP-3018B at 235 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 AP-3018B cost to run per month?
About $3.59 a month at the U.S. average residential rate (18.3¢/kWh) — 12¢ a day, or $43 a year. Your state's rate moves this up or down; see the table above.
Is the Coway AP-3018B energy efficient?
It uses 59% more electricity than the median certified air purifier. It also meets ENERGY STAR's Most Efficient criteria.
What does the Coway AP-3018B cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $31 a year in Nevada (13.1¢/kWh) and $124 in Hawaii (52.7¢/kWh).

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