Replacement air filter multipack
Keeps an air purifier, furnace, or window AC running efficiently instead of straining against a clogged filter.
Compare on AmazonCost to Run a Air purifier
Often left running continuously; wildfire smoke season and allergy season are common reasons usage jumps to 24 hours a day.
At the national average rate
$0.23Per day
$6.77Per month
$82.34Per year
Based on 50W, 24.0 hours/day, at 18.8¢/kWh (national average).
Typical wattage
| Low | Typical | High |
|---|---|---|
| 30W | 50W | 100W |
Get your exact number
Use your own wattage, hours per day, and electricity rate for a precise figure.
Cost by state
Alabama
17.4¢/kWh
Alaska
27.4¢/kWh
Arizona
15.5¢/kWh
Arkansas
14.2¢/kWh
California
35.2¢/kWh
Colorado
16.5¢/kWh
Connecticut
32.2¢/kWh
Delaware
18.8¢/kWh
Florida
15.4¢/kWh
Georgia
15.4¢/kWh
Hawaii
46.6¢/kWh
Idaho
12.7¢/kWh
Illinois
20.5¢/kWh
Indiana
17.9¢/kWh
Iowa
13.9¢/kWh
Kansas
15.8¢/kWh
Kentucky
15.0¢/kWh
Louisiana
14.4¢/kWh
Maine
28.4¢/kWh
Maryland
22.1¢/kWh
Massachusetts
29.4¢/kWh
Michigan
21.4¢/kWh
Minnesota
16.4¢/kWh
Mississippi
16.8¢/kWh
Missouri
14.0¢/kWh
Montana
13.9¢/kWh
Nebraska
13.3¢/kWh
Nevada
14.3¢/kWh
New Hampshire
27.2¢/kWh
New Jersey
23.5¢/kWh
New Mexico
15.2¢/kWh
New York
29.4¢/kWh
North Carolina
16.2¢/kWh
North Dakota
12.3¢/kWh
Ohio
19.5¢/kWh
Oklahoma
13.3¢/kWh
Oregon
15.8¢/kWh
Pennsylvania
21.5¢/kWh
Rhode Island
28.3¢/kWh
South Carolina
17.1¢/kWh
South Dakota
14.5¢/kWh
Tennessee
14.9¢/kWh
Texas
17.0¢/kWh
Utah
13.3¢/kWh
Vermont
24.6¢/kWh
Virginia
17.4¢/kWh
Washington
14.4¢/kWh
West Virginia
16.1¢/kWh
Wisconsin
19.2¢/kWh
Wyoming
14.7¢/kWh
Save on this appliance
These links go to an Amazon search so you can compare current options and prices.
HEPA air purifier
A HEPA air purifier sized to the room — useful for wildfire smoke season or nursery use.
Compare on AmazonPlug-in electricity usage monitor
Plugs in between the wall and any single appliance to show its real, measured electricity use instead of an estimate.
Compare on AmazonDoor and window weatherstripping kit
Seals air leaks around doors and windows, which reduces how hard heating and cooling appliances have to work.
Compare on AmazonReplacement air filter multipack
Keeps an air purifier, furnace, or window AC running efficiently instead of straining against a clogged filter.
Compare on AmazonIndoor hygrometer and thermometer
A humidity and temperature gauge that helps you judge whether a dehumidifier or heater actually needs to run.
Compare on AmazonRelated on HomeRuleCheck: the appliance cost calculator with your own rate and how to cut a home's electricity use.
Frequently asked questions
Why does this differ from my actual utility bill?
Nameplate wattage is often a maximum, not a constant draw. Cycling appliances like fridges and freezers, your exact usage pattern, and your utility's rate structure can all shift the real number.
Where do I find my appliance's actual wattage?
Check the nameplate or label on the unit itself, usually on the back or bottom, or the manufacturer spec sheet.
Should I use a plug-in energy monitor instead of estimating?
If you want an exact figure rather than an estimate, yes — a plug-in monitor measures actual draw over time, which accounts for cycling and real usage patterns an estimate cannot.
Does time-of-use electricity pricing change this?
Yes, if your utility charges different rates by time of day, your actual cost can differ from a flat-rate estimate — check your specific rate plan.