How Much Electricity Does an Air Purifier Use?
How much electricity does an air purifier use? About 58 watts at top speed. Enter yours below for the exact cost.
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Air purifier electricity cost calculator
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How the math works: 58 W × 24 hours ÷ 1,000 = 1.392 kWh a day. × 30 days = 41.76 kWh a month. × $0.165 per kWh (the 2024 U.S. average) = about $6.89 a month.
Air purifiers are low-wattage appliances, averaging around 58 watts at top fan speed across independently tested models, though the most efficient units draw under 10 watts. Even run continuously, that's a modest cost.
What affects how much electricity an air purifier uses
- Fan speed: the main factor. Higher speeds move more air through the filter and draw more power.
- Unit size: a purifier built for a large open living area typically draws more than a compact bedroom model.
- Specific model: independent testing has found a wide spread between the most and least efficient models, so the unit you own matters more here than with many appliances.
How to reduce your air purifier's electricity use
- Run it on a lower or automatic fan speed rather than always on high
- Choose a room-appropriately sized unit rather than an oversized one running on a low setting to compensate
- Replace or clean the filter on schedule, since a clogged filter can force the fan to work harder
- Use auto mode with an air quality sensor, if your model has one, so it ramps up only when needed
Typical wattage figure: roughly 25-100 W, averaging about 58 W at top fan speed across independently tested models. Source: HouseFresh: independent lab testing of 60 air purifier models. This comes from independent product testing rather than a government source. Larger units built for bigger rooms generally draw more than smaller ones. We review this figure periodically and update it if the source changes; last checked September 2026.
Frequently asked questions
How many watts does an air purifier use?
Independent testing of 60 air purifier models found an average draw of about 58 watts at top fan speed, with the most efficient models using under 10 watts and less efficient ones using considerably more. This comes from independent product testing rather than a government source.
How much does it cost to run an air purifier?
A 58-watt purifier run continuously (24 hours a day) at the U.S. average rate of about 16.5 cents/kWh costs roughly $0.23 a day, or about $7 a month. Use the calculator above with your own purifier's wattage and typical runtime for an exact figure.
Is it okay to run an air purifier 24/7?
Yes, most air purifiers are designed to run continuously, and because their wattage is relatively low compared to most other household appliances, running one around the clock is a modest addition to a monthly bill for most models.
How can I reduce how much electricity my air purifier uses?
Run it on a lower or automatic fan speed instead of always on high, keep the filter clean or replaced on schedule so the fan doesn't have to work harder, and choose a unit sized appropriately for the room rather than an oversized one.
This page provides estimates based on independent product testing rather than a government source, and the numbers you enter. Actual electricity cost depends on your specific model and fan speed setting.