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Can air purifiers protect you from the coronavirus?

Can air purifiers protect you from the coronavirus?


Understanding the science of air purifiers and viruses
Air purifiers use fans to draw in air and pass it through a filter before expelling the purified air out the other side. They’re particularly effective at removing odors and large particulates from the air. If you suffer from pet allergies, for example, an air purifier can help capture the dander and reduce your symptoms. On the other hand, there is a limit to what an air purifier can capture.

Even the most powerful air purifiers can only capture particles as small as 0.1 microns or larger, and the vast majority of air purifiers will only capture particles 0.3 microns or larger. A micron is a unit of measurement equal to one-millionth of a meter, sometimes called a micrometer.

The primary culprits of poor indoor air quality are larger than this size limit; mold, pollen, and pet dander are all larger and can be caught and eliminated by a standard HEPA filter. That slight margin of error is why air purifiers claim an effective rate of 99%.

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