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Air Purification and Covid-19

With growing concerns of COVID-19 and other airborne viruses, and their effects on indoor air quality, more people are looking for ways to purify the air in their homes. Recently, we’ve received many questions about the ability of our air purifiers to guard against airborne coronavirus, as well as the general effectiveness of HEPA filters. We would like to share some facts below to help you make a more informed decision about your next HEPA filter or HEPA air purifier purchase.


1. Coronavirus particle size ranges from 80 to 160 nanometers (0.08 to 0.16 microns). H1N1 influenza virus size ranges from 80 to 120 nanometers in diameter.


2. While single virus particles exist in the air, they tend to aggregate rapidly. Aggregation speed depends on the size and distribution of the airborne particles, the concentration of the aerosol, and the thermodynamic conditions. In other words, airborne viruses tend to aggregate to form large particles rather than remain as individual particles, which are usually bigger than 0.16 microns.


3. Our advanced BioGS® HEPA filtration system is true HEPA rated. It traps allergens and particles down to less than 0.1 microns in size at higher than 99% efficiency. It can also reduce the growth of bacteria and viruses on our filter over time.


In conclusion, theoretically, most of the true HEPA-rated filters and air purifiers can trap airborne viruses to certain degrees. Since both coronavirus and H1N1 influenza virus particles are within the range that a true HEPA rated filter can capture very effectively, we’re pretty confident that they will be trapped and reduced by our HEPA filter just like pollen, mold spores, dust, etc. That said, we cannot make official claims on the effectiveness of our products on coronavirus particle capture, since we don’t have conclusive test reports yet and therefore can not substantiate them.

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