The COVID-19 virus is anywhere from 0.06 to 0.14 microns – way tinier than the 0.3 microns that the HEPA standard tests for. The bottom line on air purifiers and viruses Air purifiers are not meant to be the first line of defense against viruses. Social distancing, wearing masks, and practicing good hygiene should be your first lines of defense. The mass gathering in the hottest red zone of COVID-19 in the US was defended because the church recently installed an air purification system: “We’ve installed these units and it kills 99.9% of COVID within 10 minutes,” Zastro says. Do HEPA filters kill COVID-19? The virus which causes COVID-19 is about .125 micron , a size of particle that HEPA filters can capture effectively, The New York Times notes. How well air purifiers work against COVID-19 remains to be seen. "We want to be clear that at this time, no portable air purifier manufacturer has been able to test against the COVID-19 virus ... Do not use air cleaners that intentionally generate ozone in occupied spaces or that do not meet state regulations or industry standards for ozone generation. Portable air cleaners, also known as air purifiers or air sanitizers, are designed to filter the air in a single room or area. Central furnace or HVAC filters are designed to filter air throughout a home. Portable air cleaners and HVAC ... In general, place the air purifier near the person whose germs you want to avoid (the bedroom of someone sick with COVID-19, for example). When Corsi hosted a relative who works in care homes, he... No. Air purifiers that use HEPA filters, UV light or ionizers are fine. But inhaling ozone can cause coughing, throat irritation, shortness of breath and other issues, even in healthy individuals. Ozone can even result in lung damage, which is why local weather authorities sometimes issue ozone alerts. Air purifier manufacturer Meaco told us: ‘An air purifier can help in maintaining your general wellbeing, which can only be a positive to try and stay safe from COVID-19. But, given air purifiers have not yet been tested with COVID-19, we would not want anyone to think that an air purifier could save them from COVID-19 and everyone should concentrate on the NHS/government advice first and foremost.’ CNET: “Best air purifiers for 2020: Dyson, Coway, Molekule and more,” “Do air purifiers protect against COVID-19? What about wildfire smoke?” Harvard-CU Boulder Portable Air Cleaner Calcul Air purifiers with HEPA filters, such as the Honeywell HPA300 shown here, can capture particles that contain the coronavirus.
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