Air purifiers with HEPA filter efficiently catch particles that the size (and much more compact than) the virus leads to COVID-19, so the solution is yes, even in concept. Simply speaking, the CDC currently admits the virus may spread through the atmosphere. That is a significant modification of its former position: this direct person-to-person contact, such as via bigger respiratory droplets which don’t travel much or linger in the atmosphere, was the primary vector, which airborne (a.k.a. aerosol) transmission wasn’t a vector, interval. And it is worth noting that on September 18, the CDC released –and three days afterward retracted, citing mistakes in an internal inspection procedure –a variant of its rule that said that inhalation of aerosolized respiratory droplets” is regarded as the primary way that the virus spreads.”
It falls directly within the particle-size array that HEPA filters catch with exceptional efficacy: 0.01 micron (10 nanometers) and over. Many media outlets have wrongly said that HEPA filters do not filter under 0.3 microns and consequently couldn’t catch airborne coronaviruses. That is wrong. This NASA analysis of HEPA filtration is very technical. Nonetheless, the chart on the page and the previous paragraph do a fantastic job describing why HEPA filters are now most efficient–nearly 100 percent at 0.01 micron–in catching ultrafine particles under the 0.3-micron HEPA test benchmark. One of the best ones – The Air Doctor air purifier, uses an even much more effective UltraHEPA filter combined with dual Carbon and can eliminate particles as small as .003 microns in size.
This implies HEPA purifiers would economically capture viruses (and some other aerosolized droplets of mucus and saliva which contain them) that are attracted in their filters. In its guidance on cleaning and disinfecting homes throughout the ordeal, the CDC admits as much: “When used correctly, air purifiers can help lessen airborne contaminants, such as viruses, within a house or restricted space.”
What is less clear is if a HEPA purifier could catch the virus before the purpose of inhalation. If you are sitting next to somebody with COVID-19, by way of instance, an air conditioner to the far side of this area is not likely to protect you satisfactorily. That raises another unanswered question concerning how successful an air conditioner may be: What degree of vulnerability to this virus causes a disease to start with? We’re following this subject carefully, and we value our readers’ continuing support in helping us preserve accurate, current details.
However, even if you opt to use an air conditioner as a protective measure, we advise that you also continue to carefully adhere to the CDC’s other long-standing information, such as social distancing, sporting a face-covering outside, washing your hands regularly, and treating often touched surfaces using disinfectants. Since the CDC writes: “The very best way to avoid illness is to prevent being vulnerable to the virus.”