Tag respirators

COVID-19, Face Masks and Respirators for COVID-19

How to Deal with Respirator Exhaust Valves

An objection to the use of industrial-type respirators for protection against COVID-19 (as opposed to, for example, the dusts for which they are designed) is that the user exhales through an exhaust valve that offers little or no protection to…

Bill Levinson
August 5, 2020

COVID-19, Face Masks and Respirators for COVID-19

Yes, Respirators Stop Submicron Particles

People argue that respirators and face masks are not effective against COVID-19 because the virus is much smaller than the 0.3 micron challenge particles against which respirators are tested. They compare the respirator to “trying to stop mosquitoes with a…

Bill Levinson
August 4, 2020