*100 nm -- Maximimum particle size that can fit through a surgical mask *120 nm -- Maximimum particle size that can fit through a ULPA filter[1] |
*100 nm -- Maximum particle size that can fit through a surgical mask *120 nm -- Maximum particle size that can fit through a ULPA filter[1] |
*300 nm -- Maximimum particle size that can fit through a HEPA filter |
*300 nm -- Maximum particle size that can fit through a HEPA filter |