Particles smaller than 10 microns can remain suspended in the air for up to 3 hours.
The size of viruses varies between 0.2 – 3 microns, and the sizes of bacteria vary between 1.5 – 3 microns.
However, bacteria and viruses cannot travel freely in the air. They hang in the air by attaching to the particles in the air and bio-aerosols that spread through the mouth.
For this reason, the size of viruses and bacteria becomes larger than 0.3 micron with the particle they are attached to and can be effectively held by HEPA filters.
As the Froumann team, we make and report your ambient air quality measurements on-site with the most advanced devices and help you select the correct Froumann Air Purification System.
HEPA filters obtained from glass wool have the feature of filtering particles, even small ones up to 0.3 microns.
Particles filter is used to catches large particles in order to protect HEPA filter.