As a result of the current environmental conditions, we face the presence of suspended and invisible microparticles every time we breathe. The elevated level of air pollution inevitably raises the amount of chemical, physical and biological pollutants inside buildings.
The air quality depends on the amount of suspended particles it contains. Fine or coarse particles can linger in the air for multiple hours, and can carry allergens and dust, but also active viruses (ie. Covid-19).