Hint ≫ Chemistry ≫ Size
작을수록 안정된 유화상태를 유지한다
실내공기오염물질 크기과 침강시간
Type Microns (diameter) Time to Settle
Skin Flakes 20 - 50 5 seconds
Dust >10
Pollens 15-25
Mite Allergens 10-20 5 minutes
Common Spores 2-10
Bacteria 1-5
Cat Dander 0.5-1.5 10 hrs
Tobacco Smoke 0.1-1
Metal Fumes <1
Cell Debris 0.01-1
Viruses <0.1 10 days