Germicidal / Biological Air Cleaning
Typical Particle Sizes
Plant Microbial /  Animal Mineral Combustion Products
0.01
0.1
1
10
100
1000
Diameter in μm
Higher Risk Respirable Particles
Visible to human Eye
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Spores
Mold
Pollen
Carbon Black
Viruses
Human Skin Cells
Bacteria
Droplet Nuclei
Coal Dust
Cement Dust
Asbestos
Paint Pigments
Tobacco Smoke
Auto Emissions
Oil Smoke
Fly Ash