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Biological Air Cleaning
Ultraviolet Germicidal Irradiation (UVGI)
•
Electromagnetic radiation
•
C-band ultraviolet; 254 nm
•
Damages DNA/RNA
•
Effectiveness is dose-
related
(intensity x time)
•
Dose varies by microbe
•
Designed for specific duty
•
Surface “kill” - Low intensity
•
On-the-fly “kill”
- high intensity (5-7x surface)
Most
susceptible
Least
susceptible
virus
vegetative
bacteria
mycobacteria
bacterial
spores
fungal spores