Ultraviolet germicidal irradiation inactivation of airborne fungal spores and bacteria in upper-room air and HVAC in-duct configurations

In that paper, the efficiency of ultraviolet germicidal irridiation (UVGI) to inactivate airborne fungal spores and bacterial vegetative cells has been evaluated under three configurations : intrinsic, upper-room air and in-duct. Experiments were carried out in a pilot-scale chamber with 4 corner UV lamps, in a full-scale room fitted with a UVGI system, and in the supply air duct of a heating ventilation and air-conditioning (HVAC) system. Results are presented.