Part 3- In-duct UVGI
•Objective:
determine the effectiveness of in-duct UVGI on inactivating
Mycobacterium parafortuitum aerosolized
from the outdoor air intake
of the HVAC system
•Three
sampling locations: outdoor air duct, supply air duct and in the room with 2 BioSamplers in each location
•Three UV
lamps 20 inches in length were placed in the supply air duct 12 inches apart
•UV intensity-
5 inches from the bottom of the duct: 1.50 µW/cm2 (StDev. 0.20) and 19 inches from the
bottom of the duct: 1.13 µW/cm2 (StDev. 0.11)
•Distance from
UV lamps to supply air duct BioSamplers was 3.8 m