Aerosol and biological sampling of a ventilation fan-bank modified with ultraviolet germicidal irradiation and improved filter holders.
Moyer-ES; Miller-WE; Commodore-MA; Coffey-CC; Hayes-JL; Fotta-SA; Sims-G
Indoor Built Environ 2010 Apr; 19(2):230-238
Two independent modifications were made to one of two identical side-by-side filter banks for a large air-handler: ( 1) new filter holders, intended to provide a better seal and ( 2) ultraviolet germicidal irradiation (UVGI) lamps, intended to control microbiological growth. Total system efficiency testing with optical particle counters was performed to determine the effectiveness of the new filter holders. The efficacy of the UVGI lamps was determined through biological surface and air sampling. Results indicated that the side with the new filter holders was about 3.4% more efficient per year during the 22-month sampling period, whereas the coil chamber with the UVGI lamps had less biological contamination than the corresponding control chamber for over 75% of the sampling days.
Air-filters; Air-flow; Air-monitoring; Air-quality-control; Air-quality-measurement; Air-quality-monitoring; Air-sampling-techniques; Air-treatment; Biological-effects; Biological-monitoring; Control-equipment; Control-methods; Control-technology; Environmental-control; Exposure-assessment; Exposure-levels; Exposure-methods; Filter-materials; Inhalation-studies; Microbiology; Microorganisms; Particle-counters; Particulate-dust; Particulates; Particulate-sampling-methods; Physiological-response; Pulmonary-system; Risk-factors; Statistical-analysis; Testing-equipment; Ventilation-systems;
Author Keywords: Filtration; Indoor environment; Aerosol particles; Control technology; Particle counter
William E. Miller, National Institute for Occupational Safety and Health, Division of Respiratory Disease Studies, 1095 Willowdale Road, Morgantown, WV 26505-2888
Healthcare and Social Assistance
Indoor and Built Environment