For more than 40 years ultraviolet germicidal irradiation (UVGI) has proved to be lethal to a variety of microorganisms, including mycobacterium. Applications include “upper-air” room irradiation, portable or wall-mounted room air units, and some duct installations. UV-C irradiation (germicidal UV, used for air disinfection, is in the “C” band wavelength range) has, in the past, demonstrated poor efficacy in >60% relative humidity airstreams and/or when dust accumulates on the lamps. However, notable advancement in UV-clamp and power supply technology may overcome these drawbacks and thus provide promise of using UV-C as a supplemental means of biological control in HVAC equipment.
This study details the results of using these lamps in the air-handling units (downstream of cooling coils) of a four-story, 286,000 ft 2 office building during the summer in a hot and humid climate. Air, bulk, and water samples were taken on two floors (a study floor and a control floor) prior to and following UV-C installation.
Preliminary results indicate positive effects in controlling microorganisms within the localized area of the UV-C installation.
Authors: Richard Shaughnessy, Ph.D., Estelle Levetin, Ph.D., Christine Rogers, Ph.D.
Citation: IAQ and Energy 98 Using ASHRAE Standards 62 and 90.1 Conference Papers
Keywords: October, Louisiana, 1998
Citation: IAQ Conference: IAQ 98
Product Details
- Published:
- 1998
- File Size:
- 1 file , 350 KB
- Product Code(s):
- D-8131
