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CISDOC database

Document ID (ISN)109016
CIS number 09-188
ISSN - Serial title 1545-9624 - Journal of Occupational and Environmental Hygiene
Year 2007
Convention or series no.
Author(s) Rudnick S.N., First M.W.
Title Fundamental factors affecting upper-room ultraviolet germicidal irradiation - Part II. Predicting effectiveness
Bibliographic information May 2007, Vol.4, No.5, p.352-362. Illus. 22 ref.
Abstract Compared with increasing outdoor air ventilation rate, upper-room ultraviolet germicidal irradiation (UVGI) is an attractive technology for lowering the indoor concentration of airborne microorganisms and thereby reducing the risk of airborne transmission of disease. With relatively modest vertical air circulation, most of the air in a room can be irradiated in a brief time period without noise or significant power consumption. The hypothesis tested in this study is that the efficacy of upper-room UVGI to inactivate or kill airborne infectious microorganisms can be determined from an index of UVGI effectiveness, a dimensionless parameter designed to characterize vertical air circulation, the amount of UVGI provided, and their interaction. This index was found to correlate well with experimental measurements made in a laboratory chamber simulating a hospital room. See also CIS 09-000, ISN 4.
Descriptors (primary) ultraviolet radiation; microorganisms; prediction; hospitals; infection control
Descriptors (secondary) pathogenic bacteria; viruses; test laboratories; description of technique; ventilation systems; evaluation of technique; disinfection of air
Document type D - Periodical articles
Country / State or ProvinceUSA
Subject(s) Commerce, services, offices
Broad subject area(s) Biological hazards
Physical hazards
Browse category(ies) Non-ionizing radiation
Health care services