ILO Home
Go to the home page
Site map | Contact us Français | Español

CISDOC database

Document ID (ISN)23122
CIS number 75-1112
ISSN - Serial title 0303-8408 - SPM - Sozial- und Präventivmedizin - Social and Preventive Medicine - Médecine sociale et préventive
Year 1974
Convention or series no.
Author(s) Wanner H.U., Wirz M.
Title Health aspects of air humidification in air-conditioning systems
Original title Hygienische Aspekte der Luftbefeuchtung in Klimaanlagen [in German]
Bibliographic information Sep.-Dec. 1974, Vol.19, No.5-6, p.351-356. Illus. 15 ref.
Abstract Water was taken over a period of several weeks from 4 air washers, and analysed to determine increase in microbial contamination. Regular adjunction of disinfectants (based on chlorine, aldehydes and surfactants) merely slowed up the proliferation of micro-organisms. The odour of the disinfectants invaded the premises, causing annoyance and discomfort. Far the best results were obtained by installing quartz lamps for UV irradiation of the water between the circulation pump and the air washers. Even using this method, periodic cleaning of the washer chamber (repeated at least every 2-3 weeks) is indispensable. The most effective means of preventing room air contamination by micro-organisms is to install filters at the air outlets.
Descriptors (primary) air conditioning; microbial pollution; air humidification; pollution control
Descriptors (secondary) air purification; ultraviolet radiation; odour pollution; disinfection of air; preventive maintenance; microorganisms
Document type -
Subject(s) Environmental pollution
Broad subject area(s)
Browse category(ies) Air pollution
Pollution control
Environmental pollution
Heating and air conditioning