ID = 52 
Title = Identification of air pollution sources in office buildings using the field and laboratory emission cell. 
Abstract = Measures to reduce the concentration of air pollution in existing buildings need to be based on knowledge about the relative importance of different sources. In this context, it is of importance that the significant indoor air pollution sources can be identified and that the source strength can be quantified. Characterization of the indoor emission of volatile organic compounds (VOCs) based only on chemical analysis of the indoor air may give poor information about the relative importance of different sources. The determination of the origin of the identified air pollutants has to be based on predetermined knowledge about the relevant sources and their emission characteristics. 

Building materials are often found among the major air pollution sources in buildings. One method to obtain details about the emission from materials in buildings may be based on material samples taken from the building and brought to a laboratory, where the evaluation can he supported by the use of emission test chambers. 

This paper presents a methodology for detailed field studies of the emission from building materials in existing buildings by the use of a portable micro-scale emission test chamber. The Field and laboratory Emission Cell (FLEC) provides the possibility of emission testing in the field, without damaging the building by collection and removal of material samples. The method is based on assessment of emission factors for the potential air pollution sources, one by one, in a room. The intention is to gain detailed information about the importance of different sources by comparing the FLEC results to VOC measurements in room air and outdoor air. The aim of the present study is to investigate the feasibility of the use of FLECs for source identification and to investigate the influence of the parameters time and specific ventilation rate in order to optimize the method. The work summarized in this paper was carried out as a part of the European Audit Project. 

Location = Healthy Building 95 page 1353-1358 
Reference type = Proceeding (Conference) 
Author = Ekberg,L,E. Gunnarsen,L. Knutti,R. Haas,J. 
Company or Institute = 
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Last updated 1997-01-18