Relationship between indoor/outdoor concentrations of particles : a critical review

He, Congrong & Morawska, Lidia (2003) Relationship between indoor/outdoor concentrations of particles : a critical review. In Wai, T., Sekhar, C., & Cheong, D. (Eds.) Proceedings of 7th International Conference Healthy Buildings, Stallion Press, National University of Singapore, Singapore, pp. 212-218.


The relationship between indoor and outdoor concentration levels of particles in the absence and in the presence of indoor sources has been attracting an increasing level of attention. Understanding of the relationship and the mechanisms driving it, as well as the ability to quantify it, are of importance for assessment of source contribution, assessment of human exposure and for control and management of particles. It became particularly important to address this topic when evidence came from epidemiological studies on the close association between outdoor concentration levels of particles and health effects, yet with many studies showing that indoor concentrations could be significantly higher than those outdoors. This paper presents a summary of an extensive literature review on this topic conducted with an aim to identify general trends in relation to the I/O relationship emerging from studies conducted worldwide. The review considered separately a larger body of papers published on PM10, PM2.5, as well as the smaller database on particle number and number or volume size distribution. A specific focus of this paper is on naturally ventilated houses. The conclusion from the review is that despite the multiplicity of factors that play role in affecting the relationship, there are clear trends emerging in relation to the I/O relationship for particle mass concentration, enabling more general predictions to be made about the relationship. However, more research is still needed on particle number concentration and size distribution.

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ID Code: 25372
Item Type: Conference Paper
Refereed: Yes
Additional URLs:
ISBN: 9810499744
Subjects: Australian and New Zealand Standard Research Classification > ENVIRONMENTAL SCIENCES (050000) > ENVIRONMENTAL SCIENCE AND MANAGEMENT (050200) > Environmental Monitoring (050206)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2003 [please consult the authors]
Deposited On: 17 Jun 2009 15:09
Last Modified: 29 Feb 2012 13:00

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