Distribution Of Residential Air Leakage: Implications For Health Consequences Of An Outdoor Toxic Release

Publication Type
Conference Proceedings
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Abstract

Reasonably airtight buildings can protect occupants from large-scale outdoor airborne releases. However, some houses are leaky, as air tightness tends to vary greatly in a housing stock. We modeled the health consequences if a single-family residential community were to "shelter-in-place," for two different models of a toxic release: (I) a simple Gaussian puff, and (II) a realistic simulation of outdoor transport and dispersion generated by the National Atmospheric Release Advisory Center. We predicted the health effects under two different assumptions: (1) every house has the same indoor-outdoor air-exchange rate, or (2) the houses have a lognormal distribution of air-exchange rates. The assumption that every house has the same air-exchange rate (at the median of the actual distribution) can lead to an under-prediction of the community area adversely affected by the release by a factor of 3 or more. The difference is largest if the dose-response relationship of the chemical is highly nonlinear.

Conference Name
Proceedings of The 10th International Conference on Indoor Air Quality and Climate - Indoor Air 2005
Volume
2(6)
Year of Conference
2005
Pagination
1729-1733
Publisher
Tsinghua University Press
Conference Location
Beijing, China
Custom 1
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