Effect of interior door position on room-to-room differences in residential pollutant concentrations after short-term releases |
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Authors: | Andrea R. Ferro Neil E. Klepeis Wayne R. Ott William W. Nazaroff Lynn M. Hildemann Paul Switzer |
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Affiliation: | 1. Department of Building, School of Design and Environment, National University of Singapore, Singapore 117566, Singapore;2. Faculty of Built Environment, University of New South Wales, Sydney, NSW 2052, Australia |
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Abstract: | Residential interior door positions influence the pollutant concentrations that result from short-term indoor sources, such as cigarettes, candles, and incense. To elucidate this influence, we reviewed past studies and conducted new experiments in three residences: a single-story 714 m3 ranch-style house, a 510 m3 two-story split-level house, and a 200 m3 two-story house. During the experiments, we released sulfur hexafluoride or carbon monoxide tracer gas over short periods (≤30 min) and measured concentrations in the source room and at least one other (receptor) room for various interior door opening positions. We found that closing a door between rooms effectively prevented transport of air pollutants, reducing the average concentration in the receptor room relative to the source room by 57–100% over exposure periods of 1–8 h. When intervening doors were partially or fully open, the reduction in average concentrations ranged from 3% to 99%, varying as a function of door opening width and the distance between source and receptor rooms. |
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