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Int. J. Environ. Res. Public Health 2010, 7(12), 4238-4249; doi:10.3390/ijerph7124238

Estimation of Uncertainty in Tracer Gas Measurement of Air Change Rates

Research Center for Sustainable Science and Engineering, Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1, Katahira, Sendai, Miyagi 980-8577, Japan
Department of Environmental Systems, Institute of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8563, Japan
Author to whom correspondence should be addressed.
Received: 16 November 2010 / Accepted: 14 December 2010 / Published: 16 December 2010
(This article belongs to the Special Issue Indoor Air Pollution and Human Health)
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Simple and economical measurement of air change rates can be achieved with a passive-type tracer gas doser and sampler. However, this is made more complex by the fact many buildings are not a single fully mixed zone. This means many measurements are required to obtain information on ventilation conditions. In this study, we evaluated the uncertainty of tracer gas measurement of air change rate in n completely mixed zones. A single measurement with one tracer gas could be used to simply estimate the air change rate when n = 2. Accurate air change rates could not be obtained for n ≥ 2 due to a lack of information. However, the proposed method can be used to estimate an air change rate with an accuracy of
Keywords: ventilation; tracer gas; indoor air; perfluorocarbon ventilation; tracer gas; indoor air; perfluorocarbon
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Iizuka, A.; Okuizumi, Y.; Yanagisawa, Y. Estimation of Uncertainty in Tracer Gas Measurement of Air Change Rates. Int. J. Environ. Res. Public Health 2010, 7, 4238-4249.

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