Abstract
In a field study of 302 residences, the indoor air contaminant concentrations associated with the use of unvented kerosene space heaters and gas cooking stoves were measured. For each residence, 2-week average NO 2 levels were recorded outdoors and in three rooms using diffusion-type passive monitors. Data were obtained on NO 2 sources, the level of use of these sources and on building characteristics from an initial questionnaire, a bi-weekly telephone interview, daily diaries and from assessors' records. The methodology employed in the field study is evaluated in terms of a multivariate model which predicts variations in NO 2 levels in the residences as a function of the existence and reported use of sources. The source use parameters were found to explain over 60 % of the variation in residential indoor NO 2 levels. The levels of specification needed for other independent variables (infiltration, removal rates, etc.) and the source use terms in the predictive model are presented and discussed.
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