Blackwell Publishing Journal Backfiles 1879-2005
Architecture, Civil Engineering, Surveying
Abstract Building characteristics of dwelling units in the metropolitan Boston area were statistically sorted on the basis of observed associations between the variables. First, associations between categories of house characteristics were determined by cross-table analyses with a pair-wise chi-square test. The key characteristics, which have a significant relationship with many other characteristics, were used to classify the dwelling units into several groups. Two key characteristics, i.e. building type and size of building, were determined. Houses were divided into three groups: single-unit building, small multi-unit (2 to 4 units) building, and large multi-unit (5+ units) building. The building type was not associated with indoor source, but was significantly associated with volume of dwelling unit, air exchange rate, and indoor and outdoor NO2 concentrations. Lower airflow, smaller volume units, and higher outdoor NC2 concentrations, in combination with other factors, result in higher indoor NO2 concentrations in multi-dwelling residential units (apartments and condominiums).
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