Analyzing a Database of Residential Air Leakage in the United States

TitleAnalyzing a Database of Residential Air Leakage in the United States
Publication TypeJournal Article
Year of Publication2005
AuthorsWanyu R Chan, William W Nazaroff, Phillip N Price, Michael D Sohn, Ashok J Gadgil
JournalAtmospheric Environment
Volume39
Issue19
Pagination3445-3455
Date Published06/2005
ISSN13522310
Keywordsair leakage, blower door, fan pressurization measurements, infiltration
Abstract

We analyzed more than 70,000 air leakage measurements in houses across the United States to relate leakage area—the effective size of all penetrations of the building shell—to readily available building characteristics such as building size, year built, geographic region, and various construction characteristics. After adjusting for the lackof statisticalrepresentativeness of the data, we found that the distribution of leakage area normalized by floor area is approximately lognormal. Based on a classification tree analysis, year built and floor area are the two most significant predictors of leakage area: older and smaller houses tend to have higher normalized leakage areas than newer and larger ones.Multivariate regressions of normalized leakage are presented with respect to these two factors for three house classifications: low-income households, energy program houses, and conventional houses. We demonstrate a method of applying the regression model to housing characteristics from the American Housing Survey to derive a leakage-area distribution for all single-family houses in the US. The air exchange rates implied by these estimates agree reasonably well with published measurements.

DOI10.1016/j.atmosenv.2005.01.062
Short TitleAtmospheric Environment
Refereed DesignationRefereed