Air Leakage of US Homes: Regression Analysis and Improvements from Retrofit

Air Leakage of US Homes: Regression Analysis and Improvements from Retrofit

TitleAir Leakage of US Homes: Regression Analysis and Improvements from Retrofit
Publication TypeReport
Year of Publication2012
AuthorsWanyu R Chan, Jeffrey Joh, Max H Sherman
Date Published08/2012
Keywordsair infiltration, blower door, fan pressurization measurements, retrofit, weatherization
Abstract

LBNL Residential Diagnostics Database (ResDB) contains blower door measurements and other diagnostic test results of homes in United States. Of these, approximately 134,000 single-family detached homes have sufficient information for the analysis of air leakage in relation to a number of housing characteristics. We performed regression analysis to consider the correlation between normalized leakage and a number of explanatory variables: IECC climate zone, floor area, height, year built, foundation type, duct location, and other characteristics. The regression model explains 68% of the observed variability in normalized leakage. ResDB also contains the before and after retrofit air leakage measurements of approximately 23,000 homes that participated in weatherization assistant programs (WAPs) or residential energy efficiency programs. The two types of programs achieve rather similar reductions in normalized leakage: 30% for WAPs and 20% for other energy programs.

LBNL Report Number

LBNL-5966E