Journal of Korean Institute of Architectural Sustainable Environment and Building SystemsISSN:1976-6483(Print) 2586-0666(Online)한국건축친환경설비학회

Blower door tests were carried out for two weeks to measure infiltration in two apartment houses located in Sejong, Korea. Preliminary measurement was carried out to investigate infiltration routes of the households for one week. In the main measurement, infiltration rates through the infiltration routes were measured as the pressure difference between indoor air and outdoor air was changed. Six sets of measurements were carried out and the measurement data were used to estimate flow coefficients (C) and pressure exponents (n) of all infiltration routes. To investigate feasibility of the analysis method, the linear regression method and the iterative method were used. Through the feasibility study, the criteria to determine whether to stop or continue the calculation process were found. The criteria is that R2 of the regression model of each case should be bigger than 0.9 and the pressure exponents (n) of the regression model for the previous blower door test case should be smaller than or equal to that of the following case. Using the criteria found in the feasibility study, the infiltration analysis was carried out which uses iterative approach to find sets of flow coefficients and pressure exponent to make the average R² value for all cases maximized. As a result of infiltration analysis, it was observed that the calculated pressure exponents of all regression model for a household was same.