Title Improvement of Airtightness and Blocking Performance of PM2.5 Inflow in Elementary School Classrooms Through Window Remodeling
Authors 이주원(Lee, Joowon) ; 강경모(Kang, Kyungmo) ; 김태연(Kim, Taeyeon)
DOI https://doi.org/10.5659/JAIK.2023.39.6.185
Page pp.185-192
ISSN 2733-6247
Keywords School; Airtightness performance; Window Remodeling; PM2.5; Penetration factor; Blower door test
Abstract When classrooms are sealed shut, the level of PM2.5 infiltration is largely influenced by the effectiveness of airtightness. This study aims to evaluate the airtightness performance by remodeling the windows on the outdoor side, a primary source of PM2.5 inflow, in four classrooms in Korea. These classrooms, with a floor area of 65.6m2 and a volume of 170.6m3, are located adjacent to the same corridor. To evaluate airtightness performance, the main methods utilized were the Blower door test and the calculation of penetration factors through indoor and outdoor measurements of PM2.5 and CO2. The results demonstrated that, on average across the four classrooms, the ACH50 and ELA, calculated using the Blower door test, decreased by 5.8% and 10.1%, respectively. Additionally the average penetration factor for the four classrooms decreased by 14.6%. Furthermore, continuous monitoring of PM2.5 in the classroom with the weakest airtightness performance revealed an impressive 38.8% decrease in the I/O ratio.