Comparison of the air change per hour measured over four seasons in the residential buildings of the urban, rural, and industrial areas of South Korea: K-IOP Study
Air infiltration, calcuated by air changes per hour (ACH) is a key factor in assessing the potential amount of air borne pollutants moving from outdoor into indoor spaces. We measured the natural ACH through fall, winter, spring, and summer (2 weeks/season), in 81 nonsmoking elderly houses located i...
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-04-01
|
| Series: | Environmental Advances |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666765723001229 |
| _version_ | 1827318525229793280 |
|---|---|
| author | Birhan Legese Gurmu Mingi Kim Chiyou Song Sangwoon Lee Yeonjin Kim Eunhwan Kim Yuri Choi Sanghwan Bae Ho-Hyun Kim Sungroul Kim |
| author_facet | Birhan Legese Gurmu Mingi Kim Chiyou Song Sangwoon Lee Yeonjin Kim Eunhwan Kim Yuri Choi Sanghwan Bae Ho-Hyun Kim Sungroul Kim |
| author_sort | Birhan Legese Gurmu |
| collection | DOAJ |
| description | Air infiltration, calcuated by air changes per hour (ACH) is a key factor in assessing the potential amount of air borne pollutants moving from outdoor into indoor spaces. We measured the natural ACH through fall, winter, spring, and summer (2 weeks/season), in 81 nonsmoking elderly houses located in urban (n = 29), industrial (n = 26) and rural (n = 26) areas from 2021 to 2022 consecutively. Indoor CO2 data measured at dawn (01:00 to 05:00 a.m.) over four season was used to estimate the ACH. Moreover, morning ACHs were also calculated from the CO2 level monitored in the morning, when the levels were dropped significantly with opening a window during fall, winter, and spring. The ACH at dawn over the four seasons ranged from 0.02 to 0.03,while that in the morning with opening a window was 0.2 to 0.3. Our multivariate regression models demonstrated that the difference in CO2 concentration during dawn was positively associated with the ACH change after adjusting for seasonality. In addition, after controlling for the study area, ACH was approximately 50 % higher during summer than during the other seasons (p < 0.05). This study elucidates the seasonal and regional distributions of ACH; a determination of these patterns may further contribute to future simulation or prediction studies assessing the associations among indoor air quality, activity patterns and ventilation practices among Korean elderly population. |
| first_indexed | 2024-03-08T21:46:58Z |
| format | Article |
| id | doaj.art-44fc91219bbd4cf398887be8256f773e |
| institution | Directory Open Access Journal |
| issn | 2666-7657 |
| language | English |
| last_indexed | 2024-04-25T00:03:32Z |
| publishDate | 2024-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Environmental Advances |
| spelling | doaj.art-44fc91219bbd4cf398887be8256f773e2024-03-14T06:16:27ZengElsevierEnvironmental Advances2666-76572024-04-0115100464Comparison of the air change per hour measured over four seasons in the residential buildings of the urban, rural, and industrial areas of South Korea: K-IOP StudyBirhan Legese Gurmu0Mingi Kim1Chiyou Song2Sangwoon Lee3Yeonjin Kim4Eunhwan Kim5Yuri Choi6Sanghwan Bae7Ho-Hyun Kim8Sungroul Kim9Department of Environmental Health Sciences, Soonchunhyang University, South KoreaDepartment of ICT Environmental Health System, Graduate School, Soonchunhyang University, South KoreaDepartment of ICT Environmental Health System, Graduate School, Soonchunhyang University, South KoreaDepartment of Environmental Health Sciences, Soonchunhyang University, South KoreaDepartment of ICT Environmental Health System, Graduate School, Soonchunhyang University, South KoreaDepartment of ICT Environmental Health System, Graduate School, Soonchunhyang University, South KoreaDepartment of Integrated Air Quality Analysis, Seoul Metropolitan Government Research Institute of Public Health and Environment, South KoreaKorea Institute of Civil Engineering and Building Technology, South KoreaDepartment of Nano-chemical, Biological, and Environmental Engineering, Seokyeong University, Seoul, South KoreaDepartment of Environmental Health Sciences, Soonchunhyang University, South Korea; Department of ICT Environmental Health System, Graduate School, Soonchunhyang University, South Korea; Corresponding author at: Department of Environmental Health Sciences, Soonchunhyang University, South KoreaAir infiltration, calcuated by air changes per hour (ACH) is a key factor in assessing the potential amount of air borne pollutants moving from outdoor into indoor spaces. We measured the natural ACH through fall, winter, spring, and summer (2 weeks/season), in 81 nonsmoking elderly houses located in urban (n = 29), industrial (n = 26) and rural (n = 26) areas from 2021 to 2022 consecutively. Indoor CO2 data measured at dawn (01:00 to 05:00 a.m.) over four season was used to estimate the ACH. Moreover, morning ACHs were also calculated from the CO2 level monitored in the morning, when the levels were dropped significantly with opening a window during fall, winter, and spring. The ACH at dawn over the four seasons ranged from 0.02 to 0.03,while that in the morning with opening a window was 0.2 to 0.3. Our multivariate regression models demonstrated that the difference in CO2 concentration during dawn was positively associated with the ACH change after adjusting for seasonality. In addition, after controlling for the study area, ACH was approximately 50 % higher during summer than during the other seasons (p < 0.05). This study elucidates the seasonal and regional distributions of ACH; a determination of these patterns may further contribute to future simulation or prediction studies assessing the associations among indoor air quality, activity patterns and ventilation practices among Korean elderly population.http://www.sciencedirect.com/science/article/pii/S2666765723001229InfiltrationAir change rateIndoor air |
| spellingShingle | Birhan Legese Gurmu Mingi Kim Chiyou Song Sangwoon Lee Yeonjin Kim Eunhwan Kim Yuri Choi Sanghwan Bae Ho-Hyun Kim Sungroul Kim Comparison of the air change per hour measured over four seasons in the residential buildings of the urban, rural, and industrial areas of South Korea: K-IOP Study Environmental Advances Infiltration Air change rate Indoor air |
| title | Comparison of the air change per hour measured over four seasons in the residential buildings of the urban, rural, and industrial areas of South Korea: K-IOP Study |
| title_full | Comparison of the air change per hour measured over four seasons in the residential buildings of the urban, rural, and industrial areas of South Korea: K-IOP Study |
| title_fullStr | Comparison of the air change per hour measured over four seasons in the residential buildings of the urban, rural, and industrial areas of South Korea: K-IOP Study |
| title_full_unstemmed | Comparison of the air change per hour measured over four seasons in the residential buildings of the urban, rural, and industrial areas of South Korea: K-IOP Study |
| title_short | Comparison of the air change per hour measured over four seasons in the residential buildings of the urban, rural, and industrial areas of South Korea: K-IOP Study |
| title_sort | comparison of the air change per hour measured over four seasons in the residential buildings of the urban rural and industrial areas of south korea k iop study |
| topic | Infiltration Air change rate Indoor air |
| url | http://www.sciencedirect.com/science/article/pii/S2666765723001229 |
| work_keys_str_mv | AT birhanlegesegurmu comparisonoftheairchangeperhourmeasuredoverfourseasonsintheresidentialbuildingsoftheurbanruralandindustrialareasofsouthkoreakiopstudy AT mingikim comparisonoftheairchangeperhourmeasuredoverfourseasonsintheresidentialbuildingsoftheurbanruralandindustrialareasofsouthkoreakiopstudy AT chiyousong comparisonoftheairchangeperhourmeasuredoverfourseasonsintheresidentialbuildingsoftheurbanruralandindustrialareasofsouthkoreakiopstudy AT sangwoonlee comparisonoftheairchangeperhourmeasuredoverfourseasonsintheresidentialbuildingsoftheurbanruralandindustrialareasofsouthkoreakiopstudy AT yeonjinkim comparisonoftheairchangeperhourmeasuredoverfourseasonsintheresidentialbuildingsoftheurbanruralandindustrialareasofsouthkoreakiopstudy AT eunhwankim comparisonoftheairchangeperhourmeasuredoverfourseasonsintheresidentialbuildingsoftheurbanruralandindustrialareasofsouthkoreakiopstudy AT yurichoi comparisonoftheairchangeperhourmeasuredoverfourseasonsintheresidentialbuildingsoftheurbanruralandindustrialareasofsouthkoreakiopstudy AT sanghwanbae comparisonoftheairchangeperhourmeasuredoverfourseasonsintheresidentialbuildingsoftheurbanruralandindustrialareasofsouthkoreakiopstudy AT hohyunkim comparisonoftheairchangeperhourmeasuredoverfourseasonsintheresidentialbuildingsoftheurbanruralandindustrialareasofsouthkoreakiopstudy AT sungroulkim comparisonoftheairchangeperhourmeasuredoverfourseasonsintheresidentialbuildingsoftheurbanruralandindustrialareasofsouthkoreakiopstudy |