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Indoor/Outdoor Relationships of Airborne Particles under Controlled Pressure Difference across the Building Envelope in Korean Multifamily Apartments

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  • Dong Hee Choi

    (Department of Architectural Engineering, College of Engineering, Kyungil University, Kyungsan 38428, Korea)

  • Dong Hwa Kang

    (Department of Architectural Engineering, College of Urban Sciences, University of Seoul, Seoul 02504, Korea)

Abstract

This study investigates indoor/outdoor relationships of airborne particles under controlled pressure difference across the building envelope in Korean multifamily apartments. On-site field experiments on 14 apartment housing units located in urban areas in Korea are conducted to measure the indoor/outdoor ratios of number concentrations of size-resolved particles (0.3–0.5, 0.5–1.0, 1.0–3.0, 3.0–5.0, 5.0–10.0, >10.0 μm). To set identical pressure difference conditions across the envelope of each housing unit for better comparison of I/O ratio results, and to examine the effect of pressure difference on the I/O relations, indoor–outdoor pressure difference was controlled at 10, 30, and 50 Pa using a blower door depressurization procedure. Simultaneously, the air leakage characteristics of housing units are measured using the typical blower door pressurization-depressurization test method to correlate air leakage data and I/O ratios. As expected, moderately airtight housing units (ACH 50 ≤ 4.4) show lower I/O ratios than average leaky housing units (ACH 50 > 4.4); still, the averaged I/O ratios of finer sized particles (0.3–0.5, 0.5–1.0, and 1.0–3.0 μm) in the moderately airtight housing units were 0.75, 0.59, and 0.61 at an I-O pressure difference of 50 Pa, and 0.62, 0.51, and 0.49 at 10 Pa. The study indicates that indoor residents in moderately airtight Korean multifamily housing units with relatively small envelope area can still be exposed to high concentrations of outdoor originated fine particles.

Suggested Citation

  • Dong Hee Choi & Dong Hwa Kang, 2018. "Indoor/Outdoor Relationships of Airborne Particles under Controlled Pressure Difference across the Building Envelope in Korean Multifamily Apartments," Sustainability, MDPI, vol. 10(11), pages 1-14, November.
    • Handle: RePEc:gam:jsusta:v:10:y:2018:i:11:p:4074-:d:181041
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    References listed on IDEAS

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    1. Hong, Won-Kee & Kim, Jin-Min & Park, Seon-Chee & Lee, Seung-Geun & Kim, Seung-Il & Yoon, Ki-Joon & Kim, Hee-Cheul & Kim, Jeong Tai, 2010. "A new apartment construction technology with effective CO2 emission reduction capabilities," Energy, Elsevier, vol. 35(6), pages 2639-2646.
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    Cited by:

    1. Chang-Jin Ma & Gong-Unn Kang, 2020. "Air Quality Variation in Wuhan, Daegu, and Tokyo during the Explosive Outbreak of COVID-19 and Its Health Effects," IJERPH, MDPI, vol. 17(11), pages 1-12, June.
    2. Bo Ram Park & Ye Seul Eom & Dong Hee Choi & Dong Hwa Kang, 2021. "Estimation of Outdoor PM 2.5 Infiltration into Multifamily Homes Depending on Building Characteristics Using Regression Models," Sustainability, MDPI, vol. 13(10), pages 1-14, May.
    3. Murtaza Mohammadi & John Calautit, 2022. "Quantifying the Transmission of Outdoor Pollutants into the Indoor Environment and Vice Versa—Review of Influencing Factors, Methods, Challenges and Future Direction," Sustainability, MDPI, vol. 14(17), pages 1-27, August.
    4. Ye Seul Eom & Bo Ram Park & Hee Won Shin & Dong Hwa Kang, 2021. "Evaluation of Outdoor Particle Infiltration into Classrooms Considering Air Leakage and Other Building Characteristics in Korean Schools," Sustainability, MDPI, vol. 13(13), pages 1-18, July.

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