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Open AccessArticle

Effect of Flow Rate and Filter Efficiency on Indoor PM2.5 in Ventilation and Filtration Control

1
Hanil Mechanical and Electrical Consultants Ltd., Seoul 07271, Korea
2
Department of Architecture, College of Engineering, Seoul National University, Seoul 07271, Korea
*
Author to whom correspondence should be addressed.
Atmosphere 2020, 11(10), 1061; https://doi.org/10.3390/atmos11101061
Received: 21 September 2020 / Accepted: 29 September 2020 / Published: 5 October 2020
(This article belongs to the Section Air Quality)
Ventilation and filtration control play a critical role in determining indoor PM2.5 (particles less than 2.5 μm in aerodynamic diameter) concentrations of outdoor or indoor origin in residential environments. The objective of this study was to investigate the combined effects of flow rates and filter efficiency on indoor PM2.5 concentrations of residential buildings in Seoul, Korea. Using a particle model based on a mass–balance equation, parametric analysis was performed to examine indoor PM2.5 concentrations according to flow rates and filter efficiency under a wide range of outdoor concentrations and indoor generations. Results showed that ventilation control equipped with a medium–efficiency filter was as effective as that with a high-efficiency filter under normal outdoor concentration and high indoor generation rate conditions. It is not recommended to apply a low-efficiency filter because indoor concentration increases rapidly as outdoor PM2.5 increases when ventilation flow rate is high. For filtration control, it is important to increase both flow rate and filter efficiency in order to improve indoor PM2.5 concentration. View Full-Text
Keywords: PM2.5; ventilation; filtration; flow rate; filter efficiency; particle model PM2.5; ventilation; filtration; flow rate; filter efficiency; particle model
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Kim, J.-H.; Yeo, M.-S. Effect of Flow Rate and Filter Efficiency on Indoor PM2.5 in Ventilation and Filtration Control. Atmosphere 2020, 11, 1061.

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