Yifei Zhang1,2, Erbao Guo This email address is being protected from spambots. You need JavaScript enabled to view it.1,2, Haowei Hu1,2, Hanxiao Wang3, Xingcheng Liu4 

1 Advanced Technology Institute of Green Building Research of Anhui Province, Anhui Jianzhu University, Hefei 230601, China
2 Key Laboratory of Indoor Thermal and Humid Environment, Anhui Jianzhu University, Hefei 230601, China
3 Anhui Beacon Electric Co., Ltd., Hefei 230088, China
4 CISDI Shanghai Engineering Co., Ltd., Shanghai 200940, China

Received: May 1, 2022
Revised: June 18, 2022
Accepted: August 10, 2022

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

Download Citation: ||https://doi.org/10.4209/aaqr.220184  

  • Download: PDF

Cite this article:

Zhang, Y., Guo, E., Hu, H., Wang, H., Liu, X. (2022). Experimental Study on PM2.5 Purification Characteristics of Different Filter Units in Enclosed Environments. Aerosol Air Qual. Res. https://doi.org/10.4209/aaqr.220184


  • We designed a specific air cleaner that can replace different filter units.
  • Different filter units can remove fine particles effectively.
  • PM2.5 purification characteristics of different filter units were provided.


Many epidemiological studies have shown that long-term exposure to high PM2.5 concentrations can significantly increase the morbidity and mortality of different diseases. Air cleaners are effective in removing PM2.5. In the present research, different filter units were tested to determine their PM2.5 filtration efficiency. The filter face velocity was adjusted to 50%, 75%, 100%, 125%, and 150% of the corresponding rated airflow. The single-pass efficiencies, resistances, and cleaning efficiencies were simultaneously measured on every filter. In order to determine the clean air delivery rate (CADR) and cleaning energy efficiency (CEE) of different filter units, we designed a specific air cleaner that can replace different filter units in the test chamber. Our results showed that different filter units can effectively remove PM2.5. The filtration efficiencies of electrostatic structure precipitators (ESP) and intense field dielectric (IFD) were close those of the sub-high efficiency glass fiber filter. In this case, filtration efficiency decreased when wind speed increased, whereas that of the fiber filter did not . Even when cleaners with different filter units were able to quickly remove fine particles, the highest CADR and CEE values were obtained when the IFD cleaner was used. In contrast, medium efficiency glass fiber cleaners displayed the smallest CADR and CEE values. The CADR and CEE values of the medium efficiency glass fiber cleaner were about 48.3% and 51.4% that of the IFD cleaner. The present study provides relevant data that will be useful in pandemic prevention and control in order to reduce the risk of infection in enclosed environments.

Keywords: PM2.5, Filter units, Single-pass efficiency, Clean air delivery rate, Cleaning energy efficiency

Share this article with your colleagues 


Subscribe to our Newsletter 

Aerosol and Air Quality Research has published over 2,000 peer-reviewed articles. Enter your email address to receive latest updates and research articles to your inbox every second week.

Aerosol and Air Quality Research (AAQR) is an independently-run non-profit journal that promotes submissions of high-quality research and strives to be one of the leading aerosol and air quality open-access journals in the world. We use cookies on this website to personalize content to improve your user experience and analyze our traffic. By using this site you agree to its use of cookies.