air filter

Throughout the certification process of air filters, the major technical characteristics are evaluating. Both theoretical models and experimental methods, proves some relationships between the parameters and the performance of product. In this article we present the statistical analysis of certified products according to EN ISO16890:2016. A sample of 1800 certified products by Eurovent Certita Certification is analysed to highlight products characteristics based on quantitative approach.

As the world trade field is expanding, international standard of air filter is urgently needed. At present,China is undergone its revising the national standards, therefore, the development of major air filterstandards between America and Europe is compared here. Diameter distribution of KCl aerosol used inASHRAE52.2 is similar with atmospheric dust, but research for test dust representing actual conditionis still needed. Concepts for electrostatic discharge between Europe and America are different, andclassification upon minimum life efficiency (MLE) is recommended.

This study aimed to investigate volatile organic compound (VOC) emission fluxes from a new air filtermedia and a used one. The emission tests from air filters were carried out by the small chambermethod and a new chamber method developed in this study. And the VOCs in an actual air conditioningunit were measured in order to confirm the emission from the air filter. The some VOCs emitted fromused air filter could be detected in the emission tests. The air filter medias emitted formaldehyde andother organic compounds, and airflow through filter media changed emission fluxes.

New laboratory test methods using different dusts have been developed for measuring and classifying air filters but could give very misleading results compared with filter behavior in an installation. The paper describes the differences between laboratory tests and performances in atmospheric air. It provides a basis for a better understanding of air filters and filter testing to meet IAQ problems and to reflect a filters' behavior "in service".