Explanation of test method for medium and coarse efficiency air filter units

Abstract

Based on the international standard ISO16890 series established in 2016, JIS B 9908, the JIS standard for general ventilation air filters, was established in 2019. The concept of particulate matter efficiency J-ePMx was newly introduced. Market confusion is expected because the filter category has changed significantly. This section explains the contents of the JIS standard, the background and problems regarding to the standard change. Also, the transition of the JIS standard and the classification according to the 2019 edition, comparison with existing overseas standards, current application status and future issues.