Filter Efficiency Evaluation with JIS-11 Kanto Loam Test Powder —Standardization of Filter Testing in ISO / TC 142 / WG 3—

Abstract

Air filter efficiency testing methods have historically consisted of the volumetric, colorimetric, and particle counting methods. With the global expansion of the air filtration market, ununified test methods and definitions of filter efficiency has brought some confusion in the global market. In order to resolve this confusion, ISO / TC 142 / WG 3 was reinstalled in 2006 towards the standardization of general ventilation air filter test methods, and issued ISO / FDIS 21220. However, unfortunately it was rejected by the FDIS vote. The Japanese TC 142 mirror committee has been considering the possibilities of a particle diameter-based, fractional filter efficiency test method that employs JIS-11 test particles as an alternative to ISO / FDIS 21220. An overview of this project is introduced here.