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New ISO filter standard
Product News Monday, August 15, 2016: Freudenberg Filtration Technologies (Pty) Ltd
The new test standard ISO 16890 for filter testing and assessment is likely to replace EN 779 by the end of 2016, with a transition period of 18 months. This new method for the evaluation of air filter elements represents a paradigm shift. In future, filter efficiencies will be determined with regard to the particulate classes PM1, PM2,5 and PM10, which are also used as evaluation parameters by the WHO (World Health Organization) and environmental authorities.
Based on these benchmarks, users will in future be able to more precisely select filters according to their individual requirements.
ISO 16890 - the new group classification
According to new ISO standard filters are divided into four groups. A prerequisite for each group is that a filter captures at least 50 % of the appropriate particle size range. If a filter, for example, captures more than 50 % of PM1 particles, it will be grouped as an ISO ePM1 filter. The respective efficiency is then reported, rounded in 5 % increments.
Alongside fine dust filters, the new ISO standard also evaluates coarse dust filters as ISO coarse: that is, filters that capture less than 50 % PM10.