The International Organization for Standardization (ISO) has created a new global standard, the ISO16890, which defines the classification and test procedures for air filters used in general ventilation systems.
The standard defines the requirements for particle filters and describes both the methods and the test bench for measuring filter performance.
Comparative guidelines for EN 779:2012 and ISO 16890. Under ISO 16890:2017, filters are divided into 4 specific classes, while under EN 779:2012, they were divided into 3 efficiency classes: for coarse (C), medium (M) or fine (F) particles.