Filter Classes
The four-tier group classification measures fine dust with a diameter of less than 10 µm, 2.5 µm, or 1 µm. The dust-particle sizes determine which of the four ISO 16890 group classifications (ePM1, ePM2.5, ePM10, and course dust) the filters fall under. The “e” in the group name stands for “efficiency”. “PM” stands for “particulate matter.” A prerequisite for each group is that a filter captures at least 50 % of the appropriate fine-dust particle size. For example: If a filter from group ePM1 is tested, it must capture at least half of the PM1 contaminants. If a filter captures less than 50 % of PM10 particles, it is assigned to the “coarse” group.
Filter Media
BBF Filtertechnik utilizes synthetic media and cellulose materials, depending on the specific application. This applies to particle filters as well as high-quality activated charcoal filters. All filter media complies with DIN EN 779 and DIN EN ISO 16890 standards. All filter classes can be manufactured according to DIN 53438 Class F1 (fire class) specifications with self-extinguishing media.
EFFICIENCY OF FILTER GROUPS ACCORDING TO ISO 16890 STANDARDS
Coarse
Coarse dust (ePM10)
Fine dust (ePM2.5)
Ultra-fine dust (ePM1)
50 % von PM10
50 % von PM10
50 % von PM2.5
50 % von PM1