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Filter classification for general ventilation technology according to EN 779/DIN 24185

Filter type

EN 770


Filter class

DIN 24185


old filter class



Average efficiency (atmospherically)  Em %

Average arrestance
Am %

Coarse filterG1EU1Under 65
Coarse filterG2EU265 less than 80
Coarse filter


EU380 less than 90
Coarse filterG4EU490 and more
Fine filter
G5EU540 less than 60
Fine filterG6EU660 less than 80
Ultrafine filter
G7EU780 less than 90
Ultrafine filter
G8EU890 less than 95
Ultrafine filterG9EU995 and more