Filter Classes

Approximate arrestance for particle-size-fractions of filter classes G1 to F9 (acc. EN 779); for clean filters

Particle size
[µm]
Arrestance [%]
G1 G2 G3 G4 M5 M6 F7 F8 F9
0,1 - - - 0 -10 5 - 15 25 - 35 35 - 45 45 - 60
0,3 - - - 0 - 5 5 - 15 10 - 25 45 - 60 65 - 75 75 - 85
0,5 - - 0 - 5 5 - 15 15 - 30 20 - 40 60 - 75 80 - 90 90 - 95
1 - 0 - 5 5 - 15 15 - 35 30 - 50 50 - 65 85 - 95 95 - 98 >98
3 0 - 5 5 - 15 15 - 35 30 - 55 70 - 90 85 - 95 >98 >99 >99
5 5 - 15 15 - 35 35 - 70 60 - 90 90 - 99 95 - 99 >99 >99 >99
10 40 - 50 50 - 70 70 - 85 85 - 98 >98 >99 >99 >99 >99

Note:
This table is meant to give an overview about filter classes. Specific arrestances can only be measured under consideration of the actual air media velocity.


Classification of “HEPA” and “ULPA” filters according to EN 1822

Filter class Integral value (for MPPS) 1) Local value 2)
Collection efficiency % Penetration % Collection efficiency % Penetration %
E10 85 15 - -
E11 95 5 - -
E12 99.5 0.5 - -
H13 99.95 0.05 99.75 0.25
H14 99.995 0.005 99.975 0.025
U15 99.9995 0.0005 99.9975 0.0025
U16 99.99995 0.00005 99.99975 0.00025
U17 99.999995 0.000005 99.9999 0.0001

1) Most Penetrating Particle Size (Minimum arrestance for particles between 0,1 - 0,3 µm)
2) The agreement of lower local values between buyer and seller is permitted