Designation
European Filter Class
MERV Rating
Recomended Final Pressure Drop (Pa)
Average Arrestance (Am) of Synthetic dust (%)
Averange Efficiency (Em) of 0,4µ Particles (%)
Minimum Efficiency for 0,4µ Particles (%)
ISO ePM1
EN 779-2012
ASHRAE 52.2
ISO ePM1
ISO ePM2,5
ISO ePM10
M
M5
M6
MERV 9-10
MERV 11-12
450
450

-

-

40 ≤ Em < 60
60 ≤ Em < 80

-

-

-

-

-

50-65 %
> 50 %
> 60 %
F
F7
F8
F9
MERV 13
MERV 14
MERV 15
450
450
450

-

-

-

80 ≤ Em < 90
90 ≤ Em < 95
95 ≤ Em
35
55
70
50-65 %
65-80 %
> 80 %
65-80 %
> 80 %
> 95 %
> 85 %
> 90 %
> 95 %