Comparison of Filter Classes

Various filtration standards are compared below. Although some of these standards build on one another and are coordinated with one another. Due to the different test conditions, a comparison of the filter classes is only possible approximately! Our Team will be happy to support you in selecting suitable Air filter!

Comparison of filter classes according EN 779, EN 1822 and ASHRAE 52.2.

EN 779:2012 EN 779:2012 EN 1822:2009 ASHRAE‑Standard 52.2-2007
Coarse Filters Average Arrestance (Am) Final Test Pressure Drop 250 [Pa] Medium- and Fine Filters Average Efficiency (Em) and Minimum Efficiency(M.E.) of 0.4 µm particles Final Test Pressure Drop 450 [Pa] (H)EPA- and ULPA-Filters Efficiency Minimum Efficiency Reporting Value (MERV)
50% ≤ Am < 65%
G1
    MERV 1-4
65% ≤ Am < 80% 
G2
    MERV 1-4
80% ≤ Am < 90%
G3
  MERV 5
90% ≤ Am
G4
MERV 6-8
  40% ≤ Em < 60%
M5
  MERV 8-10

  60% ≤ Em < 80%
M6
  MERV 9-13
  80% ≤ Em < 90%
M.E.: 35%
F7
  MERV 13-14
  90% ≤ Em < 95%
M.E.: 55%
F8
  MERV 14-15
  95% ≤ Em
M.E.: 70%
F9
  MERV 16
    Overall Value ≥ 85%
E10
MERV 16
 
Overall Value ≥ 95%
E11
MERV 16
 
Overall Value ≥ 99.5%
E12
 
  Overall Value ≥ 99.95%
H13
Local Value ≥ 99.75%
 
Overall Value ≥ 99.995%
H14
Local Value ≥ 99.975%
  Overall Value ≥ 99.9995%
U15
Local Value ≥ 99.9975%
  Overall Value ≥ 99.99995%
U16
Local Value ≥ 99.99975%
  Overall Value ≥ 99.999995%
U17
Local Value ≥ 99.9999%

Comparison of filter classes according to EN 779 and ISO 16890

EN 779:2012
ISO 16890 - Average Efficiency
Filter Classes
ePM1 ePM2,5 ePM10 Coarse
G1 - - - -
G2 - - - 30%-50%
G3 - - - 45%-65%
G4 - - - 60%-85%
M5 5%-35% 10%-45% 40%-70% 80%-95%
M6 10%-40% 20%-50% 60%-80% >90%
F7 40%-65% 65%-75% 80%-90% >95%
F8 65%-90% 75%-95% 90%-100% >95%
F9 80%-90% 85%-95% 90%-100% >95%

References:

- VDMA Air Filter Information (2018-06) page 6 for filter classes G1 - G4 respectively ISO Coarse

- EUROVENT 4/23:2020, page 18 / 9. Annex for filter classes M5 - F9 respectively ePM10, ePM2,5 und ePM1

Comparison of filter classes according to EN 1822 and ISO 29463

Overall Value Local Value
Filter Classes

according EN 1822

Filter Groups

according ISO 29463


Efficiency

Penetration

Efficiency

Penetration
E10 - ≥ 85% ≤ 15% - -
E11 ISO 15 E ≥ 95% ≤ 5 % - -
ISO 20 E ≥ 99% ≤ 1% - -
E12 ISO 25 E ≥ 99.5% ≤ 0.5% - -
ISO 30 E ≥ 99.90% ≤ 0.1% - -
H13 ISO 35 H ≥ 99.95% ≤ 0.05% ≥ 99.75% ≤ 0.25%
ISO 40 H ≥ 99.99% ≤ 0.01% ≥ 99.95% ≤ 0.05%
H14 ISO 45 H ≥ 99.995% ≤ 0.005% ≥ 99.975% ≤ 0.025%
ISO 50 U ≥ 99.999% ≤ 0.001% ≥ 99.995% ≤ 0.005%
U15 ISO 55 U ≥ 99.9995% ≤ 0.0005% ≥ 99.9975% ≤ 0.0025%
ISO 60 U ≥ 99.9999 % ≤ 0.0001% ≥ 99.9995%
≤ 0.0005%
U16 ISO 65 U ≥ 99.99995% ≤ 0.00005% ≥ 99.99975% ≤ 0.00025%
ISO 70 U ≥ 99.99999% ≤ 0.00001% ≥ 99.9999% ≤ 0.0001%
U17 ISO 75 U ≥ 99.999995% ≤ 0.000005% ≥ 99.9999% ≤ 0.0001%

Comparison of filter classes according to ISO 16890, ISO 29463 and ISO 29461

Filter classes according to ISO 29461
Filter groups
Test results according to ISO 29463
Test results according to ISO 16890

Efficiency at MPPS ePM1,min ePM2,5,min ePM10 Initial gravimetric arrestance A100
ISO T1


Coarse
20 % < A100 < 50 %
ISO T2 ≥ 50 %
ISO T3 ≥ 70 %
ISO T4 ≥ 85 %
ISO T5 ePM10 ≥ 50 %
ISO T6 ePM2,5 ≥ 50 %
ISO T7

e
PM1
≥ 50 %
ISO T8 ≥ 70 %
ISO T9 ≥ 85 %
ISO T10

EPA
≥ 85 %
ISO T11 ≥ 95 %
ISO T12 ≥ 99,5 %
ISO T13 HEPA ≥ 99,95 %
Compare