Comparison of Filter Classes

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%
Compare