Testing Method- EN vs. ASHRAE
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| Filter Group | Filter Class EN 779-2012 |
ASHRAE 52.1 | ASHARE 52.2 - 2007 MERV Rating |
|
|---|---|---|---|---|
| Arrestance | DS Efficiency | |||
| G Arrestance Filter |
G1 | <65% | - | 1 |
| G2 | 65%<70% | - | 2 | |
| G2 | 70%-75% | - | 3 | |
| G2 | 75%-80% | <20% | 4 | |
| G3 | 80% | 20% | 5 | |
| G3 | 85% | 20%<25% | 6 | |
| G4 | 90% | 25%<30% | 7 | |
| G4 | 92% | 35%<40% | 8 | |
| M (Medium Efficiency Filters) |
M5 | 95% | 40%<45% | 9 |
| M5 | 96% | 50%<55% | 10 | |
| M6 | 97% | 60%<65% | 11 | |
| M6 | 98% | 70%<75% | 12 | |
| F (DS Efficiency Filters) |
F7 | 98% | 80%<85% | 13 |
| F8 | 99% | 90%<95% | 14 | |
| F9 | 99% | 95% | 15 | |
| Filter Group | Filter Class EN 1822-2012 |
ASHRAE 52.1 | ASHARE 52.2 - 2007 MERV Rating |
Efficiency @ 0.3 micron |
Efficiency @ MPPS |
|
|---|---|---|---|---|---|---|
| Arrestance | DS Efficiency | |||||
| E (Efficiency Particular Filter) |
E10 | 100% | 98% | 16 | - | <85% |
| E11 | - | - | - | 95% | <95% | |
| E12 | - | - | - | 98% | <99.5% | |
| H (HEPA Filters) |
E13 | - | - | - | 99.99% | <99.95% |
| E14 | - | - | - | 99.999% | <99.995% | |
| Efficiency @ 0.12 micron | ||||||
| U (ULPA Filters) |
U15 | - | - | - | 99.9995% | <99.9995% |
| U16 | - | - | - | 99.99995% | <99.99995% | |
| U17 | - | - | - | 99.999995% | <99.999995% | |
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