Mechmaark filtech India Pvt. Ltd.
MechEasy Insulation India PVT. LTD.
1.1 General
Filter elements are classified in groups and classes according to their filtration performance (efficiency or penetration).
According to this standard, filter elements fall into one of the following Groups:
| Group E: | EPA filters | (Efficient Particulate Air filter); |
| Group H: | HEPA filters | (High Efficiency Particulate Air filter); |
| Group U: | ULPA filters | (Ultra Low Penetration Air filter). |
Groups and Classes of filters Filters are classified in Groups and Classes. For each group a slightly different test procedure applies. All filters are classified according to their filtration performance
Group E filters are subdivided in three Classes:
| Filtration performance: The filtration performance is expressed by the efficiency or the penetration of MPPS particles. |
| After testing in accordance with Clause 7, filter elements are classified according to Table 1, on the bases of their integral (Group E) or their integral AND local (Groups H and U) MPPS efficiency or penetration. Filters with filter media having an electrostatic charge are classified according to Table 1, on the bases of their discharged efficiency or penetration as per EN 1822-5:2009, |
| Filter Group | Integral value | Local value a b | ||
|---|---|---|---|---|
| Efficiency (%) | Penetration (%) | Efficiency (%) | Penetration (%) | |
| E 10 | ≥ 85 | ≤ 15 | ---C | ---C |
| E 11 | ≥ 95 | ≤ 5 | ---C | ---C |
| E 12 | ≥ 99,5 | ≤ 0,5 | ---C | ---C |
| H 13 | ≥ 99,95 | ≤ 0,05 | ≥ 99,75 | ≤ 0,25 |
| H 14 | ≥ 99,995 | ≤ 0,005 | ≥ 99,975 | ≤ 0,025 |
| U 15 | ≥ 99,999 5 | ≤ 0,000 5 | ≥ 99,997 5 | ≤ 0,002 5 |
| U 16 | ≥ 99,999 95 | ≤ 0,000 05 | ≥ 99,999 75 | ≤ 0,000 25 |
| U 17 | ≥ 99,999 995 | ≤ 0,000 005 | ≥ 99,999 9 | ≤ 0,000 1 |
| a See 7.5.2 and EN 1822-4. b Local penetration values lower than those given in the table may be agreed between supplier and purchaser. c Group E filters (Classes E10, E11 and E12) cannot and shall not be leak tested for classification purposes. |
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Mechmaark filtech India Pvt. Ltd.
MechEasy Insulation India PVT. LTD.