Classification of the air filter :
1. Primary filter ( Pre-Filter )
- EN 779 class G2 to G4
- Average arrestance 70% to 95% (ASHRAE 52.1.1992)
- EUROVENT 4/5 class EU 2 to EU 4
2. Secondary filter ( Medium Filter )
- EN 779 class F5 to F9
- Average dust spot efficiency 70% to 95% (ASHRAE 52.1.1992)
- EUROVENT 4/5 class EU 5 to EU 9
3. HEPA filter
- EN 1822 class H10 to H14
- MPPS average efficiency ≥85% to ≥99.995%
- 0.3 µm D.O.P. efficeincy ≥95% to ≥99.99%
4. HEPA Teflon Filter
5. HEPA box
6. ULPA filter
- EN 1822 class U15 to U17
- MPPS average efficiency ≥99.9995%
- MPPS local efficiency ≥99.9975%