Preliminary and intermediate filter
For the pre-filtration in ventilation systems and devices of all kinds up to fine dust filtration.
Dimensions:
- 610 x 910 x 47 mm, Filter quality G3 (EU3) and G4 (EU4)
- 610 x 610 x 47 mm, Filter quality G3 (EU3) and G4 (EU4)
- 305 x 610 x 47 mm, Filter quality G3 (EU3) and G4 (EU4)
305 x 305 x 47 mm, Filter quality G3 (EU3) and G4 (EU4)
Technical data
| Quality class G3 (EU3) | Quality class G4 (EU4) | |
| Frame | Cardboard frame, 47 mm wide | Cardboard frame, 47 mm wide |
| Filter medium | Glass wool | Synthetic |
| Filtration efficiency (Am) | 85 % | 90 % |
| Nominal volume flow | 5400 m³/h/m² | 5400 m³/h/m² |
| Nominal volume speed by nominal volume | 1,5 m/s | 1,5 m/s |
| Starting pressure difference | 30 Pa | 42 Pa |
| Recommanded final pressure difference | 450 Pa | 250 Pa |
| Temperature / air humidity | 100 °C / 100 % RF | 100 °C / 100 % RF |