Additional permanent ventilation with internal grille in the sanitary and kitchen area. Fastening by means of sheet metal / spax screws: Ø 3.5 mm x length (roof thickness minus 5 mm).
Technical data:
- For roof thicknesses: from 25 mm
- Ventilation width: Ø 100 mm
- Roof cutout: Ø110 mm
- Internal grid: 2x2 mm
- Ventilation cross-section: 16 qcm