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