Construction:
• fire ventilation grilles, class EI90
• fire ventilation dampers, class EI90
Design:
• in wall (ventilation grille)
• in leaf (ventilation grille, damper)
Useful area:
• grille up to 60 % net
• damper up to 80 % net
Installation:
- galvanised steel sheet
- expanded materials
- meltable fuse
- protective net
Finishing:
- galvanised, or
- plasticised in RAL colours
Thickness: 125 mm in door leaf
