For ventilation of enclosed spaces that must be protected against the spread of fire and smoke. Prevents heat build-up through constant air exchange. Fire resistance class F30 to F120 in accordance with DIN 4102. Maintenance-free and inspection-free, no moving parts. Resistant to moisture, largely to oils, petrol and weak acids. Extremely easy to install. Use in individual cases on the basis of a project-related type approval (vBG).
