GEBA Fire Protection Ceiling Seal AVR 125 DN125 # 32125

with clear cross-section made of galvanized sheet steel, with metallic quick-release fastener, corrosion and solder-free release device, intumescent material, enclosed by a smooth-walled plastic inner tube with completely clear cross-section. General building approval from DIBt Berlin Z-41.3-686. Fire resistance class K90 - 18017. Installation under, in or on the solid ceiling, alternatively under, in or on the timber beam ceiling F90 B. Fastening only by mortar grouting without screws, dowels or mortar anchors. No insulation required. Installation in classified shafts F30/L30 - F90/L90, minimum thickness 35 mm with any occupancy. For installation in ventilation systems according to DIN 18017-3 in steel ducts, e.g. spiral-seam, in central ventilation systems for supply and exhaust air, as well as for connecting individual ventilation units, fume cupboards or extractor hoods without their own fire protection requirements.