Fire Damper, Curtain Type – Wall Mounted Duct to Duct ____________

Horizontal Fire Dampers shall be Holyoake Mode IBD-FS-AH-MSU Horizontal Fire Dampers shall be Interlocking Blade Curtain type constructed to comply with details proven by prototype tests conducted in accordance with A.S. 1530.4, 2014 to withstand exposure to controlled flame for no less than 4 hours before failure of the assembly and any of its components. Curtain Type Fire Dampers shall be spring loaded for complete travel with blade stack located within air stream and shall close by release of a fusible link at a temperature of 71 Degree C. Horizontal Fire dampers shall be constructed to comply with A.S. 1682-1 and 2, 1990.