The WH25 fire dampers are designed for installation in ventilation ducts at the intersection of fire-resistant walls or ceilings in order to prevent the spread of fire and smoke in the ducts in the event of a fire. They have been tested and classified according to the standards EN 1366-2 and EN 13501-3 with a negative pressure of 500 Pa. They were designed for ventilation ducts with small diameters and tight installation spaces with special attention to optimal ventilation properties and acoustic properties. The various mechanisms are all installed outside the wall and can also be easily replaced after installation (excluded manual, standard). General properties : Housing made of galvanized sheet steel. Thermal labyrinth in the housing. Seals for connection to the ventilation ducts. Seali.
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