Systemair India has received UL555 S certification with Class-1 leakage for the smoke dampers produced in its Greater Noida factory. These dampers have double skin aerofoil 2V blade design with high performance blade seal, heavy duty interlocking blades, fully enclosed blade linkage mechanism and précised stainless steel side seal. These actuator controlled sleeved smoke dampers have been designed for use in heating, ventilating and air conditioning duct systems passing through fire resistive walls or partitions, and for use in smoke control systems.