The Elta 018 – 250-DAMPER is a 250mm air damper designed to prevent reverse airflow in ventilation systems when the fan is not running. It features a robust galvanised sheet steel casing for durability and corrosion resistance. The damper is equipped with spring-operated aluminium blades that close automatically, ensuring reliable prevention of backflow. Suitable for use in ducted ventilation systems, this damper enhances airflow control and system efficiency.