The Helios VK 50/30 overpressure shutter features a flat design and automatically opens when the fan is running and closes when it stops, preventing reverse airflow. Suitable for flow velocities up to 8 m/s, it ensures reliable ventilation system protection.
The shutter includes a variable number of louvres tailored to the size for optimal airflow management. It is ideal for use in residential and commercial ventilation installations where efficient air control and backdraft prevention are required.