The Helios VK 60/30 overpressure shutter features a flat design that automatically opens when the ventilation fan is switched on and closes upon fan shutdown, preventing unwanted reverse airflow. It is designed to operate effectively at flow velocities of up to 8 m/s.
The number of louvres varies according to the shutter size to ensure optimal airflow regulation. This shutter offers dependable backdraft prevention and efficient airflow management for ventilation systems in various applications.