The Helios VK 100/50 is a compact, flat overpressure shutter designed for automatic operation in 100mm duct systems. It opens when the fan is active and closes automatically when the fan stops, ensuring efficient airflow control and backdraft prevention.
Capable of handling airflow speeds up to 8 m/s, this shutter helps maintain energy efficiency and system cleanliness by reducing air leakage and blocking dust or insects. The number of louvres varies by size. Ideal for discreet installations in residential and commercial ventilation systems where space and aesthetics are important.