The Helios VK 40/20 is a compact, flat-design overpressure shutter built for ventilation systems with 400×200 mm air outlets. Designed to automatically open and close with the fan’s operation, it effectively prevents reverse airflow and improves system efficiency.
Capable of handling airflow speeds up to 8 m/s, the VK 40/20 ensures reliable air management while minimizing energy loss when the system is inactive. Its louvre count is optimized based on the size, providing balanced airflow with minimal resistance. This shutter is an ideal solution for maintaining airflow integrity in both residential and light commercial ventilation applications.