The Helios Fans RSK 180 is an automatic backdraught shutter designed for in-line installation in ventilation ducting. Suitable for both intake and exhaust applications, it can be mounted in any orientation, offering flexible installation options for residential, commercial, or industrial ventilation systems.
This shutter effectively prevents unwanted reverse airflow using a spring-loaded mechanism that activates automatically with airflow changes. The casing is made from robust galvanized steel, ensuring durability and corrosion resistance, while the flaps are constructed from lightweight aluminum for responsive operation. A stainless steel spring provides reliable performance over time.
The RSK 180 is an ideal solution for maintaining airflow integrity and protecting ventilation systems from external air intrusion.