The Helios Fans RSD 450/400 is a compact and effective duct silencer designed to reduce noise in ventilation systems without compromising airflow. Its robust galvanized sheet steel housing offers excellent durability and corrosion resistance. Inside, the silencer is lined with premium-quality mineral wool for superior sound absorption, while a protective fleece layer on the flow side prevents fiber erosion and maintains clean airflow.
This unit is engineered for seamless integration with standard duct systems, featuring dimensions and a hole pattern compatible with standard fan diameters (R 20) as per DIN 24155 specifications. With its low flow resistance, the RSD 450/400 is an ideal solution for maintaining acoustic comfort in commercial and industrial HVAC applications.