Helios Fans VDW 450/4

The Helios VDW 450/4 is a centrifugal roof fan designed for vertical air discharge and built to deliver efficient and reliable performance. Its robust housing is constructed from seawater-resistant aluminium, ensuring long-lasting durability in outdoor installations. The casing features an integrated protection guard for added safety. The motor support and base plate are made of galvanised steel and include an inlet cone to optimise airflow. Threaded bolts on the base plate allow for the secure mounting of intake air accessories in accordance with DIN 24155 (page 3). A standard bird guard is fitted at the outlet, complying with DIN EN ISO 13857 safety standards.

Equipped with a high-efficiency, backward curved centrifugal impeller made from high-grade polymers, the impeller is dynamically balanced to DIN ISO 1940 – 1 for smooth and efficient airflow.

The fan uses a totally enclosed single-phase external rotor motor with IP54 protection. It features ball bearing mounting and impregnated windings for moisture resistance and long-term reliability. The unit is speed-controllable, maintenance-free, and radio suppressed, making it ideal for use in residential, commercial, or light industrial roof ventilation systems.