Helios Fans VDD 500/4

The Helios VDD 500/4 is a high-performance centrifugal roof fan designed for vertical air discharge in commercial and industrial ventilation systems. Its casing is constructed from seawater-resistant aluminium and includes an integrated protection guard to ensure durability and operational safety.

The motor support and base plate, along with the inlet cone, are made from galvanized steel for added structural strength. Threaded bolts on the base plate allow for the easy installation of intake-side accessories, following the standard hole pattern in accordance with DIN 24155 (page 3). A bird guard is installed on the outlet side as standard, meeting the safety guidelines outlined in DIN EN ISO 13857.

Equipped with a backward-curved centrifugal impeller made from durable polymer materials, the fan is dynamically balanced to DIN ISO 1940 – 1 standards, ensuring quiet and vibration-free performance.

Power is provided by a speed-controllable, totally enclosed three-phase external rotor motor with IP 54 protection. The motor includes ball bearings with impregnated windings, offering maintenance-free operation and built-in radio interference suppression, making the VDD 500/4 a reliable and efficient choice for rooftop ventilation applications.