Helios Fans VDD 400/6

The Helios VDD 400/6 is a centrifugal roof fan designed for vertical air discharge, equipped with an aerodynamically optimized casing made from seawater-resistant aluminium, including integrated protective guards. The motor support and base plate, as well as the inlet cone, are constructed from galvanized steel. The base plate features threaded bolts to facilitate the attachment of intake air accessories, adhering to the DIN 24155 hole pattern (page 3). A bird guard is standard on the outlet side, compliant with DIN EN ISO 13857 safety requirements.

This fan is fitted with a high-efficiency backward-curved centrifugal impeller manufactured from durable polymer materials. The impeller is dynamically balanced according to DIN ISO 1940 – 1 standards, ensuring smooth and vibration-free operation.

The fan is powered by a speed-controllable, totally enclosed three-phase external rotor motor with IP 54 protection. It includes ball bearings with impregnated windings for maintenance-free operation and is radio suppressed to minimize interference, delivering reliable and efficient ventilation performance.