Helios Fans VDD 355/4
Helios
Prices & Options
The Helios VDD 355/4 is a centrifugal roof fan designed for vertical air discharge, featuring an aerodynamically optimized casing made from seawater-resistant aluminium with integrated protective guards. The motor support and base plate, including the inlet cone, are constructed from galvanized steel. The base plate is equipped with threaded bolts for mounting intake air accessories, following the DIN 24155 hole pattern (page 3). A bird guard is included on the outlet side as standard, complying with DIN EN ISO 13857 safety standards.
This model utilizes a high-efficiency backward-curved centrifugal impeller made from durable polymer materials, dynamically balanced according to DIN ISO 1940 – 1 to ensure quiet and vibration-free operation.
The fan is powered by a speed-controllable, totally enclosed three-phase external rotor motor with IP 54 protection. It features ball bearings with impregnated windings for maintenance-free operation and includes radio interference suppression, providing reliable and efficient ventilation performance.
| Code & Description | Price | |
|---|---|---|
| VDD355/4 : Helios Fans VDD 355/4 | £930.00 + VAT £1,116.00 | |
We accept : 
15% discount with code ‘welcnfan1’
Note: Code can only be used once per customer. Discount codes are entered after selecting shipping method.
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