Helios Fans VDW 400/4

The Helios VDW 400/4 is a high-performance centrifugal roof fan engineered for vertical discharge, offering energy-efficient and low-noise operation. Its robust casing is made from seawater-resistant aluminium, providing excellent durability in outdoor environments. The fan incorporates a built-in protection guard for safety and reliability. The motor support and base plate, crafted from galvanised steel, feature an integrated inlet cone to enhance airflow. The base plate includes threaded bolts for secure attachment of intake-side accessories, following the DIN 24155 (page 3) standard. A bird guard is fitted as standard at the outlet, meeting DIN EN ISO 13857 safety regulations.

This model features a backward curved centrifugal impeller made from high-quality polymers, dynamically balanced to DIN ISO 1940 – 1 for smooth and efficient performance.

Powered by a totally enclosed single-phase external rotor motor with IP54 protection, the VDW 400/4 is equipped with ball bearings and impregnated windings for enhanced longevity and moisture resistance. The fan is speed-controllable, maintenance-free, and radio suppressed — making it ideal for residential, commercial, or light industrial roof ventilation applications.