Helios Fans VDW 225/4

The Helios VDW 225/4 is a high-performance centrifugal roof fan designed for vertical air discharge and dependable ventilation. Its robust casing is constructed from seawater-resistant aluminium, offering long-lasting protection in demanding environments. An integrated safety guard enhances operational safety. The fan includes a galvanised steel motor support and base plate with an aerodynamic inlet cone to improve airflow. The base plate features threaded bolts for secure attachment of intake-side accessories, complying with DIN 24155 (page 3) standards. A standard bird guard on the outlet meets DIN EN ISO 13857 requirements.

Equipped with a backward curved centrifugal impeller made from galvanised sheet steel, the unit is dynamically balanced according to DIN ISO 1940 – 1 to ensure efficient, low-vibration performance.

The fan is powered by a totally enclosed, speed-controllable single-phase external rotor motor, offering IP44 protection. The motor features ball bearing mounting and impregnated windings for increased durability and moisture resistance. Designed for quiet, maintenance-free, and interference-free operation, the VDW 225/4 is an ideal solution for effective and reliable roof-mounted ventilation.