Helios Fans VDD EC 450 B

The Helios VDD EC 450 B is a vertical discharge roof fan featuring an efficiency-optimized casing made from seawater-resistant aluminium with an integrated protection guard for enhanced durability. The motor support and base plate are constructed from galvanised steel and include an inlet cone. The base plate is fitted with threaded bolts designed for easy connection of intake air accessories, adhering to the DIN 24155 hole pattern (page 3). A bird guard compliant with DIN EN ISO 13857 is provided on the outlet as standard.

This fan is equipped with a high-efficiency backward curved centrifugal impeller crafted from durable polymers and dynamically balanced in accordance with DIN ISO 1940 – 1 for smooth and quiet operation.

Power is supplied by an energy-saving, speed-controllable electronically commutated (EC) external rotor motor housed in an IP54-rated enclosure. The motor features ball bearings with moisture protection insulation, ensuring maintenance-free and interference-free operation.

Integrated electronic temperature monitoring safeguards both the motor and its electronics. The unit comes standard with an external terminal box and an external isolating switch rated IP65. An internal potentiometer allows for precise control of the fan speed anywhere between minimum and maximum. Continuous speed adjustment is available via the potentiometer or a universal control system, enabling flexible and energy-efficient ventilation.