Helios Fans VDD EC 400

The Helios VDD EC 400 is a vertical discharge roof fan engineered with an efficiency-optimized housing made from seawater-resistant aluminium, featuring an integrated protection guard for durability and safety. The motor support and base plate are constructed from galvanised steel with an inlet cone, and the base plate includes threaded bolts for secure attachment of intake air accessories, complying with the DIN 24155 hole pattern (page 3). A bird guard conforming to DIN EN ISO 13857 standards is installed on the outlet side as standard.

This fan utilizes a high-efficiency backward curved centrifugal impeller crafted from durable polymers, dynamically balanced according to DIN ISO 1940 – 1 to ensure quiet and smooth operation.

Powered by an energy-efficient, speed-controllable electronically commutated (EC) external rotor motor in an enclosed IP54-rated design, the unit features moisture-protected ball bearings for maintenance-free and interference-free operation.

The fan includes integrated electronic temperature monitoring for both the motor and its electronics. It is supplied with an external terminal box and isolating switch rated IP65 for safety. An internal potentiometer allows precise speed adjustment between minimum and maximum levels, with continuously variable control available via the potentiometer or an optional universal control system, offering flexible and energy-efficient ventilation.