Helios Fans SB EC 400 B

The Helios SB EC 400 B is an EC centrifugal fan designed for quiet and efficient ventilation. It features a sound-absorbing casing made from galvanized sheet steel, equipped with round connectors compatible with standard duct systems. Inside, the casing is lined with perforated sheet metal and a 50 mm thick mineral fibre board to reduce noise effectively. The fan includes a swing-out cover for convenient access, and the motor and impeller unit is retractable to facilitate maintenance.

The fan uses a highly efficient backward curved centrifugal impeller that is dynamically balanced to ensure smooth and quiet operation.

The unit is powered by an energy-saving, speed-controlled EC external rotor motor with IP44 protection, providing maximum efficiency. This motor is maintenance-free, ball bearing mounted, and operates without radio interference. Integrated electronic temperature monitoring protects both the motor and electronics. Fan speed can be adjusted with an internal potentiometer or controlled steplessly via an external potentiometer or the universal EUR-EC control system. Connections are made through a standard IP54 terminal box mounted on an extended cable.