Helios Fans SB EC 125 A

The Helios SB EC 125 A is an EC centrifugal fan featuring a sound-absorbing casing made from galvanized sheet steel. It includes spigots compatible with standard duct sizes and is lined internally with 50 mm thick, abrasion-resistant mineral fibreboard for effective noise reduction. The fan has a removable lid and a retractable motor and impeller assembly, allowing easy access for maintenance.

The fan’s impeller is an energy-efficient forward curved centrifugal type, housed within an aerodynamically shaped galvanized sheet steel scroll. It is dynamically balanced to ensure low noise operation.

The unit is powered by an energy-saving, speed-controlled EC external rotor motor with IP44 protection and high efficiency. This motor is maintenance-free, equipped with ball bearings, and operates without radio interference. Integrated electronic temperature monitoring protects both the motor and its electronics. The fan comes standard with an internal potentiometer that allows setting any speed within its range. Additionally, stepless speed control is possible using an external potentiometer or the universal EUR-EC control system. Connections are made via a standard IP54 terminal box mounted on an extended cable.