Being one of the leading European fan producers Helios always impress their customers anew with their extraordinary standard range of axial fans covering all pressure and volume ranges. The HQD Plate axial fans three phase 415V fans are designed for wall or partition mounting (also roof mounting see RC+ HQ..) with the motor, impeller and guard mounted on a square plate. Available in sizes from 200mm to 630mm diameter and reversible with 70% flow fully speed controllable.