The fans shall be of the Ring Plate Series designed and manufactured by Fantech Pty Ltd.
The axial impellers shall be direct-driven by speed-controllable external rotor motors with internal thermal protection.
The fan rings and impellers shall be of galvanised steel with a powder coat finish.
All models shall be fully tested to ISO 5801:2004 for air flow and BS848:Part 2, 1985 for noise.