The centrifugal extraction fans shall be of the STORM Fan series as
supplied by Fantech Pty. Ltd. and be of the model numbers
shown on the schedule/drawing.
The housings and impellers shall be made from high density,
UV treated polypropylene that is resistance to chemical corrosion.
Impellers shall be forward-curved and the cowl preset to 1 of 8
discharge positions, rotated by 45° increments.
The centrifugal extraction fan shall be driven by a direct drive
motor and designed to operate with a variable speed controller
or variable speed drive
They shall be fitted with inlet spigot and discharge flange, and
come standard with an epoxy coated metal stand.
Air flow test data shall be based on ISO5801:2017. Noise test
data shall be based on ISO 13347.