The centrifugal extraction fans shall be of the JET 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.
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 a UV treated polypropylene weather
cover cone.
Air flow test data shall be based on ISO5801:2017. Noise test
data shall be based on ISO 13347.