The roof ventilators shall be of the Ezifit Thru Roof series as
designed and manufactured by Fantech Pty Ltd.
The backward-curved centrifugal fans shall be direct-driven by
continuous rated speed-controllable external rotor motors with
auto-reset thermal protection.
The roof ventilator duct shall be constructed from galvanised
steel, cowl from UV Stabilised ABS plastic and be suitable for tile
and metal deck type roofs. It shall include a 3-pin plug and lead
with an additional 3-pin connection between the upstand and
motor assembly.
All data shall be based on tests on a complete assembled unit
according to ISO5801:2007 for air flow and BS848: Part 2, 1985
for noise.