Fire Risk Areas
Given the possibility
that, during a fire storm, flying debris could shear or dislodge the
Condor Ventilator Terminal from it’s base, Condor engineers have
developed a device to arrest possible debris entry into the roof.
( optional equipment) is a perforated steel sheet tubular section, with
hole size of 3.5mm, and a sealed steel catchment tray welded to the
...(as per diagram)
The ‘basket’ is designed to
have the minimum proportional free air
value of 150% of ventilator throat.
Air is the unresisted value of the open area and
not the size of the opening.
Ventilators in Fire Risk Areas
a roof ventilator to a building in a fire risk area,
NOT INSERT FLYWIRE SCREENING INTO THE THROAT OF THE VENTILATOR
This is potentially
dangerous practice and can result in creating the very thing you were
attempting to guard against.
Dust and fibre will
rapidly seal the flywire on the underside and seal the throat of the
roof ventilator rendering it next to useless
If a fire is to
occur and come within close proximity to the ventilator, the fibre mass
on the screen will ignite and fall down INSIDE
the roof, as there is no exhaust movement of the air volume in the roof
ventilator throat due to having been sealed.
Condor has found
no evidence supporting the introduction of fine screening to the throat
of a roof ventilator designed to exhaust an air volume through thermal
or pressure differential.
There is however
a great deal of evidence showing that burning embers can and do gain
installation of flashings
inadequate flashing design
incorrect selection of flashings
inappropriate air intake, eave and gable vents
The Condor Roof
Ventilator, installed as per manufacturers recommendations, does not
fall into any of these categories.
The prevention of
ember entry is a separate function and not part of the overall design
of generic roof ventilators.
Any change to the
original design renders the ventilation product ineffective and possibly