Ventilators in Fire Risk Areas
consideration of the possibilty that flying debris could somehow
enter the Condor Ventilator during a fire storm Condor engineers
have developed a device to arrest that possibility and ensure
‘basket’ ( optional equipment)
is a fabricated in perforated 2mm stainless steel tubular section
with a sealed steel catchment tray, is fitted to the underside
of the ventilator
The ‘basket’ is designed
to have the minimum proportional surface
free air value of 120% of ventilator throat.
is the unresisted value of the open area and not the size of the
Flow resistance should be noted when sizing the ventilator and
the next size up be considered an appropriate alternative
installing any roof ventilator to a building in a fire risk area,
NOT INSERT FLYWIRE SCREENING INTO THE THROAT OF A VENTILATOR
only is this a potentially dangerous practice and can result in
creating the very thing you were attempting to guard against but
it will also diminish ventilator performance
and fibre. carried by the flow, will rapidly seal the flywire
on the underside and seal the throat of the roof ventilator rendering
a fire come within close proximity to the ventilator, the dust/fibre
mass on the screen can ignite and fall down INSIDE
the roof space. Egress of roof air volume is not possible if roof
ventilator is choked by dust.
35 years Condor has found no evidence supporting the introduction
of fine screening to the throat of a Condor roof ventilator.
is a great deal of evidence showing that burning embers do gain
inappropriate roof ventilator installed
incorrect installation of flashings
* inadequate flashing design
* incorrect selection of flashings
* inappropriate air intake, eave and gable
Condor Roof Ventilator or Cupola, installed as per manufacturers
recommendations, does not fall into any of these categories.
prevention of ember entry is a separate function and not part
of the overall design of generic roof ventilators.
change to the original design renders the ventilation product
ineffective and possibly dangerous
should be sought from Condor engineers whenever variations are