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Installation
19
DDF 125/150
*Flashing
The DDF 125/150 roof vent is designed
for installing ducting through pitched
tiles, pantiled, slate or shingle roofs.
The slope of the roof must be at least
22° to prevent the ingress of the
elements, such as rain or snow.
Consult a roofing expert for advice
regarding other types of roofing.
This motor unit is not suitable for
installation on a flat roof.
Installation must only be carried out
by a qualified and competent person.
Remove the roofing around the
installation area.
Bend the flashing* upwards.
Position the roof vent on the roof with
the air outlet directed down the roof.
Secure the roof vent to the roof
substructure with the fixing plate.
Replace the roofing. Press down on
the flashing to ensure that it creates a
proper seal.
The flashing should be fitted under
the roofing at the top of the roof vent
and above the roofing at the sides
and bottom of the roof vent.
The ducting collar on the roof vent has
a diameter of 150mm as standard.
If a diameter of 125mm is required the
reducing collar supplied must be used.
Push the flexible ducting onto the
connection on the roof vent and
secure it with a hose clip.
It has an integrated non-return flap.
When feeding the exhaust ducting
through the substructure of the roof,
be careful to ensure that any gaps
are sealed up properly afterwards.
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