DDF 125/150
* Flashing
The roof vent can be used for installing
venting through pitched tiled, pantiled,
slate or shingle roofs; the slope of the
roof must be at least 22° to prevent the
ingress of rain or snow.
Consult a roofer for advice regarding
other types of roofing.
The roof vent is not suitable for
installation on flat roofs.
Installation must only be carried out
by a qualified 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 the bottom of the roof vent.
The roof vent stub has a diameter of
150 mm when the appliance is
supplied. An adapter is supplied for
use with 125 mm ducting.
^
If a diameter of 150 mm is required,
the front ring of the stub must be cut
off at the join with a sharp knife (see
illustration).
^
Push the flexible ducting onto the
stub and secure it with a hose clip.
It has an integrated non-return flap.
Important: when feeding the exhaust
ducting through the substructure of the
roof be careful to ensure that any gaps
are sealed up properly afterwards.
Installation
19
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