30
4.
inBUilt into iSlanD Wall
step 12: flue installation
triple skin flue is to then be continued on top of the cavity lid.
The lower end of the triple skin casing shall be close fitting
against the lid and the outer casing must be ventilated. air
vents on the first length of triple skin flue must be cut (please
use diagram as a guide), or manufactured into the bottom
length of the flue.
15°
300mm
below
Ceiling
CaVity lid
to be fully
sealed to
all edges.
step 13: flue installation
Where the flue passes through the lid of the enclosure the flue
shall be single skin, the triple skin flue must sit on top of lid of
the enclosure. the lower end of the triple skin casing shall be
close fitting against the lid and must be ventilated.
the triple skin flue will then be continued into the roof cav-
ity and above the roof line, as per australian & new Zealand
Standard aS/nZ 2918:2001. there must be a 25mm clearance
around the outer triple skin flue, the flue must extend a mini-
mum 1m above the roof line and have a 3m clearance all the
way around.
**iMPortant**
the flue should not include more than two 45
°
degree bends.
the angle of these bends cannot exceed more than 45
°
and can
have no more than one length of 900mm flue between them.
step 10: CaVity lid
**important**
side Vents
it is highly recommended the cavity lid be installed flat to
ensure sufficient air flow around the appliance if 2 vents are
used.
front Vents
it is highly recommended the cavity lid be installed on an angle
of 15° facing the front of the fireplace to ensure sufficient air
flow around the appliance.
the cavity lid must be installed 300mm below the ceiling and
is comprised of the following; minimum 0.5mm thick steel
plate for support, followed by a 12mm thick heat resistant
sheet, with 1 x 25mm rockwool sheet. a hole is to be cut in
the centre of the lid in order for the single skin flue to penetrate
through tightly. you may also use a heat resistance sealant(i.e.
firecork)and heat proof tape to seal the any air gaps.
please
ensure the cavity lid is fully sealed to all edges.
