Chimney flues and flue liners
5.19
Recommended flue sizes for the different models are:
1500 & 1200 Super De Luxe: 500 mm x 350 mm;
1000 De Luxe/Standard: 400 mm x 200 mm;
700 Standard: 300 mm x 200 mm
1200 Standard: 300mm x 300mm
5.20
Build the chimney flue slightly larger than smaller if you cannot
adhere to the recommended size. The internal flue size should under no
circumstances be smaller than the dimension of the smoke outlet at the
top of the gather.
5.21
The use of a Jetmaster moulded flue liner will ensure a perfect flue of the
correct size throughout. When such a liner is used, surrounding
brickwork can be reduced to 110 mm. Savings on brickwork and
plastering the inside of the chimney offset the costs of the liners.
5.22
The inside brickwork of the chimney needs to be plastered if a flue liner is
not used.
5.23
Ensure that the flue damper is erected the right side up.
5.24
The chimney flue should be at least 2 meters long to provide and
adequate draught, thereby preventing smoke from being expelled to the
front of the barbecue.
5.25
The level of the top of the chimney varies depending on roof type. Refer
to Fig. 10.
5.26
In the case of a thatch or timber-roofed home always ensure that the
chimney extends at least 1 m above the apex of the roof, irrespective of
the distance between chimney and roof apex. Only a
Jetmaster
rotating
cowl should be fitted. Never fit a fixed cowl in the case of a thatched roof.
5.27
A
Jetmaster
cowl (fixed or rotating) should be fitted to the top of the
chimney to prevent rain from entering the flue and causing unnecessary
corrosion of the barbecue box. This cowl also prevents downdraughts
and resultant smoking problems. In areas where there is high corrosion,
repaint the unit at least once a year with
Jetmaster
heat resistant paint.
5.28
In multiple installations, each barbecue unit should have its own flue
extending to the top of the chimney.
17
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