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Osburn Matrix Inbuilt Installation and Operation Manual
9 THE FLUE SYSTEM
9.1 GENERAL
The flue system, made up of the flue system and the flue between the wood inbuilt and the flue
system, acts as the engine that drives your wood heating system. Even the best wood inbuilt will
not function safely and efficiently as intended if it is not connected to a suitable flue system.
The heat in the flue gases that pass from the wood inbuilt and flue into the flue system is not
waste heat. This heat is what the flue system uses to make the draft that draws in combustion air,
keeps smoke inside the wood inbuilt and safely vents exhaust to outside. You can think of heat in
the flue gas as the fuel the flue system uses to make draft.
9.2 SUITABLE FLUE SYSTEMS
Your wood inbuilt will provide optimum efficiency and performance when connected to a 150 mm
diameter flue liner. The reduction of liner diameter to less than 150 mm should only be done if the
total height of the masonry flue system is greater than 20 feet.
9.3 LINER INSTALLATION
For appliances discharging combustion
products through a chimney, the
chimney
shall
be
soundness and thoroughly cleaned
before a flue pipe is installed. The air
gap between the flue pipe and the
chimney shall be open at the top of the
chimney to the extent that the total
opening area is not less than 10 000
2
mm
. The chimney exit shall be fitted
with means to prevent significant
ingress of water and debris, and such
means shall be constructed and fitted to
maintain a total opening area at the
chimney exit of not less than 10 000
2
mm
.
The flue pipe to inbuilt used in the
chimney shall comply with AS/NZS
2918.
In order to connect the wood inbuilt to
the flue liner, refer to Section 9.4 Flue
liner installation.
36 ______________________________________________________________________________
inspected
for
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