Osburn
Matrix
Inbuilt
Installation
and
Operation
Manual
36
______________________________________________________________________________
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
inspected
for
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
mm
2
.
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
mm
2
.
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
.
