Osburn
Matrix
Inbuilt
Installation
and
Operation
Manual
20
______________________________________________________________________________
4.5
FAN
OPERATION
Allow
the
wood
inbuilt
to
reach
operating
temperature
(approximately
one
hour),
before
turning
on
the
fan,
since
increased
airflow
from
the
fan
will
remove
heat
and
affect
the
start
‐
up
combustion
efficiency.
The
wood
inbuilt's
fan
assembly
is
equipped
with
a
heat
sensor.
Therefore,
you
can
leave
the
switch
in
the
automatic
position
(3).
The
fan
will
start
automatically
when
the
wood
inbuilt
is
hot
enough
and
it
will
stop
when
the
wood
inbuilt
has
cooled
down.
You
can
also
set
the
switch
to
the
manual
position
(1)
to
operate
the
fan
at
any
time.
Select
the
position
(2)
to
manually
stop
the
fan.
NOTE:
ENSURE
THE
FAN
CORD
IS
NOT
IN
CONTACT
WITH
ANY
SURFACE
OF
THE
WOOD
INBUILT
TO
PREVENT
ELECTRICAL
SHOCK
OR
FIRE
DAMAGE.
DO
NOT
RUN
CORD
BENEATH
THE
WOOD
INBUILT.
4.5.1
BUILDING
DIFFERENT
FIRES
FOR
DIFFERENT
NEEDS
Using
the
air
control
is
not
the
only
way
to
match
the
wood
inbuilt’s
heat
output
to
the
heat
demand.
Your
house
will
need
far
less
heat
in
April
than
in
July
to
be
kept
at
a
comfortable
temperature.
If
you
fill
the
firebox
full
in
fall
weather,
you
will
either
overheat
the
space
or
turn
the
wood
inbuilt
down
so
much
that
the
fire
will
be
smoky
and
inefficient.
Here
are
some
suggestions
for
building
fires
to
match
different
heat
demand.
4.5.1.1
Small
Fires
to
Take
the
Chill
Off
the
House
To
build
a
small
fire
that
will
produce
a
low
heat
output,
use
small
pieces
of
firewood
and
load
them
crisscross
in
the
firebox.
The
pieces
should
be
only
75
mm
to
100
mm
in
diameter.
After
raking
the
coals,
you
can
lay
two
pieces
parallel
to
each
other
corner
to
corner
in
the
firebox
and
lay
two
more
across
them
in
the
other
direction.
Open
the
air
control
fully
and
only
reduce
the
air
after
the
wood
is
fully
flaming.
This
kind
of
fire
is
good
for
mild
weather
when
you
are
around
to
tend
the
wood
inbuilt
and
should
provide
enough
heat
for
four
hours
or
more.
Small
fires
like
this
are
a
good
time
to
use
softer
wood
species
so
there
will
be
less
chance
of
overheating
the
house.