Osburn
Matrix
Inbuilt
Installation
and
Operation
Manual
______________________________________________________________________________
35
CLEARANCES
F
80
mm
G
1250
mm
H
1340
mm*
MAXIMUM
PROTRUSION
M
40
mm
N
40
mm
MINIMUM
MASONRY
OPENING
I
622
mm
J
781
mm**
K
439
mm
***
O
30
mm
P
30
mm
FLOOR
PROTECTION
B
500
mm
L
975
mm
*
For
a
250
mm
mantel
shelf.
**
Where
a
fresh
air
intake
is
needed,
we
suggest
you
add
a
minimum
of
102
mm
(4’’)
to
the
width
of
the
minimum
masonry
opening.
***
If
projection
kit
AC01323
(sold
separately)
is
used
L
=
439
mm
.
If
installed
without
projection
kit
L
=
541
mm.
Note
1:
From
door
opening.
The
depth
of
the
hearth
extension
in
front
of
the
wood
inbuilt
is
included
in
the
calculation
of
the
floor
protector’s
dimensions.
Note
2:
A
min
80
mm
air
gap
between
the
flue
outer
casing
and
the
first
timber
stud
above
the
fireplace
insert
is
required.
Note
3:
The
first
internal
wall
stud
must
be
150
mm
above
the
fireplace
insert
top
and
the
front
wall
up
to
that
first
stud
must
be
made
of
non
‐
combustible
material.
