Osburn
Matrix
Inbuilt
Installation
and
Operation
Manual
32
______________________________________________________________________________
If
non
‐
combustible
material
floor
protection
needs
to
be
added
in
front
of
the
hearth
extension
of
the
masonry
fireplace,
it
must
be
made
of
cement
sheet
or
similar
material
with
a
thermal
conductivity
of
0,8
m².K/W
per
4
mm
thick
and
have
a
thickness
of
24
mm.
The
floor
protection
should
be
1070
mm
deep
(D)
x
945
mm
width
(W)
The
standard
configuration
of
the
wood
inbuilt
leaves
no
projection
of
the
convection
air
jacket
in
front
of
the
fireplace
opening
.
Therefore
the
minimum
projection
is
0''
.
Although
i
t
is
possible
to
position
the
wood
inbuilt
to
obtain
a
projection
of
51
mm
(2''
)
or
102
mm
(4''
)
of
the
convection
air
jacket
in
front
of
the
fireplace
opening
with
the
use
of
the
“PROJECTION
KIT”
option
AC01323
.
The
choice
of
the
configuration
will
depend
on
,
the
previous
installation
instructions
and
compliance
with
building
code
.
To
determine
the
minimum
and
maximum
projection
of
the
wood
inbuilt,
refer
to
table
Data
for
floor
protection
calculation
.
