36
1/2” (13mm) thick
non-combustible
cement board
Joints preferred
at corners to
prevent cracking
Gypsum board
up to perimeter
of cement board
Min.
9-1/4”
(235 mm)
Min.
44-1/2”
(1130 mm)
Min.
20-1/2”
(521 mm)
14-3/4”
(375 mm)
Possible screw
locations
Possible screw
locations (in the
designated space)
Maximum recommended
screw length 1-1/4”
Board flush with
bottom of heater;
add extra if
overlapping
framing.
50”
(1270 mm)
Min. 60”
(1524 mm)
1/4”
(235 mm)
Possible scr
ew loc
(in the designat
ed
ar
d flush with bo
of heat
er; add ex
tra
overlapping fr
aming
Appliance Preparation
Wall Finishing
Non-combustible cement board
The L2 Linear
fi
replace requires a 1/2”
(13 mm) thick non-combustible cement
board to be used as a wall surface
immediately surrounding the unit on each
side—see diagram below for minimum
coverage.
Extending the cement board well beyond
the minimum shown will help avoid cracking
due to differential expansion of materials.
Cement board may be screwed—using
cement board screws—to the front sheet
metal face of the heater
in indicated areas
only
. Maximum recommended screw
length: 1-1/4”. Pre-drill cement board with
oversized holes and do not over-tighten
screws to avoid cracking due to heat
expansion.
Standard gypsum wall board may be used
beyond the perimeter of the cement board.
Finishing around trims
Additional non-combustible material such
as tile, etc., may be applied over top of the
wall surface or you may choose to leave it
fi
nished clean with no tile, etc. Be aware
that a trim is always required and that only
the wider 1750 style trim will accept tile,
etc. tucked behind it (up to 1 inch thick).
Additional non-combustible
fi
nishes may
be butted up to the narrow 1755 trim or the
1770RCS GRC trim but
should not cover
these trims.
Wider trim (1750)
can adjust up to 1” off
surface of cement board
Wider trim (1770)
mounts directly over
the cement board
Narrow trim (1755)
mounts directly over
the cement board
Minimum cement board dimensions
QUALIFIED
INSTALLER