37
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)
Board flush with
bottom of heater;
add extra if
overlapping
framing.
50”
(1270 mm)
Min. 60”
(1524 mm)
1-3/4” (45 mm)
1” (25 mm)
1/4” (7 mm)
Note:
When installing the
1755 1” trim
,
allow space for the barrier screen lower
tabs by notching the cement
board/wall finish at the bottom
of the opening (same dimensions
on both sides)
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
Installation
Plan Wall Finish
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.
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.
Non-combustible
fi
nishing over
cement board
Additional non-combustible material such
as tile, etc., may be applied over top of the
cement board or you may choose to leave
it
fi
nished clean with no tile—see page 38.
Be aware that a trim is always required and
that only the 1755 and 1750 style trims will
accept tile, etc. tucked behind them (up to
5/8” thick for the 1755 and up to 1 inch thick
for the 1750). Additional non-combustible
fi
nishes, if desired, may be butted up to the
concrete trim 1770RCS. Finish
should not
cover
the trims.
Wider trim (1770)
mounts directly over
the cement board
Minimum cement board dimensions
Wider trim (1750) can
adjust up to 1” forward of
surface of cement board
Narrow trim (1755) can
adjust up to 5/8” forward of
surface of cement board
QUALIFIED
INSTALLER
