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QUALIFIED
INSTALLER
Plan Wall Finish
Non-combustible cement board
The L1 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 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, etc.—see page 35.
Be aware that a trim is always required and
that only the 1555 and 1550 style trims will
accept tile, etc. tucked behind them (up
to 5/8" thick for the 1555 and up to 1 inch
thick for the 1550). Finish should not cover
the trims.
Wider trim (1550) can
adjust up to 1" forward of
surface of cement board
34
Installation
(1130 mm)
Minimum cement board dimensions
1 /
( 2
4 "
3 5
m
m
P o
)
s s i
( i n
b l e
t h
s c r
e d
e s
i g n
Gypsum board
up to perimeter
of cement board
Min.
20-1/2"
(521 mm)
Min.
44-1/2"
14-3/4"
(375 mm)
Min.
9-1/4"
(235 mm)
Board flush with
bottom of heater;
add extra if
overlapping
framing.
Note: When installing the 1555 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)
o f
o v
e w
l o c
a t e
d
Narrow trim (1555) can
adjust up to 5/8" forward of
surface of cement board
Min. 48"
(1219 mm)
40"
(1016 mm)
1/4" (7 mm)
1" (25 mm)
1-3/4" (45 mm)
1/2" (13mm) thick
non-combustible
cement board
a r d
f l u
h e
s h
a t e
e r l
w i
r ; a
a p
t h
d d
p i n
b o
e x
g f
t r a
r a m
i n g
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