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Installation Planning
Material Specifi cations
Non-Combustible
Material which will not ignite and burn. Such materials
are those consisting entirely of steel, iron, brick, tile,
concrete, slate, glass or plasters, or any combination
thereof.
Materials that are reported as passing ASTM E 136,
Standard Test Method for Behavior of Materials in a
Vertical Tube Furnace at 750°C shall be considered
non-combustible materials.
Combustible
Materials made of or surfaced with wood, compressed
paper, plant fi bers, plastics, or other material that
can ignite and burn, whether fl ame proofed or not,
or plastered or unplastered shall be considered
combustible materials.
Minimum Non-Combustible Board Dimensions
Minimum coverage area of non-combustible board.
Any wall finish applied to shaded area must be non-combustible.
Non-combustible
board required
thickness:
1/2 inch (13 mm)
Min. 58" (1473 mm)
D
D
A
B
C
With 2775LFB trim
inches [mm]
A
Min. 20-1/2 [521]
B
19-5/8 [498]
C
Min. 8-11/16 [221]
D
Min. 4 [102]
E
Min. 49-13/16 [1265]
Non-Combustible Board
The LT2 Linear fi replace requires a 1/2" (13 mm) thick
non-combustible board to be used as a wall surface
immediately surrounding the unit's opening—see
diagram for minimum coverage. This is not included
with the appliance.
Extending the non-combustible board well beyond
the minimum shown will help avoid cracking due to
diff erential expansion of materials.
Pre-drill non-combustible 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 non-combustible board.
E
With 2730CIK trim
Min. 20-1/8 [511]
21 [533]
Min. 8 [203]
Min. 3-3/8 [84]
Min. 51 [1296]
Wall Finish
D
LT2 fireplace outline
(including stand-offs)
Joints preferred at corners
to prevent cracking
(see page 17)
Flush with bottom of unit;
add extra cement board
if overlapping framing.
15
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