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4.3 Hearth and floor protection requirements:
The floor in front of the fireplace needs thermal protection of ¾ inch (19 mm) thick mineral fiber
millboard with a value of k=0.84 BTU/IN FT
2
HR
o
F when the floor is level with bottom opening
of the fireplace extending out 24 inches (610 mm).
If the floor is 3½ inches (89 mm) below the level of the fireplace, the k=0.84 thermal protection
only needs to be ½ inch (12.5 mm) thick extending out 24 inches (610 mm).
If the floor is a full 7 inches (178 mm) below the bottom opening of the fireplace, the floor only
needs to be covered with non-combustible material, minimum ⅜ inch (10 mm) thick extending
out 18 inches (455 mm).
To substitute alternate insulation material, you need to know the “k” factor for that material. To
calculate the required thickness for the alternate material; use the following formula.
Example: “k” value of brick = 5
4.3.1 Minimum Clearances:
Masonry
Fireplace
WARNING
: Minimum clearance to combustibles must be observed when installing this
fireplace. The listed clearances for your SCAN DSA fireplace are determined in laboratory tests.
A = Sidewall to insert 12" / 305 mm
B = Mantel to insert
with mantel shield 18" / 455 mm
C = Top facing 11" / 280 mm
D = Side facing 4" / 100 mm
E = Hearth (Front) USA 16" / 405 mm
E = Hearth (Front) Canada* 18" / 455 mm
F = Hearth 8" / 200 mm
Of alternate material.
thickness of alternate
material in inches.
__”K”__
0.45
* 0.50 =
5.5 inches of brick is required to meet
the requirement.
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