9. Clearances to Combustible Material
When the insert is installed so that its surfaces are at or beyond the minimum clearances
specified, combustible surfaces will not overheat under normal and even abnormal operating
conditions.
NO PART OF THE INSERT MAY BE LOCATED CLOSER TO THE COMBUSTIBLE THAN THE
MINIMUM CLEARANCE FIGURES GIVEN.
9.1
Installation of a Combustible Mantel Shelf
It is possible to install a combustible shelf with a maximum depth of 12" (305 mm) at a height of
at least 27" (686 mm) above the insert. At a height of more than 27" (686 mm), the shelf must
still have a maximum depth of 12" (305 mm).
Table 2 : Mantel Shelf Clearances
MAXIMUM
MANTEL SHELF
DIMENSION (X)
12" (305mm) max.
9.2
Floor Protection
It is necessary to have a floor protection made of non-combustible materials that meets the
measurements specified in the
Table 3 : Floor Protection
FLOOR PROTECTION
Canada
B
18" (457 mm)
M
8" (203 mm)
N
N/A
From door opening. The depth of the hearth extension in front of the insert is included in the calculation of the floor protector's dimensions. The
1
masonry hearth should be at least 4" (102 mm) higher than the combustible floor in front of it and a floor protection must extend at least 16" (406
mm USA) and at least 18" (457 mm Canada) without an R value. If the hearth elevation is lower than 4" (102 mm), the non-combustible (B) floor
protector in front of the insert should have an R value equal or greater than 1.00 and shall extend 22" (560 mm) in front of the unit.
Page 30
MANTEL SHELF
CLEARANCES (I)
27" (686 mm) min.
«Table 3 : Floor Protection»
USA
16" (406 mm)
1
1
N/A
8" (203 mm)
X
I
Figure 21: Shelf Clearances
below.
B
N
Figure 22: Floor Protection
M
DOOR