HearthStone Green Mountain Insert 70 - Installation of a Combustible Mantel Shelf; Hearth Requirements & Floor Protection

Hearthstone Quality Home Heating Products, Inc ® Green Mountain Insert 70 (Model 8450)
10
INSTALLATION OF A COMBUSTIBLE
MANTEL SHELF
It is possible to install a combustible shelf with a
maximum depth of 12" at a height of at least 27"
above the insert. At a height of more than 27", the
shelf must still have a maximum depth of 12".
Figure 3 – Mantel Shelf
HEARTH REQUIREMENTS & FLOOR
PROTECTION
Ensure you protect combustible flooring with a
covering of noncombustible material. The minimum
floor protection must be met under the fireplace
insert and extend beyond the fireplace insert as
follows:
FLOOR PROTECTION
Canada
USA
B
18" (457 mm)
1
16" (406 mm)
1
M
8" (203 mm)
N/A
N
N/A
8" (203 mm)
Figure 4 – Hearth Requirements
1
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 masonry hearth should be at
least 5" (127 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 5" (127
mm), the non-combustible floor protector in front of the
insert should have an R value equal or greater than 1.00
and shall extend 23" (584 mm) in front of the unit.
MAXIMUM MANTEL
SHELF DIMENSION (X)
MANTEL SHELF
CLEARANCES (I)
12" (305 mm) max.
27" (686 mm) min.