Heatilator CONSTITUTION C-40 Owner's Manual page 39

WARNING
Fire Risk
• Metal hearth strips MUST be installed.
Sparks or embers may ignite flooring.
Metal strips 2 in. (51mm) under edge of
Fireplace and Hearth Extension and 2 in.
(51mm) on both side of fireplace opening.
Nail or screw metal strips in place.
Figure 39.1 Positioning the Protective Metal Hearth Strips
The construction of, and materials used for a hearth exten-
sion are shown in Figures 39.2 and 39.3. A hearth extension
of this construction may be covered with any non-combustible
decorative material and may have a maximum thickness as per
Figure 38.1 on page 38. Seal gaps between the hearth exten-
sion and the front of the fireplace with a bead of non-combus-
tible sealant.
1. Fireplace and Hearth Extension are flush on the
floor:
Non-combustible flooring 20 in. (508mm) in front of and 8 in.
(203mm) to either side of the fuel opening with a minimum
thickness of 1 in. (25mm) and ("k" value = 0.49). See Figure
39.2 and 39.3 and Figures 40.1 and 40.2 on page 40.
NONCOMBUSTIBLE
DECORATIVE MATERIAL
1/2 in. (13mm)
Figure 39.3 Side View of Factory Built Hearth Extension
November 11, 2008
1in. (25mm) OVERLAP
(2) HX4 MICORE FACTORY
BUILT HEARTH EXTENSION
(Each HX4 = 1/2 in. (13mm) thick)
Heatilator • Constitution EPA Fireplace • 480-1091C
Fire Risk
• Hearth extensions must be installed
exactly as specified.
High temperatures or hot embers may ignite
concealed combustibles.
B
Model #
Constitution
Figure 39.2 Hearth Extension Dimensions
2. Fireplace is installed flush on the floor and Hearth
Extension is raised to the bottom of the fascia:
Raised hearth must be constructed of non-combustible
materials such as cement block or equivalent material. Non-
combustible flooring on the raised hearth must be 20 in. (508
mm) in front of and 8 in. (203 mm) to either side of the fuel
opening with a minimum thickness of 1 in. (25 mm) and ("k"
value = 0.49). See Figure 40.3 on page 40.
GAP (SEAL WITH NONCOMBUSTIBLE SEALANT)
UP TO BOTTOM OF FASCIA
HEARTH METAL STRIPS
WARNING
8 in. (203mm)
from each side of
fuel loading door
A
A
in. 41 20
1041 508
mm
6 in. (152mm)
B
Page 39