Hearth and Home Technologies C-40 warranty Position the Hearth Extension Finishing Material

C. Position the Hearth Extension		D. Finishing Material
	Position and secure the hearth extension over the protective		Do not install combustible materials over the metal
	metal strips that have been placed partially under the fireplace		fireplace face of the fireplace! This poses a safety
	front. These strips should be protruding approximately 2 in.		hazard and may start a fire. You may only use non-
	(51 mm) from under the fireplace front and 2 in. (51 mm) on		combustible material over the metal face of the fireplace.
	both sides of the fireplace opening. See Figure 18.1 on page		NOTE: The decorative fascia must be removable for
	18. Seal the crack between the hearth extension and		future serviceability of the Automatic Combustion
	fireplace with a bead of non-combustible sealant. See		Control.
	Figure 41.1. Apply a non-combustible finishing material of	•	Combustible Material
	your choice to the hearth extension.
			Materials made of or surfaced with wood, compressed
	NOTE: SEE PAGES 10-12 & 38 “CLEARANCES TO COM-		paper, plant fibers, plastics, or other materials that can
			ignite and burn, whether flame proofed or not, or whether
	BUSTIBLES, HEARTH EXTENSIONS / FLOOR PROTEC-
			plastered or un-plastered shall be considered combus-
	TION” FOR CLEARANCES REQUIRED FOR DIFFERENT
			tible materials.
	HEARTH EXTENSION INSTALLATIONS. THE CLEAR-
	ANCES MUST BE STRICTLY ADHERED TO.	•	Non-Combustible Material
			Materials which will not ignite and burn. Such materi-
	WARNING		als are those consisting entirely of steel, iron, brick, tile,
			concrete, slate, glass or plasters, or any combination
	Fire Risk		thereof.
			Materials that are reported as passing ASTM E 136, Stan-
	• Hearth extensions are to be installed only
	as illustrated to prevent high temperatures		dard Test Method for Behavior of Materials, in a Vertical
	from occurring on concealed combustible		Tube Furnace at 750°C, shall be considered non-com-
	materials.		bustible materials.

• Hearth sealing strips prevent burning or		•	Non-Combustible Sealant Material
hot particles from inadvertently falling			Sealants which will not ignite and burn: Super Calstick
directly on combustible surfaces in the
event the building should settle and		After completing the framing and applying the facing material
disturb the original construction.
		(drywall) over the framing, a bead of non-combustible seal-
		ant must be used to close off any gaps at the top and sides
		between the fireplace and facing to prevent cold air leaks.
		Large gaps can be bridged with fiberglass rope gasket.
		Only non-combustible materials may be used to cover the
		metal fireplace front.
		• Cardboard OR Metal Template
			A cardboard template of the front is printed on the outside
			of the shipping box. It measures 1/8 in. (3 mm) bigger all
			the way around than the actual front. Cut out the template
			along the outside of the line for use in your installation.
			A metal template is also available for more durable
			continued use remaining accurate over time. (See page 66.)
				WARNING
			Fire Risk
			•	Maintain clearances.
			• Use only non-combustible material below
				standoffs, material such as cement board is
Seal with				acceptable.
non-combustible			• Framing or finishing material used on the front of, or
sealant			in front of, the appliance closer than the minimums
Figure 41.1 Position the Hearth Extension			listed, must be constructed entirely of noncombustible
			materials (i.e., steel studs, concrete board, etc.).
November 11, 2008	Heatilator • Constitution EPA Fireplace • 480-1091C				Page 41