Hearth and Home Technologies ST42A owner manual Finishing Material, Glass Doors, Mantel

B. Finishing Material

•Combustible Material

Material which is made of or surfaced with wood, compressed paper, plant fi bers, plastics, or any material capable of igniting and burning, whether fl ame proofed or not, plastered or not plastered.

•Non-Combustible Material

Material which will not ignite and burn. Such materials are those consisting entirely of steel, iron, brick, tile, concrete, slate, glass or plasters, or any combination thereof.

•Non-Combustible Sealant Material

Sealants which will not ignite and burn: Rutland, Inc. Fireplace Mortar #63 (or equivalent).

After completing the framing and applying the facing material (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 fi replace and facing to prevent cold air leaks. Large gaps can be bridged with fi berglass rope gasket.

Only non-combustible materials may be used to cover the metal fi replace fronts.

WARNING

Fire Risk

Do NOT obstruct air inlet or outlet grilles.

Do NOT modify grilles.

•Modifying or covering grilles could cause temperature rise and fi re hazard.

Finishing materials must not interfere with:

•Air fl ow through grilles or louvers

•Operation of louvers or doors

•Access for service

D.Sidewalls/Surrounds

Adjacent combustible side walls must be located a minimum of 12 in. (305 mm) from the fi replace opening. If you are us- ing a decorative surround constructed of combustible ma- terial, it must be located within the shaded area defi ned in Figure 8.5. Short stub walls are also acceptable if they are contained within the shaded area.

	E. Glass Doors
WARNING
	This fi replace has been tested and listed for use with doors
	as specifi ed in Section 12.B. Fireplace Components. Please
Fire Risk
	refer to the manual packed with each set of doors for instal-
• Use only non-combustible material below	lation instructions.
standoffs.

•Material such as cement board is

	acceptable.		WARNING
C. Mantel		Fire Risk
		Finish all edges and fronts to clearances and
A combustible mantel may be positioned no lower than
		specifi cations.
12 in. (305 mm) above the top of the fi replace openings. The
		•	Metal fi replace front may be covered with
combustible mantel may have a maximum depth of 12 in.
			non-combustible material only.
(305 mm). Combustible trim pieces that project no more than
		• Do NOT overlap combustible materials onto
1 in. (25 mm) from the faces of the fi replace can be placed
			fi replace fronts.
no closer than 6 in. (152 mm) from the top of the fi replace
		• Install combustible materials up to specified
openings. See Figure 8.4. Combustible trim must not cover
			clearances on top, front and side edges.
the metal surfaces of the fi replace. This mantel clearance is
		•	Seal joints between the fi nished wall and
in accordance with Section 7-3.3.3 of ANSI/NFPA211.
			fi replace top and sides using only a 300° F
			minimum sealant.

12 in.			￿
(305 mm)			14-3/8 in.	Flush		Brick	4 in.
max.							(102 mm)
			(365 mm)	Front		Front
					42 in.		9-3/4 in.
					(1067 mm)
			50 deg.				(248 mm)
					(opening)
	12 in.						37 deg.
					48 in.
	(305 mm)	Gas
					(1219 mm)
	min.	Knockout			(framing)
				12 in.		12 in.
				(305 mm)		(305 mm)
Figure 8.4	Mantel Specifications		Figure 8.5	Sidewalls/Surrounds
		Heatilator • ST42A • 35038 Rev G • 02/05					25