Vermont Casting NVBC42 Clearance to Combustibles, Mantels, Hearth, Insulating For Cold Climates

NVB Series B-Vent Gas Fireplace

Clearance to Combustibles

Appliances
Top	0” (0 mm)
Bottom	0” (0 mm)
Side	0” (0 mm)
Back	0” (0 mm)
Perpendicular Sidewall	0” (0 mm)
Top of unit to ceiling	36” (914 mm)
Front of unit to combustibles	36” (914 mm)
Venting
B-Vent	1” (25 mm)

Mantels\

The height that a combustible mantel is fitted above the fireplace is dependent on the depth of the mantel. This also applies to the distance between the mantel leg (if fitted) and the fireplace.

For the correct mounting height and widths refer to Figures 5a and 5b

The distances and reference points are not affected by the fitting of a bay window front trim kit.

Noncombustible mantels and legs may be installed at any height and width around the appliance.

When using paint or lacquer to finish the mantel, such paint or lacquer must be heat resistant to prevent discoloration.

Side View							V
							W
							X
							Y
			A	B	C		Z
						D	E
									Fireplace
									Top of Combustion
									Chamber
										CFM146
Ref.		Mantel					Ref.		Mantel From Top
		Shelf Depth							of Comb. Chamber
V		14" (356 mm)					A	18"		(457 mm)
W		12" (305 mm)					B	16"		(406 mm)
X		10" (254 mm)					C	14"		(356 mm)
Y		8" (203 mm)					D	12"		(305 mm)
Z		1¹⁄₂" (38 mm)					E	8"		(203 mm)
Fig. 5a	Mantel clearances.

J	I H
		G

	Black Sur-							F
		Mantel
	round Face
CFM164		Leg
							K
	Side of					L
					M
	Combustion Chamber
				N
			O

						CFM170
Ref.		Mantel		Ref.	Mantel Leg From
		Leg Depth			of Comb. Opening
F		14" (356 mm)		K	14"	(356 mm)
G		12" (305 mm)		L	12"	(305 mm)
H		10"	(254 mm)	M	10"	(254 mm)
I		8"	(203 mm)	N	8"	(203 mm)
J		1¹⁄₂" (38 mm)		O	1¹⁄₂"	(38 mm)
Fig. 5b	Combustible mantel leg minimum installation.

Hearth

A hearth is not mandatory but is recommended for aesthetic purposes. We recommend a noncombustible hearth.

Insulating For Cold Climates

When an appliance is installed in a chase or an outside wall, the enclosure should be insulated like any other wall of the home. Insulation should be installed under the appliance and on the inside of the exterior walls.

In a chase, it is a good idea to install a firestop at the first ceiling level above the appliance. Also, install insu- lation on the side walls. Insulation may then be placed above the ceiling to assure the space around the appli- ance is protected. Refer to Page 8, Figure 7.

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