Drain Pan DP36, Hearth Extension, Mantels

Fireplace Installation

Continued

Drain Pan (DP36)

For outdoor installations, the fireplace enclosure must allow for adequate drainage and fresh air ventilation. It is recommended that a sealed, corro- sion resistant catch pan with provision for drainage be installed under the fireplace within the fireplace enclosure (see Accessories on page 16).

Hearth Extension

A hearth extension projecting a minimum of 16" in front of and a minimum of 8" beyond each side of the fireplace opening is required to protect combustible floor construction in front of the fire- place. Fabricate a hearth extension using a material which meets the following specifications: a layer of noncombustible, inorganic material having a thermal conductivity of K=0.84 BTU IN/FT, HR. F (or less) at 1" thick. For example, if the material selected has a K factor of 0.25, such as glass fiber, the following formula would apply:

0.25x 1.0" = 0.30" thickness required

Thermal conductivity "K" of materials can be obtained from the manufacturer or supplier of the noncombustible material. If the hearth extension is to be covered, use noncombustible material such as tile, slate, brick, concrete, metal, glass, marble, stone, etc. Provide a means to prevent the hearth extension from shifting and seal gap between the fireplace frame and hearth extension with a non- combustible material (see Figure 3).

WARNING: Hearth extension

is to be installed only as shown

in Figure 3.

Seal Gap

Fireplace Front

Ember Protector

Fireplace Front
Raised Hearth
Ember Protector	Hearth
	Hearth
	Extension
Fireplace Front	Seal Gap
Elevated

Ember Protector

Figure 3 - Hearth Extension

Mantels

A mantel may be installed if desired (see Figure 4). Woodwork such as wood trims, mantels or any other combustible material projecting from the front face must not be placed within 12" of the fireplace opening. Combustible materials above 12" and projecting more than 11/2" from the fireplace must not be placed less than 15" from the top opening of the fireplace (NFPA STD 211, Sec. 7-3.3.3).

Mantels or any other combustible material also may come up to the side edge of the black metal face of the fireplace just as long as the projection from the front face fall within the limit shown in Figure 4.

		Combustible
	12 1/4" Ref.	Material
		Safe
6"		Zone for
Ref.	33°	Projection of
	33°	Combustible
		Combustible
	3" Nom.	Materials
	3" Nom.
12" Min.	11/2" Max.
9" Min.		Upper
		Section of
		Fireplace
	Fireplace
	Opening

	Top View of Fireplace
		FIREBOX
	8.0"
		2" Max.
	SAFE ZONE	3.0"
	33°	3.0"
	33°
	Min. to
	Perpendicular	Combustible
	Side Wall	Material Must
	12"	Not Overlap
		Front Face

Figure 4 - Mantel Clearances to

Combustible Material

111026-01C

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VS36H(1), S36H, VS36(1), S36RH, S36 specifications

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