Hearth and Home Technologies EL36 Series Raised Hearth Extension Framing, Minimum between

Model #	A	B	C	D
in.	36	52	8	16
EL36	914	1321	203	406
mm
in.	42	66	12	20
EL42	1067	1676	305	508
mm
4 in. (102 mm)
minimum between
bottom of fireplace opening
and finished surface of hearth extension
C
	A
B			C
				D
Figure 11.1 Hearth Extension Dimensions
Continuous, non-				Fireplace
combustible sealant				Opening

1/2 in. Micore Hearth	Tile, stone or other
Extension (or	non-combustible material		4 in.
equivalent insulation)			(102 mm) min.
See Table 11.2.
Floor constructed of wood or		2 in. (51 mm) of the Protective
		Metal Hearth Strip is required
other combustible material		under the front of the fireplace

Figure 11.2 Hearth Extension Construction

Raised Hearth Extension Framing

WARNING! Risk of Fire. A raised hearth extension built flush with the fireplace opening (Figure 11.3) or less than 4 in. (102 mm) below the fireplace opening requires the fireplace be installed on a non-combustible surface.

The hearth framing must be constructed of non-combus- tible materials (Figure 11.2) and placed on 1/2 in. Micore, or equivalent material (Figure 11.4). When creating the platform, allow for the thickness of the non-combustible finishing materials (Figure 11.5).

IMPORTANT! Hearth extension design must be determined before installation of fireplace.

Noncombustible

Material

Noncombustible

Finishing Material

Noncombustible

Framing Material

1/2 in. Micore
	Protective Metal	Floor
or equivalent
	Hearth Strips
insulation

Figure 11.3 Raised Platform Hearth Extension Detail

Noncombustible

Framing Material1/2 in. Micore or equivalent insulation

Figure 11.4 Raised Platform Hearth Extension-Framing Materials

Heatilator • EL36/EL42 • 4044-132 • Rev V • 11/08 39