Hearth and Home Technologies RH-36 Series Sidewalls/Surrounds, Frame the Fireplace, Outside Di

C. Sidewalls/Surrounds

•Adjacent combustible sidewalls must be located a minimum of 12 in. (305 mm) from the fireplace opening.

•Combustible and noncombustible mantel legs, surrounds and stub walls may be constructed within the gridded area, Figure 6.3.

	FLUSH
	FRONT
11 1/4 in.				A
			angle
[286 mm]		50°		B

12 in.

[305 mm]

		FRONTBRICK		4 in.
			[102 mm]
					9 3/4 in.
	39°
				[248 mm]
		angle
								A	B
								Fireplace	Outside Di-
	12 in.					Model #		Opening	mensions
							in.	36	41
[305 mm]						RH-36
							mm	914	1041
						RH-42	in.	42	47
							mm	1067	1194

Figure 6.3 Mantel Leg or Wall Projections (Acceptable on both sides of opening)

D. Frame the Fireplace

Figure 6.4 shows typical framing using combustible materials (2x4 lumber shown).

•Observe all required air space clearances to combustible materials as shown in Figure 6.1 & 6.2.

•Framing across the top of fireplace must be above top standoffs.

2 in. (51 mm) min. air space clearance from chimney.

Note: Framing must be extended straight up, all the way to the ceiling.

		Header MUST NOT be notched!
		D = extra space needed for outside air connection.
C		If outside air duct has no bend, this dimension may be
		reduced as long as minimum clearances are met.
		D
B	A		Model		A	B*	C**	D
			RH-36	in.	42	21 1/2	39 3/4	8
				mm	1067	546	1010	203
			RH-42	in.	48	21 1/2	39 3/4	8
				mm	1219	546	1010	203

* If interior of chase will be drywalled, add the thickness to this measurement.

** Adjust header height for a raised floor under fireplace.

Figure 6.4 Framing the Fireplace

20 Heat & Glo • RH-36/RH-42 • 4044-153 • Rev W • 11/08