Hearth and Home Technologies BIR50-B owner manual Sidewalls/Surrounds, Frame the Fireplace

C. Sidewalls/Surrounds

•Locate adjacent combustible sidewalls a minimum of 24 in. (610 mm) from fireplace opening.

•Combustible and non-combustible mantel legs, surrounds and stub walls may be constructed per Figure 6.3.

Note: Grid depicts 1 inch squares.

FLUSH FRONT

BRICK	4 in.
	[102 mm]
FRONT

22 3/8 in.

[568 mm]

50° angle

18 1/2 in.

[470 mm]

24 in. [610 mm]

50in.

60-7/8 in.

39° angle

24 in. [610 mm]

19 3/4 in.

[500 mm]

Figure 6.3 Combustible 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 6.2.

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

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

E

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

The fireplace header cannot be positioned until after the fireplace assembly is in place.

Header MUST NOT be notched!

C

B

D A

D

D = extra space needed for outside air connection.

If outside air duct has no bend, this dimension may be reduced as long as minimum clearances are met.

Model #		A	B *	C **	D	E min.
BIR-50	in.	61 7/8	28 3/8	74 1/2	12	21
	mm	1572	721	1892	305	533

Figure 6.4 Framing the Fireplace	* If interior of chase will be drywalled, add the thickness to this meaurement.
	** Adjust header height for raised floor under fireplace.

20 Heatilator • Birmingham BIR50-B • 4059-682C • 8/12