60-7/8 in.
50 in.
18 1/2 in.
[470 mm]
19 3/4 in.
[500 mm]
4 in.
[102 mm]
50° angle
39° angle
24 in.
[610 mm]
BRICK
FRONT
FLUSH
FRONT
24 in.
[610 mm]
22 3/8 in.
[568 mm]
Note: Grid depicts 1 inch squares.
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B
C
A
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
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.
D
E
A
B *
C **
D
E min.
in.
61 7/8
28 3/8
74 1/2
12
21
mm
1572
721
1892
305
533
Model #
** Adjust header height for raised floor under fireplace.
BIR-50
* If interior of chase will be drywalled, add the thickness to this meaurement.
The header cannot be positioned until
after the fireplace assembly is in place.
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