Heatilator Birmingham BIR36-B Installation Manual page 12

D. Frame the Fireplace
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17 in.
(432 mm)
framing
C
B
Figure 3.5 Framing the Fireplace
12
A
D
Model #
BIR36
* If interior of chase will be drywalled, add the thickness to this measurement.
** Adjust header height for raised floor under fireplace.
Heatilator • Birmingham 36-B Installation Manual • 4059-709 • Rev AB • 06/23
WARNING! Risk of Fire!
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• A minimum 1-1/2 in. (38 mm) air clearance must be
maintained at the back and sides of the fireplace
assembly.
• Chimney sections at any level require a 2 in. (51 mm)
minimum air space clearance between the framing and
chimney section.
WARNING! Risk of Fire!
minimum air space clearances to combustibles. DO NOT
pack required air spaces with insulation or other materi-
als.
CAUTION! Risk of Cuts/Abrasions. Wear protective gloves
and safety glasses during installation. Sheet metal edges
are sharp.
1/2 in.
(13 mm)
Framing must be extended straight up 84 in.
(2134 mm) from the base of the fireplace.
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
A
in. 47 7/8
mm 1216
Comply with all minimum clear-
You must comply with all
Fireplace must be set out
1/2 in. (13 mm) in front of
the face of the framing
material.
B * C **
28 1/2 74 1/4
724 1886
D
12
305