Hearth and Home Technologies BIR42-B - Manual (Page 25)

25
A. Chimney Requirements
Measure vertical distances from the base of the fireplace
as shown in Figure 8.2.
20 ft (6.10 m) max.
pipe between an
offset & return
Ceiling firestop
35 ft (10.7 m)
max. straight
unsupported
chimney height
18.5 ft (5.64 m)
min. height
single offset-return
90 ft (27.4 m)
max. height
6 ft (1.83 m) max.
unsupported chimney
above roof
97 1/2 in.
(2477 mm)
Effective
Height
14-11
Transition
Figure 8.2 Chimney Requirements
Table 8.1
WARNING! Risk of Fire! You must maintain 2 in. (51 mm)
air space clearance to insulation and other combustible
materials around the chimney system. Failure to do so may
cause overheating and fire.
Determine the chimney components needed to complete
your particular installation:
• Measure the total vertical height of the fireplace installation
from the base of the fireplace assembly to the approximate
location of the bottom of the termination cap.
• Subtract the effective height of the fireplace assembly (see
Figure 8.2) from the total vertical height to determine the
overall height of the chimney installation.
• Create a schematic for your application similar to Figure
8.2 showing components required (referring to Table 8.1).
Figure 8.1 identifies those components and where used.
• Install a ceiling firestop whenever the chimney penetrates
a floor/ceiling.
NOTICE: A maximum of one offset and return may be
used.
CAUTION! Risk of Fire and/or Asphyxiation! DO NOT
connect this fireplace to a chimney flue servicing another
appliance. DO NOT connect to any air distribution duct
or system. These actions could cause overheating/fire
in the chimney flue, or release of exhaust fumes into the
living areas.
• Minimum overall straight height 18 ft (5.5 m)
• Minimum height with offset/return 18.5 ft (5.64 m)
• Maximum height 90 ft (27.43 m)
• Maximum chimney length between an offset
and return
20 ft (6.1 m)
• Maximum distance between chimney
stabilizers
35 ft (10.67 m)
• Maximum unsupported chimney length
between the offset and return
6 ft (1.83 m)
• Maximum unsupported chimney height above
the fireplace
35 ft (10.67 m)
• Maximum unsupported chimney above roof 6 ft (1.83 m)
Heatilator • Birmingham BIR42-B • 4059-681C• 9/12
HEIGHT OF CHIMNEY COMPONENTS in. mm
Chimney Stabilizer
SL11 4-3/4 121
Ceiling Firestops
FS538 0 0
FS540 0 0
Offsets/Returns
SL1130 18 457
Roof Flashing
RF570 0 0
RF571 0 0
Chimney Sections*
SL1106 4-3/4 121
SL1112 10-3/4 273
SL1118 16-3/4 425
SL1136 34-3/4 883
SL1148 46-3/4 1187
* Dimensions reflect effective height.