Heat & Glo LifeStyles Collection • Montana-42C • 4039-155 Rev D • 03/06
15
A. Chimney Requirements
Vertical distances are measured from the base of the fi re-
place as shown in Figure 5.2.
To determine the chimney components needed to complete
your particular installation, follow the steps below:
• Determine the total vertical height of the fireplace
installation. This dimension is measured from the base of
the fi replace assembly to the point where the smoke exits
the termination cap.
•
Subtract the effective height of the fi replace assembly from
the overall height of the fi replace installation (measured
from the base of the fireplace to the bottom of the
termination cap).
• Refer to Table 5.1 to determine what components must
be selected to complete the fi replace installation.
• Determine the number of ceiling fi restops, stabilizers,
roof flashing, etc. required to complete the fireplace
installation.
Table 5.1
• Do NOT connect this fireplace to a chimney flue
servicing another appliance.
• Do NOT connect to any air distribution duct or
system.
CAUTION
Fire Risk
•
Must maintain 2 in. (51 mm) air clearance
to insulation and other combustible
materials.
WARNING
Note:
A maximum of two pairs of offsets and returns may
be used.
5
5
Chimney Assembly
HEIGHT OF CHIMNEY COMPONENTS
in.
mm
Chimney Stabilizer
SL4
4-3/4
121
Ceiling Firestops
FS538
0
0
FS540
0
0
Offsets/Returns
SL430
14-1/2
368
Roof Flashing
RF570
0
0
RF571
0
0
Chimney Sections*
SL406
4-3/4
121
SL412
10-3/4
273
SL418
16-3/4
425
SL436
34-3/4
883
SL448
46-3/4
1187
* Dimensions refl ect effective height.
ft
m
• Minimum overall straight height
14
4.27
• Minimum height with offset/return
16
4.88
• Maximum height
90
27.43
• Maximum chimney length between an offset
and return
20
6.1
• Maximum distance between chimney
stabilizers
35
10.67
• Double offset/return minimum height
24
7.32
• Maximum unsupported chimney length
between the offset and return
6
1.83
• Maximum unsupported chimney height above
the fi replace
35
10.67
• Minimum overall straight height if fi replace is
freestanding
6.33
1.93