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A. Chimney Requirements
Measure vertical distances from the base of the fi replace
as shown in Figure 8.2.
• Minimum overall straight height
• Minimum height with offset/return
• Maximum height
• Maximum chimney length between an offset
and return
• Maximum distance between chimney
stabilizers
• Maximum unsupported chimney length
between the offset and return
• Maximum unsupported chimney height above
the fi replace
• Maximum unsupported chimney above roof
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 fi re.
Table 8.1
HEIGHT OF CHIMNEY COMPONENTS
Chimney Stabilizer
SL11
Ceiling Firestops
FS538
FS540
Offsets/Returns
SL1130
Roof Flashing
RF570
RF571
Chimney Sections*
SL1106
SL1112
SL1118
SL1136
SL1148
* Dimensions refl ect effective height.
18 ft
(5.5 m)
18.5 ft
(5.64 m)
90 ft
(27.43 m)
20 ft
(6.1 m)
35 ft
(10.67 m)
6 ft
(1.83 m)
35 ft
(10.67 m)
6 ft
(1.83 m)
in.
mm
4-3/4
121
0
0
0
0
18
457
0
0
0
0
4-3/4
121
10-3/4
273
16-3/4
425
34-3/4
883
46-3/4
1187
Heat & Glo • RUTHERFORD-36 • 4059-341 Rev D • 03/09
Determine the chimney components needed to complete
your particular installation:
•
Measure the total vertical height of the fi replace installation
from the base of the fi replace assembly to the approximate
location of the bottom of the termination cap.
•
Subtract the effective height of the fi replace 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 identifi es those components and where used.
•
Install a ceiling fi restop whenever the chimney penetrates
a fl oor/ceiling.
NOTICE: A maximum of one offset and return may be
used.
CAUTION! Risk of Fire and/or Asphyxiation! DO NOT
connect this fi replace to a chimney fl ue servicing another
appliance. Do NOT connect to any air distribution duct
or system. These actions could cause overheating/fi re
in the chimney fl ue, or release of exhaust fumes into the
living areas.
20 ft (6.10 m) max.
pipe between an
offset & return
Ceiling firestop
74 1/8 in.
(1884 mm)
Effective
Height
Figure 8.2
Chimney Requirements
6 ft (1.83 m) max.
unsupported chimney
above roof
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
25
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