Heat & Glo • RHW-485 • 33221 Rev O • 08/06
17
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.
6 ft (1.8 m) max.
unsupported
run
20 ft (6.10 m) max.
pipe between an
offset & return
Ceiling firestop
35 ft (10.7 m)
max. straight
unsupported
chimney height
16.5 ft (5.03 m) min. height/single offset-return
20 ft. (6.10 m) min. height/double offset-return
90 ft (27.4 m) max. height
6 ft (1.83 m) max.
unsupported chimney
above roof
41-1/4 in.
(1048 mm)
Effective
Height
Figure 5.2 Chimney Requirements
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
HEIGHT OF CHIMNEY COMPONENTS
in.
mm
Chimney Stabilizer
SL3
4-3/4
121
Ceiling Firestops
FS338
0
0
FS339
0
0
FS340
0
0
Offsets/Returns
SL315
13-3/8
340
SL330
15-1/2
394
Roof Flashing
RF370
0
0
RF371
0
0
Chimney Sections*
SL306
4-3/4
121
SL312
10-3/4
273
SL318
16-3/4
425
SL324
22-3/4 578
SL336
34-3/4 883
SL348
46-3/4 1187
* Dimensions re
fl
ect effective height.
• Minimum overall straight height
16.5 ft
(5.03 m)
• Minimum height with offset/return
16.5 ft
(5.03 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)
• Double offset/return minimum height
20 ft
(6.1 m)
• Maximum unsupported chimney length
between the offset and return
6 ft
(1.83 m)
• Maximum unsupported chimney height above
the
fi
replace
35 ft
(10.67 m)
• Maximum unsupported chimney above roof
6 ft
(1.83 m)
Note:
A maximum of two pairs of offsets and returns may
be used.