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127055-01_H
8
VENTING INSTALLATION
Continued
Figure 7 - Typical Offset Terminations
Figure 8 - Ceiling Support Pipe 12S-8DM
USING ELBOW OFFSETS 30E-12DMO-8DMR
To clear overhead obstructions, you may offset your chimney system
using 30E-12DMO-8DMR 30° Offset/return elbow.
A section or sections of chimney may be used between offsets and
return elbow. Transition pipe must be used after elbow offset is at-
tached.
1. To achieve desired offset, you may install combinations of 12",
18", 24", 36" and 48" length of double wall pipe (see offset chart,
page 9 and Figure 7).
Note:
For systems with 2 elbow sets, minimum height is 22 feet.
Maximum height for any system is 50 feet.
2. Chimney weight above offset rests on return elbow. Straps must
be securely nailed to rafters or joists (see Figure 8, details A and
B).
3. Maximum length of pipe between supports (return elbow or 12S-
8DM) is 6' of angle run. Maximum of two 6' angle run sections
per chimney system (see Figure 7).
4. All pipe connections between offset and return must be secured
with two screws on outer pipe only (see Figure 9, page 9). Do not
penetrate inner stainless.
2" (51 mm)
Min.
Straps
Straps
Straps
Straps
Detail A Return Elbow
Detail B Angle Firestop
See Detail A
See Detail B
Ceiling Support
Pipe 12S-8DM
30E-8DM
Return Elbow
30E-8DM
Return Elbow
30E-8DM
Offset Elbow
30E-8DM
Offset Elbow
30E-12DMO-8DMR
Offset Elbow
30E-12DMO-8DMR
Offset Elbow
30E-12DMO-
8DMR Offset
Elbow
30E-12DMO-8DMR
Return Elbow
30E-12DMO-8DMR
Return Elbow
30E-12DMO-
8DMR Return
Elbow
Starter Section
Starter Section
Starter Section
8 DM Pipe
8 DM Pipe
Ceiling
Support Pipe
12S-8DM
A
B
C
6' Max. (1.83 m)
6' Max. (1.83 m)
6' Max. (1.83 m)
6' Max. (1.83 m)
6' Max. (1.83 m)
6' Max. (1.83 m)
