Astria.us.com
126764-01_F
8
VENTING INSTALLATION
Continued
Figure 7 - Typical Offset Terminations
Figure 8 - Ceiling Support Pipe 12S-8DM
2" Min.
Straps
Straps
Straps
Straps
Detail A Return Elbow
Detail B Angle Firestop
See Detail A
See Detail B
Ceiling Support Pipe
12S-8DM
USING ELBOW OFFSETS (30E-8DM)
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).
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.
Return
Elbow
Return
Elbow
Return
Elbow
Offset
Elbow
Offset
Elbow
Return
Elbow
Return
Elbow
Offset
Elbow
Offset
Elbow
Offset
Elbow
6' (1.83 m) Max.
6' (1.83 m) Max.
6' (1.83 m) Max.
6' (1.83 m) Max.
6' (1.83 m) Max.
A
B
C
Ceiling Support
Pipe 12S-8DM
6' (1.83 m) Max.
