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OFFSET
RISE
A
B
4
/
"
16
3
3
8
9
/
"
25
3
1
4
12
/
"
30
3
3
4
15"
34
3
18"
40"
21
/
"
46
1
1
4
23
/
"
49
3
1
4
27
/
"
56
3
3
4
30"
60
3
33"
66"
36"
71"
38
/
"
75"
1
4
41
/
"
80
1
1
4
45"
86
3
46
/
"
89
3
1
4
51"
97"
53
/
"
101"
1
4
56
/
"
106
1
4
59
/
"
111
1
4
61
/
"
115
3
4
64
/
"
120
3
4
68
/
"
127"
1
4
70"
130"
74
/
"
137
1
4
OFFSET CHART (22-50 FT. SYSTEM HEIGHT)
Screws
A
Figure 12 - Elbow Offset
900855-00_B
VENTING INSTALLATION Continued
CHIMNEY LENGTH
12" 18" 24" 36" 48"
/
"
ELBOW SET ONLY
8
/
"
1
2
/
"
1
4
/
"
1
4
1
1
/
"
1
4
/
"
1
1
4
/
"
1
4
/
"
1
1
4
1
1
1
1
2
/
"
1
1
1
4
/
"
1
1
4
/
"
1
2
2
2
1
1
1
/
"
1
2
1
4
/
"
1
2
1
2
/
"
2
1
1
2
/
"
1
1
2
3
4
1
2
1
1
2
1
/
"
4
1
2
B
SuperiorFireplaces.us.com
USING ELBOW OFFSETS (30E-12DM)
1. To achieve desired offset, you may install combinations of 12",
18", 24", 36" and 48" length of double wall pipe (see offset chart
and Figure 12).
2. Chimney weight above offset rests on return elbow. Straps must
be securely nailed to rafters or joists (see Figure 13, details A and
B).
3. Maximum length of pipe between supports (return elbow or
12S-12DM) is 6' of angle run. Maximum of two 6' angle run
sections per chimney system (see Figure 14, page 12).
4. All pipe connections between the offset and return must be
secured with two screws on the outer pipe only (see Figure
12). Do not penetrate the inner stainless.
Straps
Straps
Detail B
Angle Firestop
Straps
Straps
Detail A
Return Elbow
Figure 13 - Ceiling Support Pipe 12S-12DM
CAUTION: THE STRUCTURAL INTEGRITY OF THE
MANUFACTURED HOME FLOOR, WALL, AND CEILING/
ROOF MUST BE MAINTAINED.
WARNING: DO NOT INSTALL IN SLEEPING ROOM
OF MOBILE HOMES.
See Detail A
2" (51 mm)
Min.
See Detail B
11
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