Rise and offsets, Finishing your chimney system 10 foot rule – Desa VPN36 3-SIDED User Manual
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RETURN
ELBOW
CEILING
SUPPORT
PIPE
V12S-10DM
RETURN
ELBOW
RETURN
ELBOW
RETURN
ELBOW
OFFSET
ELBOW
OFFSET
ELBOW
OFFSET
ELBOW
6' MAX
6' MAX
6' MAX
6' MAX
6' MAX
6' MAX
TYPICAL OFFSET INSTALLATIONS
RISE AND OFFSETS
A
B
48
36
18
12
4
3
/
8
16
3
/
8
9
1
/
2
25
1
/
4
1
12
1
/
2
30
3
/
8
1
14
3
/
8
34
2
17
5
/
8
39
1
/
4
1
1
21
1
/
2
46
1
22
3
/
4
48
1
/
8
1
2
26
3
/
8
54
7
/
8
1
26
3
/
8
60
1
1
31
3
/
4
63
3
/
4
1
1
34
3
/
4
69
1
1
38
5
/
8
75
5
/
8
2
39
7
/
8
77
7
/
8
1
1
1
43
3
/
4
84
1
/
2
1
1
46
3
/
4
87
3
/
4
2
1
48
7
/
8
93
3
/
8
2
To achieve desired offset, you may install combinations of 12, 18,
36, or 48 inch lengths of double wall pipe (see Figure 20 and Rise
and Offset Chart).
Figure 20
A
B
Maximum length of pipe between supports is 6 feet of angled run.
A maximum of two 6 foot angled run sections per chimney system
(see Figure 21).
Figure 21
FINISHING YOUR CHIMNEY SYSTEM
10 FOOT RULE
All chimney termination must extend a minimum of 3 feet
above the highest point where it passes through the roof and
must be at least 2 feet above the roof within a 10 foot horizontal
span (see Figure 22).
IMPORTANT: If an exposed portion of chimney is greater than 4
feet above the roof line, use support wires to keep chimney secure.
The support wires may be attached to the outer pipe of the chimney
with screws, provided the screws do not penetrate the inner flue pipe.
Figure 22
10 FOOT RULE
2' MIN.
2' MIN.
LEVEL OF FLUE
GAS OUTLET
10'
3' MIN.
3' MIN.
10'
OR LESS