VENTING INSTALLATION
Continued
Continue to assemble chimney sections as outlined, making sure that both the inner and outer pipe sec- tions are locked together. When installing double wall
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 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 & b on page 8).
3.Maximum length of pipe between supports (return elbow or
4.All pipe connections between the offset and return must be secured with two screws on the outer pipe only (see Figure 9, page 8). Do not penetrate the inner stainless.
OFFSET | RISE |
| CHIMNEY LENGTH |
| ||||
A | B | 48" | 36" | 24" | 18" | 12" | ||
4 3/8" | 16 3/8" |
| ELBOW SET ONLY |
| ||||
9 3/4" | 25 1/2" |
|
|
|
|
|
| 1 |
12 3/4" | 30 3/4" |
|
|
|
| 1 |
|
|
15" | 34 3/4" |
|
|
| 1 |
|
|
|
18" | 40" |
|
|
|
| 1 |
| 1 |
21 1/4" | 46 1/4" |
|
| 1 |
|
|
|
|
23 3/4" | 49 1/4" |
|
|
| 1 | 1 |
|
|
27 3/4" | 56 3/4" | 1 |
|
|
|
|
|
|
30" | 60 3/4" |
|
| 1 |
| 1 |
|
|
33" | 66" | 1 |
|
|
|
|
| 1 |
36" | 71" | 1 |
|
|
| 1 |
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38 1/4" | 75" |
|
| 2 |
|
|
|
|
41 1/4" | 80 1/4" |
|
| 1 |
| 1 |
| 1 |
45" | 86 3/4" |
|
| 2 |
|
|
|
|
46 3/4" | 89 1/2" | 1 |
|
|
| 1 |
| 1 |
51" | 97" | 1 |
| 1 |
|
|
|
|
53 1/4" | 101" |
|
| 2 |
| 1 |
|
|
56 1/4" | 106 1/4" | 2 |
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|
|
|
|
|
59 1/4" | 111 1/2" | 1 |
| 1 |
| 1 |
|
|
61 3/4" | 115 1/2" | 2 |
|
|
|
|
| 1 |
64 3/4" | 120 3/4" | 2 |
|
|
| 1 |
|
|
68 1/4" | 127" | 1 |
| 2 |
|
|
|
|
70" | 130" | 2 |
|
|
| 1 |
| 1 |
74 1/4" | 137 1/2" | 1 |
| 2 |
|
|
| 1 |
76 3/4" | 141 1/2" | 1 |
| 2 |
| 1 |
|
|
79 3/4" | 146 3/4" |
|
| 4 |
|
|
|
|
OFFSET CHART (22-50 FT. SYSTEM HEIGHT)
Return
Elbow
Offset
Elbow
6' Max.
Return
Elbow
Offset
Elbow
Return Elbow 
| Return |
|
|
| Elbow |
|
|
| Return |
|
|
| Elbow |
|
|
6' Max. | Ceiling |
|
|
|
|
| |
| Support Pipe |
|
|
| 6' | Max. | |
|
|
6' Max.
Offset
Elbow
A
Offset Elbow
| Offset |
6' Max. | Elbow |
|
B
6' Max.
C
Figure 7 - Typical Offset Terminations
www.desatech.com | 7 |
