Offsets/Returns - Quadra-Fire PIONEER-III-ABK Installation Manual

B. Offsets/Returns
A 30° Elbow (measured from the vertical) is the largest that can be used in an offset. A 30° Elbow may not be combined
with another Elbow to make a steeper offset (e.g. two 30° Elbows are not allowed to be put together to form a 60° elbow.).
Avoid Elbows if possible. A totally vertical chimney is more efficient. When Elbows are necessary to avoid obstructions
such as rafters, ridgepoles, or joists, you are only allowed to use 2 pair of Elbows in any one chimney system. Horizontal
runs of chimney violate building code and are not allowed.
• An offset and return can be used as a single entity or separated by chimney section(s).
WARNING! Risk of Fire! DO NOT use offset/returns greater than 30° from vertical. Chimney draft will be restricted and
could cause overheating and fire.
• Measure the shift needed to avoid the overhead obstruction. Refer to dimension A in Figure 5.2.
• Find the appropriate A dimension listed in Table 5.3. The B dimension coinciding with the A dimension measurement in
Table 5.3 represents the required vertical clearance needed to complete the offset/return.
• Read across the chart to find the number of chimney sections/model numbers needed between the offset and return.
Figure 5.2 Chimney Offset/Return
Table 5.3 Offset Dimensions
15-degree
A
in. mm
1 5/8 41
2 7/8 73
4 1/8 102
4 1/2 114
5 3/4 146
6 152
7 1/4 184
7 3/4 197
8 3/4 222
10 3/8 264
10 5/8 270
11 7/8 302
13 1/2 243
13 3/4 349
15 381
16 1/2 419
18 457
19 5/8 498
20 5/8 524
22 3/4 578
24 610
25 7/8 657
Proper assembly of air-cooled chimney parts result in an overlap at chimney joints of 1-1/4 in. (32 mm). Effective
length is built into this chart.
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Quadra-Fire • PIONEER - III • 4182-901 Installation Manual • Rev C • 07/19
A
B
1-1/4 in. (32 mm)
OVERLAP
30-degree
B A
in. mm in. mm
13 3/8 340 3 5/8 92
17 3/4 451 5 1/2 140
22 3/8 568 7 1/4 184
23 5/8 600 8 1/2 216
28 1/4 718 10 1/4 260
29 3/8 746 11 1/2 292
34 864 13 1/4 337
36 1/8 918 14 1/2 368
39 3/4 1010 16 1/4 413
45 5/8 1159 19 1/4 489
46 3/4 1187 20 1/2 521
51 3/8 1305 22 1/4 565
57 1/4 1454 25 1/4 641
58 3/8 1483 26 1/2 673
63 1600 28 1/4 718
68 3/4 1746 31 1/4 794
74 5/8 1895 34 1/4 870
80 3/8 2042 37 1/4 946
84 1/8 2137 39 1/8 994
91 7/8 2334 43 1/4 1099 84 1/8 2137
96 1/2 2451 45 1/8 1146 87 1/4 2216
103 1/2 2629 49 1/4 1251 94 1/2 2400
Example:
Your "A" dimension from Figure 5.2 is 14-1/2 in. (368
mm). Using Table 5.3 the dimension closest to, but not
less than 14-1/2 in. (368 mm) is 14-1/2 in. (368 mm) us-
ing a 30° offset/return.
You determine from the table that you need 34-1/8 in.
(867 mm) (Dimension "B") between the offset and return.
The chimney component that best fits your application is
one SL324.
B
in. mm SL306 SL312 SL318 SL324 SL336 SL348
15 1/2 394 - -
18 5/8 473 1 -
21 3/4 552 2 -
23 3/4 603 - 1
27 686 1 1
29 737 - -
32 1/8 816 - 2
34 1/8 867 - -
37 3/8 949 1 -
42 1/2 1080 - -
44 5/8 1133 - -
47 3/4 1213 1 -
52 7/8 1343 - -
55 1397 - -
58 1/8 1476 1 -
63 1/4 1607 - 1
68 1/2 1740 - -
73 3/4 1873 - -
76 7/8 1953 1 -
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1 -
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- - - -
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- - - -
1 - - -
- - - -
- 1 - -
- 1 - -
2 - - -
- - 1 -
- - 1 -
- 2 - -
- - - 1
- - - 1
- - - 1
1 - - 1
- 1 - 1
- 1 - 1
- - 1 1
- - 1 1
- - - 2