Offset Requirements (30° Elbows) - FireplaceXtrordinair Xtrordinair 44 Elite Installation Manual

18
Offset Requirements (30° Elbows)
•
Offsets (using a pair of 30° elbows) may be used to
redirect the chimney. Typically this is done to avoid
structures, align the pipe with framing, or to gain
clearance to combustibles (see Figure 22).
•
A maximum four 30° elbows may be used.
•
Each elbow must be used in conjunction with a
return elbow (so the chimney returns to a vertical
direction)
•
If using a single offset (two 30° elbows) a maximum
of 8' of inclined chimney may be used between
elbows.
•
If using two offsets (four 30° elbows) a maximum of 4'
of inclined chimney may be used between each set
of elbows.
•
For every 6' of inclined chimney a flue support is
required
•
Elbows may be used directly off the top of the
fireplace (maintain a 5" clearance to combustibles
on the back wall, 4 1/2" minimum on the front wall
and header, and 2" minimum to the side walls)
•
The table below details the amount of offset ("X")
and rise ("R") gained from various chimney lengths
when used with 30° elbows (see Figure 21). Make
sure to add the amounts for both elbows. Two
sections may be added together to form a combined
length. For example, 12" and 18" Temco chimney
sections give an offset of 17-5/8" (3-7/8" + 5-3/8" + 8-
3/8" = 17-5/8"). The rise ("R") equals 38-1/8" (14-
3/8" + 9-1/4" + 14-1/2" = 38-1/8").
Temco 82 Series
MEASURED OFFSET
IN INCHES "X"
2 Elbows 3 7/8
12" Section 5 3/8
18" Section 8 3/8
24" Section 11 3/8
36" Section 17 3/8
48" Section 23 3/8
Flue Support 1 1/2
© Travis Industries
Installation
(for qualified installers only)
X
R
Firecraft FTF8
RISE OFFSET RISE
"R" "X" "R"
14 3/8 4 15
9 1/4 5 1/4 9
14 1/2 8 1/4 14 1/4
19 5/8 --- ---
30 17 1/4 30
40 3/8 23 1/4 40 1/4
2 3/8 1 1/2 2 1/2
Chimney must be totally
enclosed when passing
through living space with a
minimum 2" clearance to
combustibles.
Cooling Vents
Figure 21
FMI 8DM
OFFSET RISE
"X" "R"
4 3/8 16 3/8
5 3/8 9 1/8
8 3/8 14 3/8
--- ---
17 3/8 29 7/8
23 3/8 40 1/4
6 3/4 11 3/4
4050714
Firestop
Firestop
2"
4' Max.
Min.
Max. of 30
degrees
Marco 8D
OFFSET RISE
"X" "R"
5 1/4 19 1/4
5 1/4 9
8 1/4 14 1/2
--- ---
17 1/4 30 1/4
23 1/4 40 1/2
5 1/4 9 1/4
Figure 22
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