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Using Offsets
•
30° Elbows may be used to offset the chimney (to
align the chimney or gain clearance to combustibles
•
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 18" 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. 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
I
NSTALLATION
X
R
Superior TF8
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
(C
Chimney must be totally
enclosed when passing
through living space with a
minimum 2" clearance to
combustibles.
Cooling Vents
4' Max.
FMI 8DM
Marco 8D
OFFSET
RISE
OFFSET
"X"
"R"
"X"
4 3/8
16 3/8
5 1/4
5 3/8
9 1/8
5 1/4
8 3/8
14 3/8
8 1/4
---
---
---
17 3/8
29 7/8
17 1/4
23 3/8
40 1/4
23 1/4
6 3/4
11 3/4
5 1/4
)
ONTINUED
Firestop
Firestop
2"
Min.
Max. of 30
degrees
RISE
"R"
19 1/4
9
14 1/2
---
30 1/4
40 1/2
9 1/4
P
15
AGE
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