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STR/CVR Series Woodburning Fireplaces
Chimney Requirements - Offset Installations
CHIMNEY FLUE EXIT
A
D
6 FT.
C
OFFSET
B
HEARTH
FLOOR
Example 1
Notes: G + H cannot exceed 20 feet.
Air Space Clearances:
SK8 (2-wall) = 1¹⁄₂" , and 11CF (2-wall) = 2"
Illustration Key
The following safety rules apply to
offset installations (letters correspond
with illustration above):
A. Height of the chimney is measured
from the hearth to the chimney exit.
CVR / STR Series
Maximum:
Minimum:
Without Elbows
With 2 Elbows*
With 4 Elbows*
B. Do not use more than 4 elbows per
chimney.
Attach the straps of the return (top)
elbow to a structural framing member.
The offset (first) elbow of any pair does
not have straps.
* In Canada, two (2) SK845 are allowed.
Fig. 5 Chimney system requirements.
6
CHIMNEY
SECTION
ELBOW
B
G
E
RISE
H
Example 2
C. The chimney cannot be more than 30˚
(45˚ in Canada) from the vertical plane in
any installation*.
D. The maximum length of the angled run
of the total chimney system is 20 feet. (G
plus H cannot exceed 20 feet.)
E. A chimney support (Models TCS8A or
11CS) is required every 6 feet of angled
90'0"
run of chimney. Chimney supports are re-
quired for every 30 feet and 60 feet (SK8
15'6"
& CF11 pipe) of vertical chimney height
17'6"
above the hearth.
21' 0"
Determine the offset distance of your
chimney arrangement from the centerline
of the fireplace to the centerline of the
chimney where it is to pass through the
first ceiling.
NOTE: This offset distance may not be
your full offset distance. See Examples 2
and 3.
30˚
RETURN
ELBOW
G
30˚
OFFSET
ELBOW
SKCS8
30˚
SUPPORT
RETURN
ELBOW
H
30˚
OFFSET
ELBOW
Example 3
FP720
FP720
STR/CVR
6/4/98
OFFSET
RISE
FP282
30˚ Elbow Offsets
IWF282
MBUF
5/26/96
1' 1¹⁄₂' 3' 4'
Offset
Rise
0 0 0 0
0
3"
1 0 0 0
0
8¹⁄₄"
0 1 0 0
0
11¹⁄₄"
25¹⁄₄"
2 0 0 0
0
13¹⁄₂"
29¹⁄₄"
1 1 0 0
0
16¹⁄₂"
34¹⁄₄"
0 0 1 0
0
20¹⁄₄"
40³⁄₄"
2 1 0 0
0
21³⁄₄"
43¹⁄₂"
0 0 0 1
0
26¹⁄₄"
51¹⁄₄"
0 1 1 0
0
28¹⁄₂"
55¹⁄₄"
1 0 0 1
0
31¹⁄₂"
60¹⁄₄"
0 1 0 1
0
34¹⁄₂"
65¹⁄₂"
0 0 2 0
0
37¹⁄₂"
70³⁄₄"
1 1 0 1
1
41¹⁄₂"
77³⁄₄"
0 0 1 1
1
45"
83³⁄₄"
0 1 2 0
1
47¹⁄₄"
87¹⁄₂"
0 0 0 2
1
51"
0 1 1 1
1
53¹⁄₄"
0 0 3 0
1
56¹⁄₄" 103¹⁄₄"
0 1 0 2
1
59¹⁄₄" 108¹⁄₂"
0 0 2 1
1
62¹⁄₄" 113¹⁄₂"
0 1 3 0
1
64¹⁄₂" 117¹⁄₂"
0 0 1 2
1
68¹⁄₄"
0 1 2 1
1
70¹⁄₂"
0 0 0 3
1
74¹⁄₄" 134¹⁄₂"
0 1 1 2 2
78" 140³⁄₄"
0 0 3 1 2
81"
0 1 0 3 2
84" 151¹⁄₄"
0 0 2 2 2
87" 156¹⁄₂"
0 1 3 1 2
89¹⁄₄" 160¹⁄₄"
0 0 1 3 2
93" 166³⁄₄"
0 1 2 2 2
95¹⁄₄" 170³⁄₄"
0 0 0 4 2
99¹⁄₄" 177³⁄₄"
0 1 1 3 2 101¹⁄₄" 181³⁄₄"
0 0 3 2 2 104¹⁄₄" 186¹⁄₄"
0 1 0 4 2 107¹⁄₄" 191¹⁄₂"
0 0 2 3 2 110¹⁄₄" 196³⁄₄"
0 1 3 2 3
114" 203¹⁄₄"
0 0 1 4 3 117³⁄₄" 209³⁄₄"
0 1 2 3 3
120" 213¹⁄₂"
0 0 0 5 3 123³⁄₄"
7412961
11"
20"
94"
98"
124"
128"
146"
220"
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