CR Series Woodburning Fireplaces
Chimney Requirements - Offset Installations
Chimney Flue Exit
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| 30° |
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| Return |
A |
| B | G | Elbow |
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| 30° | G |
D |
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E | Rise | Elbow |
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C | 6 FT. |
| 30° | SKCS8 |
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| Support | ||
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| H |
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| Offset | Elbow |
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B |
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| Elbow |
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| Hearth Floor |
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Example 1 |
| Example 2 |
| Example 3 |
NOTE: G + H Cannot Exceed 20’ |
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| FP269CR | |
OFFSET
RISE
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| FP282 |
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| 30˚ Elbow Offsets |
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| 1’ | 1¹⁄₂' 3’ | 4’ | Chimney Support | Offset | Rise |
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| 0 | 0 | 0 | 0 | 0 | 3” | 11” |
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| 1 | 0 | 0 | 0 | 0 | 8¹⁄₄" | 20" |
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| 0 | 1 | 0 | 0 | 0 | 11¹⁄₄" 25¹⁄₄" |
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| 2 | 0 | 0 | 0 | 0 | 13¹⁄₂" 29¹⁄₄" |
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| 1 | 1 | 0 | 0 | 0 | 16¹⁄₂" 34¹⁄₄" |
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| 0 | 0 | 1 | 0 | 0 | 20¹⁄₄" 40³⁄₄" |
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| 2 | 1 | 0 | 0 | 0 | 21³⁄₄" 43¹⁄₂" |
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| 0 | 0 | 0 | 1 | 0 | 26¹⁄₄" 51¹⁄₄" |
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| 0 | 1 | 1 | 0 | 0 | 28¹⁄₂" 55¹⁄₄" |
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| 1 | 0 | 0 | 1 | 0 | 31¹⁄₂" 60¹⁄₄” |
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| 0 | 1 | 0 | 1 | 0 | 34¹⁄₂" 65¹⁄₂" |
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| 0 | 0 | 2 | 0 | 0 | 37¹⁄₂" 70³⁄₄" |
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| 1 | 1 | 0 | 1 | 1 | 41¹⁄₂" 77³⁄₄" |
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| 0 | 0 | 1 | 1 | 1 | 45" 83³⁄₄" |
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| 0 | 1 | 2 | 0 | 1 | 47¹⁄₄" 87¹⁄₂" |
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| 0 | 0 | 0 | 2 | 1 | 51" | 94" |
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Illustration Key
The following safety rules apply to offset installations. (The letters correspond with letters above):
A.Height of the chimney measured from the hearth to the chimney exit at top:
| CR36L/R Series |
Maximum: | 90’0” |
Minimum: |
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Without elbows | 14’ 0” |
With 2 elbows | 15’ 0” |
With 4 elbows | 21’ 0” |
B.Do not use more than four elbows per chimney.
Attach the straps of the top elbows to a structural framing member.
The first elbow of any pair does not have straps.
C.The chimney cannot be more than 30° from the vertical plane.
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 (Model SKCS8) is required every 6 feet of angled run of chimney. Chimney supports are required at 30 feet and 60 feet of chimney height above the hearth also.
Determine the offset distance of your chim- ney 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.
0 | 1 | 1 | 1 | 1 | 53¹⁄₄" | 98" |
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" | 124" |
0 | 1 | 2 | 1 | 1 | 70¹⁄₂" | 128" |
0 | 0 | 0 | 3 | 1 | 74¹⁄₄" 134¹⁄₂" | |
0 | 1 | 1 | 2 | 2 | 78" 140³⁄₄" | |
0 | 0 | 3 | 1 | 2 | 81" | 146" |
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" | 220" |
Fig. 3 Chimney system requirements.
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