8Chimney Assembly
Notice: Chimney performance may vary.
•Trees, buildings, roof lines and wind conditions affect performance.
•Chimney height may need adjustment if smoking or overdraft occurs.
A. Chimney Requirements
Measure vertical distances from the base of the fireplace.
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| Feet | Meters |
• Minimum overall straight height | 18 | 5.49 | |
• Minimum height with offset/return | 18.5 | 5.64 | |
• | Maximum height | 50 | 15.24 |
• Maximum chimney length between an offset | 20 | 6.10 | |
| and return |
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• Maximum distance between chimney stabiliz- | 25 | 7.62 | |
| ers |
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• Maximum unsupported chimney length be- | 6 | 1.83 | |
| tween the offset and return |
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• Maximum unsupported chimney height above | 25 | 7.62 | |
| the fireplace |
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• | Maximum unsupported chimney above roof | 6 | 1.83 |
Warning! Risk of Fire! You must maintain 2 in. (51 mm) air space clearance to insulation and other combustible materials around the chimney system. Failure to do so may cause overheating and fire.
Table 8.1
Height of Chimney Components | in. | mm | |
Stabilizer |
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Firestop |
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Elbows |
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Miscellaneous |
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Chimney Sections* |
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| 10 1/2 | 267 | |
| 16 1/2 | 419 | |
| 34 1/2 | 876 | |
| 46 1/2 | 1181 | |
* Dimensions reflect effective height. |
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Heatilator • Birmingham | 23 |