SUPPORT SECTIONS
10 FINISHING YOUR CHIMNEY SYSTEM
10 Foot Rule
Minimum Chimney Height
Maximum Chimney Height
VENTING INSTALLTION
Continued
Maximum length of pipe between supports is 6 feet of angled run. A maximum of two 6 foot angled run sections per chimney system (See Figure 22).
RETURN
RETURNELBOW ELBOW
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| 6’ MAX |
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| (15.2cm) |
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6’ MAX | CEILING |
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(15.2cm) |
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SUPPORT |
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| PIPE |
| OFFSET | |
OFFSET |
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6’ MAX | ELBOW | |||
ELBOW |
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RETURN |
| (15.2cm) | RETURN | |
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ELBOW |
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| ELBOW | ||
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6’ MAX |
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(15.2cm) |
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| 6’ MAX | 6’ MAX |
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| (15.2cm) | (15.2cm) |
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OFFSET
ELBOW
FINISHING YOUR CHIMNEY SYSTEM
10 Foot Rule
All chimney terminations must extend a minimum of 3 feet above the highest point where it passes through the roof, and must be at least 2 feet above the roof within a 10 foot horizontal span (see Figure 23).
IMPORTANT: If an exposed portion of chimney is greater than 4 feet above the roof line, use support wires to keep chimney secure. The support wires may be attached to the outer pipe of the chimney with screws, provided the screws do not penetrate the inner flue pipe.
Figure 23 - 10 Foot Rule
| Minimum Chimney Height | |
Figure 22 - Typical Offset Installations | The minimum chimney height (measured from bottom of fireplace to | |
flue gas | ||
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| for a run with 1 elbow set, and 25 feet minimum for a run with 2 elbow | |
| sets. (A set consists of one starter elbow and one return elbow.) | |
| Uncommon circumstances such as neighboring hills, tall trees, or | |
| strong wind areas can cause down drafts in the chimney system. In | |
| such cases going beyond the minimum recommended height would | |
| be preferable to provide a better draw. | |
| Maximum Chimney Height | |
| The fireplace height approved for any chimney run with this | |
| fireplace system is 40 feet measured from bottom of fireplace to flue | |
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