FINISHING YOUR CHIMNEY SYSTEM | 11 |
Maximum Chimney Height (Cont.) |
Chimney Maintenance
VENTING INSTALLTION
Continued
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| Chimney Maintenance |
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WARNING: Do not operate an unvented gas log | Have your chimney system cleaned and inspected regularly to | ||||||
set in this fireplace with the chimney removed. | ensure safe and efficient operation. |
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Using Figure 24 and the roof opening chart below, determine the | |||||||
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| opening that will be required for the pitch of your particular roof. | ||||
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Collar |
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| Roof Opening Chart |
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Flashing |
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| PITCH | Opening “A” | Use Flashing | |||
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| (degrees) | Max. (inches) | Model Number | ||
| MINIMUM |
| FLAT | 19 |
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Firestop | HEIGHT |
| 23 | 1 | /4 | ||
15 FT. |
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Spacer | (4.5m) |
| (26.6 deg. Slope) |
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| 30 3/4 | ||||
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| (56.3 deg. Slope) |
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| MAXIMUM |
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| HEIGHT |
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| CHASE |
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| TERMINATION |
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| 40 FT. |
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| (12m) | 19" Min. |
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| (48.26cm) |
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| 2" Min. |
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| (5.08cm) |
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| 30" Min. |
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| (76.2cm) |
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| Firestop |
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| 2" Min. |
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| (5.08cm) | |
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| Spacer |
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| 2" Min. |
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| (5.08cm) |
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| 30° |
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| Firestop |
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| Opening |
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| A |
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| Figure 25 - Roof Opening |
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| 30° Offset/ |
| Before cutting hole, temporarily remove shingles around area to be | ||||
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| opened. After preparing the opening on the roof, continue to add | ||||
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| sections of pipe until it extends a minimum of 30 inches above | ||||
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| highest point of roof cutout (see Figure 25). |
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| With the termination, the minimum height should add up to 3 feet | ||||
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| (see |
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Figure 24 - Maximum Chimney Height
For more information, visit www.desatech.com
