| INSTALLATION |
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| Continued | CD32M and |
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6. | For vertical installation, a vertical termination is |
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4 1/4" Inner and | ||||||||||||
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| available. Also for vertical venting application, | 7 1/4" Outer |
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| Minimum Pipe | |||||||
| install vertical flue restrictor into inner collar of |
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| fireplace as shown in Figure 6, page 7. | 5" Inner and 8" | Overlap 1 1/4" | |||||||||
| When installing a length of pipe for vertical | Outer |
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| termination that is over 3 ft., support the pipe |
| Wall Firestop |
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| every 3 ft. using metal wall straps. Vertical to |
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| horizontal pipe must be kept at a 1 ft. to 4 ft. ratio |
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| with a maximum run of no more than 20 ft. |
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| If an offset is necessary in the attic to avoid |
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| obstruction, it is important to support the | Maintain 1" |
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| vent pipe every 3 | ft. to avoid excessive |
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| Minimum |
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| stress on the elbows and possible separation |
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| Air Space |
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| (see Figure 8). |
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| Screws | ||||
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| Around Outer |
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| Clearances must be maintained between the roof |
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| Pipe when |
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| and the termination. | Refer to chart below. |
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| Penetrating a |
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| Wall |
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| (Vent Cap) | ||
| Roof Pitch | Minimum Height |
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| Exterior Wall | ||||||
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| Above Roof | Framed Openings | ||||||
| Flat - 7/12 |
| 1 ft. (30.48 cm) | CD32M and |
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| 7/12 - 8/12 |
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| 10" x 10" |
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| 1 | /2 ft. (45.72 cm) |
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| 8/12 - 9/12 |
| 2 ft (60.96 cm) |
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| 10 | 3 | /4" x 10 | 3 | /4" |
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| 9/12 - 10/12 | 2 | 1 | /2 ft (76.20 cm) | Figure 7 - Vent Termination (Horizontal) | |||||||
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| 10/12 - 11/12 | 4 ft (121.92 cm) |
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| 11/12 - 14/12 | 5 ft (152.40 cm) |
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| 14/12 - 16/12 | 6 ft (182.88 cm) |
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| Flashing | ||||||
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| 16/12 - 18/12 | 7 ft (213.36 cm) |
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| 18/12 - 20/12 | 7 | 1 | /2 ft (228.60 cm) |
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| 20/12 - 21/12 | 8 ft (243.84 cm) |
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| Wall Strap |
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45° Elbows
Ceiling Firestop
Figure 8 - Vertical Termination with
Offset and Wall Strap
8 | www.desatech.com |
