Venting Installation
instructions
Continued
5.Place the flashing over the pipe section(s) extending through the roof. Secure the base of the flashing to the roof and framing with roof- ing nails. Be sure roofing material overlaps the top edge of the flashing as shown in Figure 19, page 15. There must be a 1" clearance from the vent pipe to combustible materials.
6.Continue to add pipe sections until the height of the vent cap meets the minimum building code requirements described in Figure 7 on page 8. Note: You must increase vent height for steep roof pitches. Nearby trees, adjoining rooflines, steep pitched roofs and other similar factors may cause poor draft or
7.Twist-lock the vent cap onto the last section of vent pipe.
Note: If the vent pipe passes through any occupied areas above the first floor, including storage spaces and closets, you must enclose pipe. You may frame and sheetrock the enclosure with standard construction material. Make sure and meet the minimum allowable clearances to combustibles. Do not fill any of the required air spaces with insulation.
Vertical Termination Configurations Figures 21 through 24 show four different con- figurations for vertical termination.
Venting with Two 90° Elbows
Horizontal (H1) +
Vertical (V) Horizontal (H2)
5' min. | 2' max. |
6' min. | 4' max. |
7' min. | 6' max. |
8' min. | 8' max. |
20' max. | 8' max. |
45° Elbow |
|
Note: Install restrictor into inner collar of fireplace as shown.
Figure 21 - Vertical Venting
Configuration Using Two 90° Elbows
with Two Horizontal Runs (Vertical
Round High Wind Termination Shown)
Venting with One 90° Elbow
Vertical (V) | Horizontal (H) |
5' min. | 2' max. |
6' min. | 4' max. |
7' min. | 6' max. |
8' min. | 8' max. |
20' max. | 8' max. |
| 45° Elbow |
Note: Install restrictor into inner collar of fireplace as shown.
Figure 22 - Vertical Venting
Configuration Using One 90° Elbow
(Vertical Round High Wind Termination
Shown)
16 | www.desatech.com |
