Desa O-T L (V)DVC36(B)(H) - Manual (Page 14)

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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 13. 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 6. 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 down-drafting
in high winds. Increasing the vent height may
solve this problem.
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.
VENTINg INSTALLATION
INSTRUCTIONS
Continued
Vertical Termination Configurations
Figures 21 through 24 show four different con-
figurations for vertical termination.
Venting with Two 90° Elbows
Vertical (V)
horizontal (h
1
) +
horizontal (h
2
)
' min. ' max.
6' min. 4' max.
7' min. 6' max.
8' min. 8' max.
0' max. 8' max.
Figure 21 - Vertical Venting
Configuration Using Two 90° Elbows
with Two Horizontal Runs (Vertical
Round High Wind Termination Shown)
Note: Install restrictor
into inner collar of
fireplace as shown.
4° Elbow
Venting with One 90° Elbow
Vertical (V)
horizontal (h)
' min. ' max.
6' min. 4' max.
7' min. 6' max.
8' min. 8' max.
0' max. 8' max.
Figure 22 - Vertical Venting
Configuration Using One 90° Elbow
(Vertical Round High Wind Termination
Shown)
4° Elbow
Note: Install restrictor into
inner collar of fireplace as
shown.