DuraVent Venting System For Direct Vent Pro - Manual (Page 15)

15
Figure 16
WALL
PLUMBERS
STRAP/
TAPE
45°
ELBOW
45°
ELBOW
Figure 17
DIMENSION
FROM TABLE 2
"H" OBTAINED
adjoining rooflines, steep pitched
roofs, and other similar factors can
result in poor draft, or down drafting.
In these cases, increasing the vent
height or switching to the High Wind
Termination Cap may help to solve the
problem.
Step 9. Slip the Storm Collar over
the Pipe Section, and push it down to
the top of the Roof Flashing (Fig. 18).
Use non-hardening sealant between
the Storm Collar and the Pipe Section.
Step 10. Holding the bottom of the
Termination Cap only, twist lock
the cap onto the last Pipe Section
protruding above the roofline.
Notes:
(1) For multi-story vertical
installations, a Ceiling Firestop is
required at the second floor, and any
subsequent floors (Fig. 19). Refer
to Table 1, page 8. Cut and frame a
square opening for installation of the
Ceiling Firestop.
(2) If Vent passes through any
occupied areas above the first floor,
including closets and storage spaces,
it must be enclosed. The enclosure
may be framed and sheetrocked with
standard construction materials, but
required clearances to combustibles
must be maintained. Consult the
appliance manufacturer’s installation
instructions for the minimum allowable
clearance between the outside of
the vent pipe, and the combustible
surfaces of the enclosure. Do not fill
required air spaces with insulation.
(3) If venting system passes through
an attic space the Attic Insulation
Shield or a chase enclosure must be
installed to prevent contact between
TABLE 3
ROOF PITCH MINIMUM HEIGHT
Minim
Feet Meters
Flat to 7/12 1 0.3
Over 7/12 to 8/12 1.5 0.46
Over 8/12 to 9/12 2 0.61
Over 9/12 to 10/12 2.5 0.76
Over 10/12 to 11/12 3.25 0.99
Over 11/12 to 12/12 4 1.22
Over 12/12 to 14/12 5 1.52
Over 14/12 to 16/12 6 1.83
Over 16/12 to 18/12 7 2.13
Over 18/12 to 20/12 7.5 2.29
Over 10/12 to 21/12 8 2.44