Quadra-Fire QV36DC-A Owner's Manual page 26

For Vertical Terminations - To locate the vent and install
the vent sections:
• Locate and mark the vent centerpoint on the underside
of the roof, and drive a nail through the centerpoint.
• Make the outline of the roof hole around the centerpoint
nail.
• The size of the roof hole framing dimensions depend on
the pitch of the roof. There MUST BE a 1-inch (25.4mm)
clearance from the vertical vent pipe to combustible
materials.
• Mark the roof hole accordingly.
• Cover the opening of the installed vent pipes.
• Cut and frame the roof hole.
• Use framing lumber the same size as the roof rafters
and install the frame securely. Flashing anchored to the
frame must withstand heavy winds.
• Continue to install concentric vent sections up through
the roof hole (for inside vent installations) or up past the
roof line until you reach the appropriate distance above
the roof (for outside terminations).
WARNING: MAJOR U.S. BUILDING CODES
!
SPECIFY MINIMUM CHIMNEY AND/OR
VENT HEIGHT ABOVE THE ROOF TOP.
THESE MINIMUM HEIGHTS ARE NECESSARY IN
THE INTEREST OF SAFETY. SEE FIGURE 30 FOR
MINIMUM HEIGHTS, PROVIDED THE TERMINA-
TION CAP IS AT LEAST TWENTY INCHES FROM
A VERTICAL WALL AND 2-FEET BELOW A HORI-
ZONTAL OVERHANG.
NOTE: This also pertains to vertical vent systems
installed on the outside of the building.
26 Quadra-Fire • QV36DC-A • 2161-900 Rev. B • 10/08
To seal the roof hole, and to divert rain and snow from the
vent system:
• Attach a fl ashing to the roof using nails, and use a non-
hardening mastic around the edges of the fl ashing base
where it meets the roof.
• Attach a storm collar over the fl ashing joint to form a
water-tight seal. Place non-hardening mastic around the
joint, between the storm collar and the vertical pipe.
• Slide the termination cap over the end of the vent pipe
and snap into place.
2 FT.
20 INCH MIN.
MIN.
LOWEST
DISCHARGE
OPENING
TERMINATION
CAP
H (MIN.) - MINIMUM HEIGHT FROM ROOF
TO LOWEST DISCHARGE OPENING
Roof Pitch
fl at to 6/12
6/12 to 7/12
over 7/12 to 8/12
over 8/12 to 9/12
over 9/12 to 10/12
over 10/12 to 11/12
over 11/12 to 12/12
over 12/12 to 14/12
over 14/12 to 16/12
over 16/12 to 18/12
over 18/12 to 20/12
over 20/12 to 21/12
Figure 30. Minimum Height from Roof to
Lowest Discharge Opening
HORIZONTAL
OVERHANG
VERTICAL
WALL
X
12
ROOF PITCH
IS X/ 12
H (min.) ft.
1.0
1.25
1.5
2.0
2.5
3.25
4.0
5.0
6.0
7.0
7.5
8.0