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Venting
Vent Material
This unit is approved for installation using
5 x 8 inches co-axial direct vent pipe and accessories
as listed in the Approved Venting Components section
on pages 68–69 of this manual. Follow the installation
instructions supplied with the individual venting
accessories.
This unit may also be converted to 4 x 6-5/8 inches co-
axial direct vent pipe and accessories using the adapter
supplied with the appliance—see list in the Approved
Venting Components section on pages 68–69 of this
manual.
Vent Sealing
Seal all outer coaxial pipe and elbow joints, including
sectioned elbow joints, using high quality, high tem-
perature 2 inch wide self-adhesive aluminum foil tape
(Nashua-322-2 brand or similar). Wrap the tape com-
pletely around all joints and press fi rmly to seal.
A high temperature black silicone sealant may be used
in the outer joints as a substitute to foil tape.
Ensure all the pipe joints have a minimum of 1 ¼ inch
overlap.
Wall Thickness
The appliance vent is suitable for penetrating a
combustible wall assembly up to 8 inches in thickness.
A non-combustible wall can be of any thickness up to
the maximum horizontal run of vent pipe allowed for
the particular installation.
Tape all joints
(including all
elbow joints)
Framing Vent in Combustible Walls & Ceilings
(6-5/8" and 8" pipes)
When penetrating through combustible walls and
ceilings, frame a minimum of 10 in x 10 in opening and
ensure that the insulation is kept clear of the vent pipe
using either a wall thimble or an attic insulation shield.
Note that some vent manufacturers' wall thimble
dimensions may require larger framed openings—
follow the installation instructions supplied with the
individual venting components.
Align the vent
center to the
center of the
frame
10" (254 mm)
Important Installer Notice – Weather
Sealing & Vapor Barriers
It is the installer's responsibility to ensure that
vent installations through exterior walls are
caulked and weatherproofed in such a manner
as to:
• Prevent rain water from entering the wall from
the weather side by adequately caulking the
outer vent plate to the exterior wall surface.
• Prevent moisture inside the home from pen-
etrating into the wall structure by ensuring the
inside wall plate is adequately sealed to the
inside vapor barrier.
• Prevent rain water and moisture from enter-
ing the walls by sealing the joints between the
outer vent tube and the inner and outer wall
plates.
We recommend the use of a high quality polyure-
thane sealant.
All horizontal pipe runs must be graded 1/4 inch per
foot upwards in the direction of the exhaust fl ow. The
fi nal pipe length, when terminating through the wall
may be graded downwards slightly to prevent water
migration.
Overview
10" (254 mm)
19
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