DuraVent DirectVent Pro Installation Instructions Manual page 16

HIGH WIND
VERTICAL
TERMINATION
STORM
COLLAR
ROOF
FLASHING
NAILS
ATTIC
INSULATION
SHIELD
REQUIRED
CLEARANCE
CLEARANCE AS
REQUIRED BY
APPLIANCE MFG
CLEARANCE AS
REQUIRED BY
APPLIANCE MFG
Figure 19
16
OPTIONAL
LOW PROFILE
TERMINATION CAP
Figure 18
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.
(3) If venting system passes through
an attic space the Attic Insulation
Shield or a chase enclosure must be
installed to prevent contact between
Pipe Sections and the insulation or
other debris. For the Attic Insulation
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adjust shield for appropriate insulation
level, then attach the collar at the top
of assembly (Fig. 19). For a chase
enclosure, it may be constructed out of
sheetrock or similar building materials
and framed around the support box
or the pipe, maintaining the clearance
to combustibles as required by the
appliance manufacturer. For vaulted
ceilings a chase enclosure must be
constructed as the Attic Insulation
Shield can not be installed.
SECURE FLASHING
WITH NON-HARDENING
SEALANT AND
ROOFING NAILS