DuraVent Venting System For Direct Vent Pro - Manual (Page 13)

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ceilings, walls, roofs, enclosures, attic
rafters, or other nearby combustible
surfaces. Do not pack air spaces
with insulation. Check the appliance
manufacturer’s instructions for
maximum vertical rise of the venting
system and any maximum horizontal
offset limitations.
Step 2. Set the gas appliance in the
desired location. Drop a plumb bob
down from the ceiling to the position of
Figure 13
MARK
LOCATION
DRILL
PLUMB
MARK AND
BOB
the appliance flue exit, and mark the
location where the vent will penetrate
the ceiling. Drill a small hole at this
point. Next, drop a plumb bob from
the roof to the hole previously drilled
in the ceiling, and mark the spot
where the vent will penetrate the roof
(Fig. 13). Determine if ceiling joists,
roof rafters, framing or other materials
will obstruct the venting system. You
may wish to relocate the appliance, or
to offset, to avoid cutting load-bearing
members.
Step 3. To install the Round Ceiling
Support/Wall Thimble Cover in a flat
ceiling, refer to Table 1, page 8 and
cut a square hole in the ceiling (unless
otherwise specified by the appliance
manufacturer) centered on the hole
drilled in Step 2. Frame the hole as
shown (Fig. 14).
Step 4. If the twist-lock Appliance
Adaptor has not been installed on the
stove by the manufacturer, install it
now in accordance with the appliance
instruction manual.
Step 5. Assemble the desired Pipe
Sections and Elbows necessary to
reach from the Appliance Adaptor up
through the Round Ceiling Cover or
Support Box. Ensure that all Pipe and
Elbow connections are in their fully
twist-locked position.
Step 6. Cut a hole in the roof
centered on the small drill hole placed
in the roof in Step 2. The opening
should be of sufficient size to meet the
minimum requirements for clearance
to combustibles, as specified by the
appliance manufacturer. Continue to
assemble Pipe Sections and Elbows
as necessary to reach up through the