19
Mark a 10” x 10” square around the center mark (inside dimensions). Cut and frame the exterior wall
to except the Wall Thimble (Duravent part #942 penetration heat shield). Install the Wall Thimble
shield using wood screws. If the wall being penetrated is constructed of non-combustible material a 7”
hole sufficient for the vent pipe is acceptable.
Caution: When installing the terminal on to
vinyl siding, a vinyl siding kit or furring strips
must be used to prevent the terminal from
being recessed into the siding.
When the
termination is to be attached to vinyl siding, apply
a bead of non-hardening mastic around the
outside edge to form a seal between the standoff
and the terminal. Attach the terminal to the
exterior wall by using four wood screws through
the holes in the corners of the vent terminal.
Complete the terminal installation; apply a bead
of mastic around the outer edge of the vinyl
standoff. With the termination installed you can
now connect completed vent assembly by sliding
the unit back towards the wall and carefully
inserting the pipe into the terminal. Before the
final connection is made slide on the decorative
wall thimble. Secure the terminal by securing the
termination straps to
the pipe as close to the
exterior wall as possible using sheet metal
screws. Ensure that the straps are hidden by the
wall thimble cover. Apply decorative trim if
required
.
Figure 12
Before sliding the pipe into the termination, ensure that you have slid the decorative wall thimble cover and
penetration heat shield over the pipe.
Slide the pipe into the vent, making sure that at least 11/4” overlap between the pipe and the terminal. Attach
the pipe by attaching two sheet metal screws through the terminal straps and into the pipe. Bend back the
straps towards the terminal making sure they are hidden by the decorative thimble. Finally attach the wall
penetration heat shield and secure with wood screws
Figure 13
Siding
Apply sealant
On four sides
Siding standoff
Wall Thimble
Duravent
Part #942
10”
Screws
HOT
