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Appendix A
SIDE WALL VENTING INSTALLATION
SIDE WALL VENTING INSTALLATION
(see illustration #2)
1. Install wall thimble into wall, observing the aforementioned rules and/or local building codes. Select the
point of wall penetration where the minimum 114” per foot of slope (6.4 mm per 305 mm) can be
maintained. The pipe can be located between joists spaced 16” (400 mm) on centre. The pipe may be
mortared in directly without using a wall thimble, if the wall is non-combustible. Penetrating a combustible
wall requires the use of a wall thimble. A framed opening is required to insert the thimble halves. The
thimble is adjustable for different wall thicknesses. Caulk around outside edge of plates as necessary
and fasten to wall using suitable screws or nails. The vent pipe must be sealed at wall thimble as per
code regarding continuous vapor barrier.
2. The system can now be assembled through the thimble (attach the termination first - note “UP” arrow)
and then back to the appliance as per illustration using JOINT PROCEDURE as described on page #3. A
gear clamp (or locking band) must be installed around the pipe in position so that the system cannot be
removed in or out of wall. This applies to both combustible and non-combustible walls.