37
Wall Framing
Horizontal wall
Termination
Wall thimble
fire stop
Exhaust Pipe
Combustion air
outer pipe
Elbow
Initial Installation
QUALIFIED INSTALLERS ONLY
Figure 59:
Horizontal Vent Termination
NOTES:
1. Horizontal pipes must not be level. For every 12 inches (305 mm) of horizontal travel (away
from the stove), there should be at least ¼ inch (6.4 mm) of vertical travel. Never allow the
vent to run downward, as this could cause high temperatures or even present the possibility
of a fire.
h
oRizontaL
t
eRmination
2. The exterior of the horizontal vent
termination must not be blocked or
obstructed.
3. If the vent termination is not
being attached to wood, the four
wood screws provided should be
replaced with material appropriate
fasteners.
4. For buildings with vinyl siding, a
vinyl standoff should be installed
between the vent cap and the
exterior wall. Attach the vinyl
siding standoff to the horizontal
termination. Note that the
termination bolts onto the flat
portion of the standoff, providing
an air space between the wall
and the vent termination. The air
gap prevents excessive heat from
possibly melting the vinyl siding.
5. Horizontal pipes must be supported
every 3 feet (914 mm). Plumber’s
all round strap will suffice.
6. When running horizontal pipe, clearances to combustibles must be maintained
1½ inches
(38 mm) sides,
1½ inches
(38 mm) bottom, and 2 inches (51 mm) top.
Step 1.
Set the fireplace in the desired location. Check to determine if wall studs will be in the way when the
venting system is attached. If this is the case, the location of the fireplace may have to be adjusted
or the venting may have to be offset.
Step 2.
Direct vent pipe sections are designed with special twist-lock connections. Dry fit the desired
combination of pipe and elbows to the appliance adaptor.
Step 3.
With the pipe in the correct position and attached to the fireplace, mark the wall for a 10 inches
(25.4 cm) x 10 inches (25.4 cm) square hole (see Figure 51). The center of the hole should match
the center line of the horizontal pipe. Cut and frame the hole in the exterior wall where the vent will
be terminated. If the wall being penetrated is made of a non-combustible material (i.e. masonry or
concrete) a 7 inches (17.8 cm) hole is acceptable.
