20
FIGURE 23.
This unit can vent through 2”, 3” or 4” nonmetallic pipe and fi ttings.
The vent pipe installation can be started from either the blower
discharge or the termination wall. Keep in mind the total vent system
(pipe and elbows) when installing the vent system, see VENTING AND
INSTALLATION AND MAXIMUM VENT LENGTHS, page 17.
FIGURE 24.
The vent terminal should be kept as close as possible to the outside wall,
but you need to allow at least 1.5” (3.8 cm) of pipe past the wall, for the
wall fl ange and vent terminal to mount on the pipe.
Before the vent terminal is installed, caulk (not supplied) around the
pipe on the exterior wall and install the optional wall fl ange. The fl ange
can be held to the outside wall by placing some of the caulking on the
back of the fl ange. The wall fl ange is supplied for decorative purposes
only and is not a requirement for the vent termination (if not needed by
the installer).
VERTICAL VENT THROUGH ROOF
This unit is approved for venting through the roof with the type vent
terminal that is included with the unit. A proper fl ashing or “BOOT” should
be used to seal the pipe where it exits the roof.
The total vent system should not exceed that which is specifi ed, see
VENTING AND INSTALLATION, page 17.
All of the pipe should be secured as per the instructions in the instructions
in the VENTING AND INSTALLATION, page 17.
VERTICAL VENT TERMINATION RESTRICTIONS
1. Minimum of twelve 12” (30.5 cm) above the roof or twelve 12”
(30.5 cm) above the anticipated snow level. Provide proper support
for all pipe protruding through the roof.
FIGURE 25.
2. 4’ (1.2 m) from or 1’ (0.3 m) above any gable, dormer, or other roof
structure with access to interior of building (i.e.-vent, window etc.).
3. 3’ (0.9 m) above any forced air inlet located within 10’ (3.0 m).
