14
5/8"
Inlet
Exhaust
Combustion
Offset with
Exhaust Pipe
for Adequate
Dimensional
Clearance
PVC or
ABS Pipe
See Vent Table 6
Straps or Other Suitable
Supports at Minimum of 5 ft. Intervals
Upward Pitch - 1/4" per Foot
Outlet Exhaust Vent
First Support Placed
as Close to Furnace
Connection as Possible
Exhaust Vent
Wall
Seal/Caulk
around Pipe
at Building
90° Elbow
12" Min.
Normal Snow Level
7"
Straight Neoprene Coupling
with 2 Hose Clamps*
(Optional - Not Shown)
Figure 10. Horizontal Venting
* These neoprene couplings are fi eld-supplied and can be used if the installation requires breakable connec-
tions in the piping. Note that a maximum of two couplings per pipe are allowed.
Upfl ow Furnaces
Combustion
Air Pipe
Exhaust
Vent
Cabinet
5'
Support System on
Vertical Rise Below Joints
Support System with
first support as close
to furnace as Possible
Upward Pitch
1/4" per Foot
Furnace Front
Straight Neoprene
Couplings with
2 Hose Clamps*
(Optional - Not
Shown)
Upfl ow Furnaces
Figure 11. Vertical Venting
* These couplings are fi eld-supplied and can be used if the installation requires breakable connections in the
piping. Note that a maximum of two couplings per pipe are allowed.
Combustion Air Inlet Pipe Collar
Diameter 3" for coupling
Furnace Top
2" PVC
Exhaust Vent
Use 2" to 3" reducer
Upfl ow Furnaces
Figure 12. Furnace Pipe Adaptions