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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
Rubber Couplings
with 2 Hose Clamps
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)
Combustion Air Inlet
2" PVC on G6RL 040/060 models,
3" PVC on G6RL 080/100 models
2" PVC
Exhaust Vent
All Models
Furnace Top
Combustion Air Inlet Pipe Collar
Diameter 3" for coupling or reducer
Furnace Top
2" PVC
Exhaust Vent
All Models
G6RL Downflow Furnaces
G6RC & G6RD Upflow
Furnaces
G6RL Downflow Furnaces
G6RC & G6RD Upflow
Furnaces
Figure 16. Furnace Pipe Adaptions
Figure 15. Vertical Venting
* These couplings are field-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.