Greenheck IGX Installation, Operation And Maintenance Manual page 17

Venting Instructions:
2-Pipe Vertical
1. Construct the vent system as shown below.
Looking in the direction of airflow, the venting is on
the right side of unit.
2. The bottom of the combustion air cap must be
located above the snow line or 12 inches above the
roof, which ever is greater.
Vertical Venting
A = 12 inch minimum
A1 = 12 inch minimum, but should size
according to expected snow depth.
B = 24 inch minimum
C = 12 inch minimum
Exhaust Vent
Terminal
Separated Combustion 2-Pipe Venting Kit - Vertical
Furnace Size 100 - 150 mbh
Kit contents: (2) 4 inch vent terminal (2) 6 inch vent terminal
All measurements shown are diameters.
The venting parts listed above are supplied by Greenheck.
All vent piping is FIELD SUPPLIED by others.
3. The vent must terminate at least 12 inches above
and 12 inches horizontally from the combustion air
inlet.
C
B
A1
A
A
Tee with drip leg and
cleanout cap.
200 - 400 mbh
17
A
Combustion Air
Inlet Terminal