Greenheck IGX Installation, Operation And Maintenance Manual page 15

Venting Instructions:
Concentric Venting - Vertical
1. The vent must terminate with the vent terminal,
supplied in the vent kit.
2. The combustion air pipe must terminate with the
cap (supplied in the venting kit). This cap is specially
designed to work with the concentric vent system.
The venting kit includes the concentric adapter box,
vent termination cap, and an air inlet terminal.
3. The bottom of the air intake pipe must terminate
above the snow line, or at least 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 = 12 inches
C = Field supplied mounting brackets
Building Roof
Separated Combustion Concentric Venting Kit - Vertical
Furnace Size 100 - 150 mbh
Kit contents: (1) 4 inch vent terminal (1) 6 inch vent terminal
(1) 6 inch inlet terminal (1) 8 inch inlet terminal
(1) concentric adapter
All measurements shown are diameters.
The venting parts listed above are supplied by Greenheck.
All vent piping is FIELD SUPPLIED by others.
4. The bottom of the vent cap must terminate at least
12 inches above the top of the air intake cap.
5. To attach the caps, slide the combustion air cap
over the vent pipe and fasten it to the combustion
air pipe with at least 3 non corrosive fastener.
6. Caulk the gap between the combustion air cap and
the vent pipe with silicone sealant, or other
appropriate sealants suitable for metal to metal
contact and temperatures of 350 degrees F.
B
C
A
A
Tee with drip leg and
cleanout cap
200 - 400 mbh
(1) concentric adapter
15
Exhaust Vent Terminal
Combustion Air Inlet
Terminal
A1
C