Brochure

Venting to Meet Every
Commercial Application
The Following Vent Options
are Available:
• Direct Vent with Concentric Pipe*
• Direct Vent with Twin Pipe
• Common Vent
• Room Air
Now Including 2" Venting
up to 65' Vent Runs
• Fewer Wall or Roof Penetrations
• Simplifies Handling and Installation
• Reduced Material Costs
• Easier Routing of Vents
*HE+ Series tankless water heaters must use concentric venting with a metal exhaust pipe. Refer to the Installation and Operation Manual supplied with the HE+ Tankless Water Heater for venting options
CONCENTRIC
Diameter Equivalent Length Termination
3"/5"
150' (46 m) Vertical or Horizontal
2"/4" (New)
65' (20 m)
Vertical or Horizontal
TWIN PIPE AND ROOM AIR
Diameter Material Equivalent Length Termination
3"
PP, PVC, CPVC 150' (46 m) Vertical or Horizontal
2" (New)
PP, PVC, CPVC 65' (20 m)
Vertical or Horizontal
EXHAUST
COMBUSTION
AIR
Concentric Pipe
Combustion air and exhaust vent
directly through a single concentric
connection. Hot exhaust exits
through the interior tube, while
combustion air enters through the
outer layer.
Twin Pipe
Combustion air and exhaust vent
directly through separate
penetrations.
DIRECT VENT (Concentric Pipe and Twin Pipe)
1
EXHAUST
COMBUSTION
AIR
COMBUSTION
AIR
EXHAUST
COMBUSTION AIR
ROOM AIR
FOR COMBUSTION
EXHAUST
Direct Vent
Multiple water heaters sharing a combustion air header and a separate exhaust
header that vents directly through separate penetrations to
the outside.
Non-Direct (Room Air) Vent
Multiple water heaters using room air for combustion while sharing an exhaust
header that vents directly to the outside.
COMMON VENT (Indoor Units Only. Direct Vent and Non-Direct / Room Air Vent)
Room Air
Room air is used for combustion
while exhaust vents to the outside.
External (Outdoor)
Exterior models - no venting
required.
NONDIRECT VENT ROOM AIR AND EXTERNAL
2
EXHAUST
COMBUSTION
AIR
EXHAUST
COMBUSTION
AIR
3
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