Select A Vent Type - Rinnai Demand Duo CHS199100CUiP Installation And Operation Manual

Select a Vent Type

Three types of venting options are available:
1
Direct Vent
Combustion air and exhaust vent directly through
a single concentric connection. Hot exhaust exits
through the interior tube, while combustion air
2
Non-Direct Vent
Room air is used for combustion while exhaust
vents to the outside.
Combustion
3
Common Vent
Multiple water heaters sharing a combustion air
header and a separate exhaust header that vents
directly through separate penetrations to the outside.
Rinnai Commercial Hybrid System Installation and Operation Manual
(Concentric Pipe and Twin Pipe)
Concentric Pipe
Exhaust
Combustion
Combustion
air
(Room Air)
Exhaust
air
(Indoor Units Only. Direct Vent and Non-Direct/Room Air Vent)
Direct Vent
Combustion Air
Combustion air and exhaust vent directly
air
Multiple water heaters using room air for
combustion while sharing an exhaust header that
vents directly to the outside.
Exhaust
Twin Pipe
Combustion
air
Exhaust
Vent
Non-Direct (Room Air)
Exhaust
Room Air
For Combustion
17