Rinnai 223183 Concentric Universal Horizontal Termination, 11.5"
Concentric ventilation system for Rinnai tankless water heaters
Rinnai's unique Ubbink concentric venting system offers maximum performance and safety while still being easy to install. Compatible with all indoor Rinnai water heaters, except the 98 series which uses separate intake and exhaust venting.
Plastic Outer Vent For Intake
Aluminum Inner Vent For Exhaust
Available concentric water heater vent fittings