Rinnai 223182 Universal Concentric Horizontal Termination Kit, 21"
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. This part number 223182, supercedes STDKITVA-S21 and STDKITVA-A21.
• 21 inches long
Plastic Outer Vent For Intake
Aluminum Inner Vent For Exhaust
Available concentric water heater vent fittings