Rinnai Sensei 8.9 GPM Commercial 160,000 BTU Propane/Natural Gas。NEW Rinnai RX160iN Condensing Smart Sense Natural Gas or Propane。Rinnai RX160iN Sensei RX Series Indoor/Outdoor Natural Gas/Propane。Rinnai - CX160iN - SENSEI CX Series Built for the PRO Commercial。