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Rinnai Ultra Series Tankless Water Heaters deliver innovation and technological leadership in condensing tankless water heating design, while providing homeowners with an endless supply of hot water, energy savings, a space-saving design and environmental benefits. The NEW RUCS65i at 130,000 BTUs, available in natural gas and propane, offers condensing technology with lower capacity at attractive price points. As the only manufacturer to offer both concentric and PVC/CPVC dual pipe venting options on the same unit, the RUCS models join the Ultra Series lineup of innovative designs and enduring values.

  • Delivers an endless supply of hot water whenever and wherever it’s needed – simultaneously to multiple fixtures.
  • The ONLY manufacturer to offer both Concentric and PVC, providing more venting options right out of the box saving you time, money and the best flexibility to get the job done fast.
  • Up to .96 Energy Factor (ENERGY STAR® qualified)
  • Similar in size to a carry-on suitcase, our space-saving design allows installation almost anywhere.
  • Earth-friendly technology produces lower CO2 emissions which contribute to cleaner air and a healthier environment.
  • Min. BTU Input - 10,300
  • Max. BTU Input - 130,000
  • Warranty (Residential) - Limited 12-year on heat exchanger, 5-year on parts, 1-year on labor (5-year optional on labor)

These new Rinnai RUCS Condensing Tankless Water Heaters expand Rinnai’s Ultra Series condensing lineup to 6 models, in both indoor and outdoor versions, ranging from 130,000 to 199,000 BTU with efficiencies from .93 EF to .96 EF, providing the most complete condensing lineup in the industry.

Need this water heater installed? Rinnai can help! Simply call 844.348.4715.
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Product Type:
Tankless Heater
Installation Type:
Indoor Only
Fuel Type:
Energy Star Rated:
Energy Factor:
BTU Input:
Temperature Range (F):
120°F to 140°F
Flow Range (GPM):
0.26 - 6.5
Gas Connection:
Cold Water Inlet (NPTM):
Hot Water Outlet (NPTF):
Height (Inches):
Width (Inches):
Depth (Inches):
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