Rinnai Ultra Tankless Water Heater RUC80iN

Manufacturer SKU: RUC80iN
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Price: $1,718.00 $1,168.24
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Additional Documents


  • Width: 18.5"
  • Height: 26"
  • Depth: 10"
  • Hot water flow range: .26-8 gpm
  • MC-91-2US controller included
  • Residential Warranty: Limited 12-year on heat exchanger, 5-year on parts, 1-year on labor (5-year optional on labor)
  • Commercial Warranty: Limited 5-year on heat exchanger, 5-year on parts, 1-year on labor (2-year optional on labor)
  • Certifications: AHRI, UPC, CSA, NSF, UMC, Energy Star®
  • PVC,and Concentric PP Venting Options

This product is also listed as:

*Represents a discontinued option for this product


Activation GPM: 0.4
BTU/hr Min: 15200
Connection: ¾” NPT
Electrical Supply: 115 Volts - 1 Phase - 60 Hertz
Energy Efficiency: 94.00
Hertz: 60 Hz
Water Pressure / Max PSI: 150
Water Pressure / Min PSI: 15
Volts: 120
Fuel Type: Gas
Gas Connection Type: 3/4" MNPT
Water Connection Type: 3/4" MNPT
Amperage: 3.58
BTU/hr Max: 152000
Flow Rate: .26
Remote Included: Yes
Electronic: Yes
Energy Star: Yes

Customer Reviews

Latest Reviews for the Rinnai Ultra Tankless Water Heater RUC80iN

1 Reviews
5 out of 5

3/24/2015 1:45:13 PM

Overall Rating:
Ease of Install:


Pros:Easy to Install,Great Design,Functional,Works Great
Other Thoughts:Just installed an 80 Gal. whirlpool tub and would have to have a huge tank water heater to fill it. This unit works nice for that, and I can preset the water temp and not have to blend hot and cold water. Installation was fairly easy, nothing too complicated. It took one full day to remove the old tank unit and install the new tankless completely

Product Q&A

Other Customers have asked these questions.

(1 questions about this product)
does this include thermostat and exhaust and fresh air piping? as well as water and gas values. if not what do is needed to complete install?
This unit will require the installer to provide the exhaust and intake, and I would recommend contacting Rinnai's tech support line and speak with their applications department to figure out what would be best for your installation. This unit includes the gas valve, but you would need to install a shut off valve in front of the unit in order to service the equipment. Finally, you would need the Rinnai isolation kit WIRK-LF-F, or similar. Sorry if this is a lot of information, but again, I would recommend speaking to Rinnai to determine what is best for your application.
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