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Rinnai RUC80IP 8.0 GPM Indoor Ultra-NOx Condensing Tankless Propane Water Heater

by Rinnai
Sold out
Original price $ 1,718.00
Current price $ 1,259.00

Rinnai Ultra Series Tankless Water Heaters deliver innovation and technological leadership in condensing tankless water heating design. Providing homeowners with an endless supply of hot water, energy savings, a space saving design and environmental benefits, Rinnai offers ease of installation now with more venting options right out of the box. As the only manufacturer to offer both concentric and twin-pipe PVC venting, no adaptor is necessary to give you double the venting options on every installation. One unit. Two venting options. From one project to the next, with the RUC line of Ultra Series Tankless Water Heaters the freedom of choice is yours - right out of the box.


  • 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.



Width: 18.5 inches (469.9mm)

Height: 26 inches (660.4mm)

Depth: 10 inches (254mm)


61.7 lbs (28.0 kg)

Installation Type


Minimum/Maximum BTU

15,200 / 152,000 Natural Gas

Energy Factor

0.96 for Propane

Temperature Range

Residential: 98°F - 140°F (37°C - 60°C)

Commercial: 98° F - 185° F (37°C - 85°C)**

Minimum Activation Rate

0.4 gpm (1.5 lpm)

Flow Rate (70 / 50 degree rise)

4.2 / 5.9 gpm (15.9 / 22.3 lpm)

Hot Water Flow Rate Range

0.26 - 8.0 gpm (0.98 - 30.3 lpm)


Standard: Integrated

Optional: MC-195T-US, MC-100V-1US, BC-100V-1US, MCC-91-2US

Ultra Low NOx


Warranty (Residential)*

Limited 12-year on heat exchanger, 5-year on parts, 1-year on labor (5-year optional on labor)

Warranty (Commercial)*

Limited 5-year on heat exchanger, 5-year on parts, 1-year on labor (2-year optional on labor)

Mobile Home Certified


Valves Shipped in Box


High Altitude Approved

Up to 10,200 ft. (3,109 m)


AHRI, CSA, Energy Star®


Venting Options

Concentric or PVC / CPVC

Tankless Rack System (TRS/TRW) Compatible


1/2" Gas Line Compatible***



FTC Energy Guide

Rinnai is continually updating and improving products; therefore, specifications are subject to change without prior notice. Local, state, provincial and federal codes must be adhered to prior to installation.