Tankless Water Heater
Why Choose Us?
Rinnai's newest tankless addition incorporates condensing technology to create the most efficient most durable tankless water heater design on the market today. Available in two models suitable for mid-to large-sized homes Rinnai's new Condensing Tankless Water Heaters offer all the same benefits builders and homeowners have come to expect from Rinnai. The RU80i model numbers were recently changed from the RC80i units. Rinnai's unique condensing design incorporates two innovative heat exchangers. The system recaptures residual heat from flue gases to pre-heat incoming ground water which then circulates to the primary copper heat exchanger. Natural gas or propane.
!! You Must replace old vent with Concentric Vent/RU Series !!
Rinnai DOES NOT Sell any Electric Tankless
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How to flush Rinnai Tankless video
Capacity: Based on 70°F ground temperature. Customer has the option of using the following appliances instead of a shower: residential grade clothes washing machines or dishwashers. Shower heads assumed to be 2.5 gpm mixed flow rate or less. If customshower fixtures i.e. body sprays, large rain heads, or tubs over 60 gallons in capacity are used, please contact Rinnai. Bathroom sink faucets assumed to be 2 gpm mixed flow rate or less. Assumed mixed temperature on shower heads and bathroom sink faucets to be 104° F.Assumed Rinnai set point to be 120°F. Assumed 50 psi - 80 psi inlet water pressure for maximum flow.
Width: 18.3 Inches
Height: 26 Inches
Depth: 10 Inches
Hot Water Capacity
0.26 to 8.0 GPM
Minimum Activation Rate
Minimum/Maximum Gas Rate (Input BTUs )
15,200 - 152,000
0.96 for Natural Gas and Propane
Approved Gas Types
Natural Gas or Propane
98°F - 140°F with MC-91-2US
98° F - 185° F wit MCC-91-2US
Type of Controller
MCC-91-2US (optional for Commercial or Hydronic Applications)
MC-100V-1US Deluxe Controller (optional)
BC-100V-1US Bathroom Controller (optional)
Ultra Lox NOx
AC 120 Volts, 60 Hz
Normal: 42 Watts
Standby: 2 Watts
Anti-Frost Protection: 146 Watts
Gas Supply: 3/4 Inch MNPT
Cold Water Inlet: 3/4 Inch MNPT
Hot Water Outlet: 3/4 Inch MNPT