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Rinnai

Rinnai tankless water heaters deliver endless hot water with compact, efficient designs. Build the right system with indoor or outdoor models in natural gas or propane, condensing or non-condensing, recirculation options, clean venting, and the install parts to finish the job.

Shop by category

  • Condensing (SENSEI series): high-efficiency indoor/outdoor units; concentric or 2-pipe venting
  • Non-condensing: value models for simple replacements and mild climates
  • Recirculation: built-in pump models, recirc-ready units, crossover/bypass kits, timers and controls
  • Venting & covers: concentric and twin-pipe kits, terminations, pipe covers, wall thimbles
  • Controls: wall remotes and optional Wi-Fi/app modules
  • Install & service parts: isolation/flush valve kits, filters, condensate neutralizers, NG/LP conversion kits, repair parts

Quick choosing guide

  1. Size by demand: total peak fixtures and calculate GPM at your winter temperature rise; select a unit that meets that flow on the spec curve.
  2. Pick location & fuel: indoor with a vent route or outdoor where climate allows; choose natural gas or propane and confirm gas line capacity.
  3. Efficiency: choose condensing for higher efficiency (plan a condensate drain/neutralizer) or non-condensing for straightforward replacements.
  4. Faster hot water: pick a built-in recirc model or add a recirc kit to a recirc-ready unit; set schedules to reduce wait time.
  5. Venting: select concentric or 2-pipe per the manual; follow clearances and use approved materials and terminations.
  6. Complete the kit: install isolation/flush valves, pipe cover if desired, controller/Wi-Fi, sediment filter, and proper electrical/gas shutoff.


  •

    Rinnai - MIVK-T-LW - Matsui Plumbing Isolation Valve Kit

    Rinnai
    $ 93.00 - $ 93.00
    $ 93.00
    $ 93.00 - $ 93.00
    $ 93.00

    Rinnai Isolation Valve Kit The Rinnai MVIK-T-LW tankless water heater valve kit facilitates a streamlined, two-step installation process for your ...

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    $ 93.00 - $ 93.00
    $ 93.00
    $ 93.00 - $ 93.00
    $ 93.00

  • Rinnai - 107000450 - Sensei Dedicated Return Valve

    Rinnai
    $ 114.00 - $ 114.00
    $ 114.00
    $ 114.00 - $ 114.00
    $ 114.00

    Dedicated Recirculation Valve for RUR, replaces Cold Isolation ValveIncludes: Tee Check valve Drain valve Isolation valve for return line

    $ 114.00 - $ 114.00
    $ 114.00
    $ 114.00 - $ 114.00
    $ 114.00

  • Rinnai - 105000250 - Sensei External Pump Harness

    Rinnai
    $ 15.00 - $ 15.00
    $ 15.00
    $ 15.00 - $ 15.00
    $ 15.00

    Rinnai Sensei Pump Harness External Recirculation Pump Wire Harness (Part Number 105000250) is the essential accessory you need when adding an exte...

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    $ 15.00 - $ 15.00
    $ 15.00
    $ 15.00 - $ 15.00
    $ 15.00
  • Rinnai EX22CN Natural Gas Direct Vent Wall Furnace
    Rinnai EX22CN Natural Gas Direct Vent Wall Furnace

    Rinnai EX22DTN Natural Gas Direct Vent Wall Furnace

    Rinnai
    $ 2,325.40 - $ 2,325.40
    $ 2,325.40
    $ 2,325.40 - $ 2,325.40
    $ 2,325.40

    Rinnai EX22DTN Direct Vent Wall Furnace – Natural Gas (NG), Beige The Rinnai EX22DTN delivers efficient, quiet Natural Gas heating in a compact, w...

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    $ 2,325.40 - $ 2,325.40
    $ 2,325.40
    $ 2,325.40 - $ 2,325.40
    $ 2,325.40
  • Rinnai EX17CP Propane Direct Vent Wall Furnace
    Rinnai - Rinnai EX17CP Propane Direct Vent Wall Furnace - - - Big Frog Supply - 1

    Rinnai - EX17DTP - Propane Direct Vent Wall Furnace

    Rinnai
    $ 2,102.10 - $ 2,102.10
    $ 2,102.10
    $ 2,102.10 - $ 2,102.10
    $ 2,102.10

    Rinnai EX17DTP Direct Vent Wall Furnace – Propane (LP), Beige The Rinnai EX17DTP provides efficient propane heating for medium-size rooms in a cle...

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    $ 2,102.10 - $ 2,102.10
    $ 2,102.10
    $ 2,102.10 - $ 2,102.10
    $ 2,102.10
  • Rinnai EX17CN Natural Gas Direct Vent Wall Furnace

    Rinnai - EX17DTN - Natural Gas Direct Vent Wall Furnace

    Rinnai
    $ 2,102.10 - $ 2,102.10
    $ 2,102.10
    $ 2,102.10 - $ 2,102.10
    $ 2,102.10

    Rinnai EX17DTN Direct Vent Wall Furnace – Natural Gas (NG), Beige The Rinnai EX17DTN provides efficient Natural Gas heating in a compact, wall-mou...

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    $ 2,102.10 - $ 2,102.10
    $ 2,102.10
    $ 2,102.10 - $ 2,102.10
    $ 2,102.10
  • Rinnai EX11CN Natural Gas Direct Vent Wall Furnace
    Rinnai EX11CN Natural Gas Direct Vent Wall Furnace

    Rinnai - EX11DTN - Natural Gas Direct Vent Wall Furnace

    Rinnai
    $ 1,757.70 - $ 1,757.70
    $ 1,757.70
    $ 1,757.70 - $ 1,757.70
    $ 1,757.70

    Rinnai EX11DTN Direct Vent Wall Furnace – Natural Gas (NG), Beige The Rinnai EX11DTN delivers efficient, quiet Natural Gas heating in a compact, w...

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    $ 1,757.70 - $ 1,757.70
    $ 1,757.70
    $ 1,757.70 - $ 1,757.70
    $ 1,757.70
  • Tankless Water Heater - Rinnai EX08CN Natural Gas Direct Vent Wall Furnace
    Tankless Water Heater - Rinnai EX08CN Natural Gas Direct Vent Wall Furnace

    Rinnai - EX08DTN - Natural Gas Direct Vent Wall Furnace

    Rinnai
    $ 1,469.30 - $ 1,469.30
    $ 1,469.30
    $ 1,469.30 - $ 1,469.30
    $ 1,469.30

    Rinnai EX08DTN Direct Vent Wall Furnace – Natural Gas (NG), Beige The Rinnai EX08DTN provides compact, efficient Natural Gas heating in a quiet wa...

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    $ 1,469.30 - $ 1,469.30
    $ 1,469.30
    $ 1,469.30 - $ 1,469.30
    $ 1,469.30
  • Rinnai EX08CP Propane Direct Vent Wall Furnace
    Rinnai EX08CP Propane Direct Vent Wall Furnace

    Rinnai - EX08DTP - Propane Direct Vent Wall Furnace

    Rinnai
    $ 1,469.30 - $ 1,469.30
    $ 1,469.30
    $ 1,469.30 - $ 1,469.30
    $ 1,469.30

    Rinnai EX08DTP Direct Vent Wall Furnace – Propane (LP), Beige The Rinnai EX08DTP delivers efficient propane heating in a compact, whisper-quiet de...

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    $ 1,469.30 - $ 1,469.30
    $ 1,469.30
    $ 1,469.30 - $ 1,469.30
    $ 1,469.30

  • Rinnai V53DeN V Series High Efficiency Tankless Water Heater

    Rinnai
    $ 741.65 - $ 741.65
    $ 741.65
    $ 741.65 - $ 741.65
    $ 741.65

    Rinnai V53DeN High Efficiency Water Heater Experience the perfect combination of efficiency and value with the Rinnai V53DeN Non-Condensing Tankles...

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    $ 741.65 - $ 741.65
    $ 741.65
    $ 741.65 - $ 741.65
    $ 741.65

  • Rinnai - V53DeP - V Model Series High Efficiency Tankless Water Heater by Rinnai

    Rinnai
    $ 741.65 - $ 741.65
    $ 741.65
    $ 741.65 - $ 741.65
    $ 741.65

    Rinnai V53DeP Propane Tankless Water Heater The Rinnai V53DEP High Efficiency Outdoor Tankless Heater delivers the perfect blend of continuous hot ...

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    $ 741.65 - $ 741.65
    $ 741.65
    $ 741.65 - $ 741.65
    $ 741.65

  • Rinnai - 227412NPP - 2/4 Condensing Vertical Starter Adapter

    Rinnai
    $ 56.00 - $ 56.00
    $ 56.00
    $ 56.00 - $ 56.00
    $ 56.00

    Rinnai 2/4 Condensing Vertical Starter Adapter Weight: 1.39lbs Height: 5.63" Width: 5.71" Depth: 9.92"

    $ 56.00 - $ 56.00
    $ 56.00
    $ 56.00 - $ 56.00
    $ 56.00

  • Rinnai - 229309NPP - 2 in. / 4 in. x 19.5in. Plastic Condensing Vent Pipe Extension Kit

    Rinnai
    $ 29.99 - $ 29.99
    $ 29.99
    $ 29.99 - $ 29.99
    $ 29.99

    Concentric venting allows for secure connection 2 in. / 4 in. condensing vent pipe extension 19.5 in For use with Sensei Se+ tankless water heater...

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    $ 29.99 - $ 29.99
    $ 29.99
    $ 29.99 - $ 29.99
    $ 29.99

  • Rinnai - 229308NPP - 2 in. / 4 in. x 10 in. Plastic Condensing Vent Pipe Extension Kit

    Rinnai
    $ 33.79 - $ 33.79
    $ 33.79
    $ 33.79 - $ 33.79
    $ 33.79

    Concentric venting allows for secure connection 2 in. / 4 in. condensing vent pipe extension 10 in For use with Sensei Se+ tankless water heaters ...

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    $ 33.79 - $ 33.79
    $ 33.79
    $ 33.79 - $ 33.79
    $ 33.79

  • Rinnai - 229230NPP - 10 in. 2/4 Condensing 90 Degree Elbow for Tankless Water Heaters

    Rinnai
    $ 24.25 - $ 24.25
    $ 24.25
    $ 24.25 - $ 24.25
    $ 24.25

    2/4 Condensing Vent Pipe Extension 10 in For Sensei Models Product Weight: 0.57 Height: 5.9" Width: 4.33" Depth: 6.29" Refer to the R...

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    $ 24.25 - $ 24.25
    $ 24.25
    $ 24.25 - $ 24.25
    $ 24.25

  • Rinnai - 229205NPP - Condensing 2/4 45 Degree Elbow (2 Pack) for Tankless Water Heaters 229205NPP

    Rinnai
    $ 50.75 - $ 50.75
    $ 50.75
    $ 50.75 - $ 50.75
    $ 50.75

    For use with Sensei Se+ tankless water heaters (condensing) and m-series boilers. Refer to the Rinnai Water Heater Installation and Operation man...

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    $ 50.75 - $ 50.75
    $ 50.75
    $ 50.75 - $ 50.75
    $ 50.75

  • Rinnai - 229013NPP - 2/4 21 Inch Condensing Horizontal Termination Kit

    Rinnai
    $ 81.00 - $ 81.00
    $ 81.00
    $ 81.00 - $ 81.00
    $ 81.00

    2 in. / 4 in. condensing horizontal termination kit 21 in. For use with Sensei Se+ tankless water heaters (condensing) and m-series boilers White ...

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    $ 81.00 - $ 81.00
    $ 81.00
    $ 81.00 - $ 81.00
    $ 81.00

  • Rinnai - 229012NPP - 12 Inch 2/4 Condensing Horizontal Termination Kit

    Rinnai
    $ 72.99 - $ 72.99
    $ 72.99
    $ 72.99 - $ 72.99
    $ 72.99

    2/4 Cond Horiz Termination Kit 12in Brand Model Compatibility SE+ Tankless Water Heaters and M-Series Boilers Diameter 4 in Lengt...

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    $ 72.99 - $ 72.99
    $ 72.99
    $ 72.99 - $ 72.99
    $ 72.99

  • Rinnai - 710342 - 3/5 Rubber Wall Plate White

    Rinnai
    $ 9.00 - $ 9.00
    $ 9.00
    $ 9.00 - $ 9.00
    $ 9.00

    Rubber Wall Plate (White) Wall Plate for Rinnai's unique Ubbink concentric venting system provides ease of installation. Compatible with all indoo...

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    $ 9.00 - $ 9.00
    $ 9.00
    $ 9.00 - $ 9.00
    $ 9.00

  • Rinnai - 242141 - Flashing for Metal Roof - Plastic

    Rinnai
    $ 108.98 - $ 108.98
    $ 108.98
    $ 108.98 - $ 108.98
    $ 108.98

    Flashing for Metal Roof For metal roof installations. Zero clearance to combustibles. Material: Plastic UPC: 8713645120461 Height: 2.5" Width...

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    $ 108.98 - $ 108.98
    $ 108.98
    $ 108.98 - $ 108.98
    $ 108.98

  • Rinnai - 187595NPP - 2in x 2/4 Condensing Twin Pipe Adaptor

    Rinnai
    $ 92.00 - $ 92.00
    $ 92.00
    $ 92.00 - $ 92.00
    $ 92.00

    Features: Twin pipe adapter 2 in. x 2/4 Dimensions: 5.67 in. x 9.92 in. x 14.4 in. Water heater accessory For use with SENSEI SE+ tankless water h...

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    $ 92.00 - $ 92.00
    $ 92.00
    $ 92.00 - $ 92.00
    $ 92.00
  • Sold out

    Rinnai - 103000079 - Natural Gas to LP Gas Conversion Kit for RU180e Tankless Water Heater

    Rinnai
    $ 45.00 - $ 45.00
    $ 45.00
    $ 45.00 - $ 45.00
    $ 45.00

    Quick-n Easy Gas Conversion Remove 3 screws, change the orifice, parameter, and apply the new data plate Model Compatibility Conversion NG LPG...

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    $ 45.00 - $ 45.00
    $ 45.00
    $ 45.00 - $ 45.00
    $ 45.00
    Sold out

  • Rinnai - 103000083 - Natural Gas to LP Gas Conversion Kit for RU130e Tankless Water Heater

    Rinnai
    $ 45.00 - $ 45.00
    $ 45.00
    $ 45.00 - $ 45.00
    $ 45.00

    Quick-n Easy Gas Conversion Remove 3 screws, change the orifice, parameter, and apply the new data plate Model Compatibility Conversion NG LPG...

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    $ 45.00 - $ 45.00
    $ 45.00
    $ 45.00 - $ 45.00
    $ 45.00

  • Rinnai 103000082 Natural Gas to LP Gas Conversion Kit for RU130i Tankless Water Heater

    Rinnai
    $ 45.00 - $ 45.00
    $ 45.00
    $ 45.00 - $ 45.00
    $ 45.00

    Quick-n Easy Gas Conversion For RU103i Tankless Water Heater Simply remove 3 screws, change the orifice, parameter, and apply the new data plate ...

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    $ 45.00 - $ 45.00
    $ 45.00
    $ 45.00 - $ 45.00
    $ 45.00

Pro tips: Size from the coldest inlet temperature, verify gas line capacity and vent route before mounting, and neutralize condensate on condensing models. Add isolation valves for easy descaling, set recirc schedules, and register your unit for warranty. Not sure which Rinnai and kit you need? Tell us fuel type, location, and demand—we will build a dialed-in list.

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