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Rinnai Sensei RX

Rinnai SENSEI® RX condensing tankless water heaters deliver endless hot water with quiet, high-efficiency performance. Choose indoor or outdoor models in natural gas or propane, with options for built-in or add-on recirculation, Wi-Fi/app control, and clean concentric or twin-pipe venting. Finish installs with vent kits, pipe covers, isolation valves, and maintenance accessories.

Shop by need

  • Location: indoor or outdoor enclosures with freeze protection (model dependent)
  • Fuel: natural gas or propane; conversion kits where specified
  • Recirculation: built-in pump models, recirc-ready units, crossover/bypass kits, timers and controls
  • Venting: concentric or 2-pipe PVC/CPVC/PP vent kits, terminations, and pipe covers
  • Controls: onboard scheduling, optional Wi-Fi/app modules, remote temperature control
  • Service & parts: isolation/flush valve kits, condensate neutralizers, filters, and repair parts

Quick choosing guide

  1. Size by demand: total peak fixtures and calculate GPM at your winter temperature rise. Pick an RX that meets that flow on the spec curve.
  2. Pick placement: Indoor for mechanical spaces with vent route; Outdoor where climate allows and venting isn’t practical.
  3. Decide on recirculation: choose a built-in pump model for the fastest hot water or add a recirc kit to a recirc-ready unit.
  4. Plan venting & condensate: select the correct concentric or twin-pipe kit and route a condensate drain/neutralizer for condensing operation.
  5. Complete the kit: add isolation/flush valves, pipe cover, controller/Wi-Fi module (if desired), and the right gas line size and shutoff.
  6. Maintenance: schedule periodic descaling/flush to protect the heat exchanger—especially in hard-water areas.


  •

    Rinnai Sensei RXP199i Condensing Indoor/Outdoor Tankless Water Heater with Recirculating Pump Natural Gas/Propane

    Rinnai
    $ 0.00 - $ 0.00
    $ 0.00
    $ 1,997.58
    $ 1,997.58 - $ 1,997.58
    $ 1,997.58

    Rinnai RxP199i Condensing Indoor/Outdoor Tankless Water Heater Say goodbye to running out of hot water with the Rinnai SENSEI RXP199iN Tankless Wat...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 1,997.58
    $ 1,997.58 - $ 1,997.58
    $ 1,997.58

  • Rinnai RX199iN Sensei Condensing Indoor/Outdoor Natural Gas/Propane Tankless Water Heater

    Rinnai
    $ 0.00 - $ 0.00
    $ 0.00
    $ 1,532.79
    $ 1,532.79 - $ 1,532.79
    $ 1,532.79

    Rinnai Sensei RX199iN Indoor/Outdoor Tankless Water Heater Rinnai introduces their Pro Build RX Series Tankless Water Heaters, featuring Adaptive G...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 1,532.79
    $ 1,532.79 - $ 1,532.79
    $ 1,532.79

  • Rinnai RXP160IN Sensei RX Condensing Recirculating Pro Series Indoor with Pump Natural Gas/Propane

    Rinnai
    $ 0.00 - $ 0.00
    $ 0.00
    $ 1,517.04
    $ 1,517.04 - $ 1,517.04
    $ 1,517.04

    Rinnai RXP160iN – Sensei RX Series Indoor Tankless Water Heater The Rinnai RXP160iN is built for homeowners who want dependable performance, intell...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 1,517.04
    $ 1,517.04 - $ 1,517.04
    $ 1,517.04

  • Rinnai RX180iN Sensei Indoor/Outdoor Tankless Water Heater Natural Gas/Propane

    Rinnai
    $ 0.00 - $ 0.00
    $ 0.00
    $ 1,409.94
    $ 1,409.94 - $ 1,409.94
    $ 1,409.94

    Rinnai RX180iN – Sensei RX Series Indoor Tankless Water Heater The Rinnai RX180iN delivers powerful, efficient hot water performance for medium-to...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 1,409.94
    $ 1,409.94 - $ 1,409.94
    $ 1,409.94

  • Rinnai RX160iN Sensei RX Series Indoor/Outdoor Natural Gas/Propane Tankless Water Heater

    Rinnai
    $ 0.00 - $ 0.00
    $ 0.00
    $ 1,298.43
    $ 1,298.43 - $ 1,298.43
    $ 1,298.43

    Rinnai Sensei RX160iN Natural Gas/Propane Tankless Water Heater Rinnai RX160iN Tankless Water Heater features Adaptive Gas Valve Technology that al...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 1,298.43
    $ 1,298.43 - $ 1,298.43
    $ 1,298.43

  • Rinnai -RX130iN- Sensei RX Condensing Series Pro Build Indoor without Pump Natural Gas/Propane

    Rinnai
    $ 0.00 - $ 0.00
    $ 0.00
    $ 1,137.78
    $ 1,137.78 - $ 1,137.78
    $ 1,137.78

    Rinnai introduces its Adaptive Gas Valve Technology in the Sensei RX Pro Built Series  Rinnai introduces their Pro Build RX Series Tankless Water H...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 1,137.78
    $ 1,137.78 - $ 1,137.78
    $ 1,137.78
  • Rinnai - Rinnai Digial Recirculation Controller MC-195T-US - - Water Heater Controllers - Big Frog Supply

    Rinnai MC-195T-US Digital Recirculation Controller

    Rinnai
    $ 275.30 - $ 275.30
    $ 275.30
    $ 275.30 - $ 275.30
    $ 275.30

    Rinnai Recirculation Controller Rinnai MC-195T-US Digital Recirculation Controller brings added convenience and flexibility to your compatible Rinn...

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    $ 275.30 - $ 275.30
    $ 275.30
    $ 275.30 - $ 275.30
    $ 275.30

  • Rinnai Pipe Cover PCD11-SHS fits Sensei RX

    Rinnai
    $ 0.00 - $ 0.00
    $ 0.00
    $ 231.00
    $ 231.00 - $ 231.00
    $ 231.00

    Rinnai Sensei RX Pipe Cover Give your tankless water heater installation a clean, finished look with the Rinnai PCD11-SHS Pipe Cover Enclosure. Thi...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 231.00
    $ 231.00 - $ 231.00
    $ 231.00

  • Rinnai - 107000639 - Dedicated Return & Isolation Valve Kit

    Rinnai
    $ 0.00 - $ 0.00
    $ 0.00
    $ 162.85
    $ 162.85 - $ 162.85
    $ 162.85

    Valve kit including tee, drain valve, pressure relief valve, check valve & isolation valves (cold & hot) to simplify set-up of a dedicated ...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 162.85
    $ 162.85 - $ 162.85
    $ 162.85

  • Rinnai 804000074 Condensate Neutralizer Kit

    Rinnai
    $ 151.05 - $ 151.05
    $ 151.05
    $ 151.05 - $ 151.05
    $ 151.05

    Rinnai Condensate Neutralizer Kit The Rinnai 804000074 Condensate Neutralizer Kit is designed to provide reliable and efficient performance, design...

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    $ 151.05 - $ 151.05
    $ 151.05
    $ 151.05 - $ 151.05
    $ 151.05

  • Rinnai RWM200 Wireless Wifi Module

    Rinnai
    $ 0.00 - $ 0.00
    $ 0.00
    $ 150.00
    $ 150.00 - $ 150.00
    $ 150.00

    Rinnai RWM200 WiFi Module The Rinnai RWM200 Wireless Module connects you to your Rinnai tankless water heater from virtually anywhere, giving you c...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 150.00
    $ 150.00 - $ 150.00
    $ 150.00

  • Rinnai MC-601-W Temperature Controller MC-601, White

    Rinnai
    $ 139.00 - $ 139.00
    $ 139.00
    $ 139.00 - $ 139.00
    $ 139.00

    The MC-601-W Temperature Controller is made from premium materials, and offers great function and value for your home. The MC-601-W is part of Rinn...

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    $ 139.00 - $ 139.00
    $ 139.00
    $ 139.00 - $ 139.00
    $ 139.00

  • Rinnai - MC-601-BK - Controller MC-601, Black

    Rinnai
    $ 139.00 - $ 139.00
    $ 139.00
    $ 139.00 - $ 139.00
    $ 139.00

    Instruction The MC-601-BK is made from premium materials, this Item offers great function and value for your home. This fixture is part of Rinnai...

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    $ 139.00 - $ 139.00
    $ 139.00
    $ 139.00 - $ 139.00
    $ 139.00

  • 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 229032 - 2/4" Condensing Horizontal Termination Kit, 21" (PPtl) fits SENSEI RX

    Rinnai
    $ 0.00 - $ 0.00
    $ 0.00
    $ 78.00
    $ 78.00 - $ 78.00
    $ 78.00

    Ubbink Polypropylene concentric venting delivers a professional solution with improved safety and convenience.  For use with the following models: ...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 78.00
    $ 78.00 - $ 78.00
    $ 78.00

  • Rinnai Bottom plate for Pipe Cover 109001364 Fits Sensei RX

    Rinnai
    $ 0.00 - $ 0.00
    $ 0.00
    $ 67.00
    $ 67.00 - $ 67.00
    $ 67.00

    Rinnai Bottom plate for Pipe Cover  109001364 Fits Sensei RX

    $ 0.00 - $ 0.00
    $ 0.00
    $ 67.00
    $ 67.00 - $ 67.00
    $ 67.00
  • Sold out

    Rinnai 224359- 2/4" Condensing Roof Discharge Termination, 20" (Above Roof) (PPtl) fits SENSEI RX

    Rinnai
    $ 0.00 - $ 0.00
    $ 0.00
    $ 64.98
    $ 64.98 - $ 64.98
    $ 64.98

    Ubbink Polypropylene concentric venting delivers a professional solution with improved safety and convenience. 2/4 in. (60/100) Ubbink Vent Compone...

    View full details
    $ 0.00 - $ 0.00
    $ 0.00
    $ 64.98
    $ 64.98 - $ 64.98
    $ 64.98
    Sold out

  • Rinnai 229031 - 12", 2"/4" Condensing Horizontal Termination Kit (PPtl) fits SENSEI RX

    Rinnai
    $ 0.00 - $ 0.00
    $ 0.00
    $ 62.17
    $ 62.17 - $ 62.17
    $ 62.17

    Ubbink Polypropylene concentric venting delivers a professional solution with improved safety and convenience.  For use with the following models...

    View full details
    $ 0.00 - $ 0.00
    $ 0.00
    $ 62.17
    $ 62.17 - $ 62.17
    $ 62.17

  • Rinnai Outdoor Vent Cap RXOVC for Sensei RX series units

    Rinnai
    $ 0.00 - $ 0.00
    $ 0.00
    $ 46.90
    $ 46.90 - $ 46.90
    $ 46.90

    Rinnai Outdoor Vent Cap The Rinnai Sensei Outdoor Versa-Vent Cap RXOVC is the essential accessory that instantly converts any Rinnai Sensei RX Seri...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 46.90
    $ 46.90 - $ 46.90
    $ 46.90

  • Rinnai RPB200 On-Demand Recirculation via Push Button

    Rinnai
    $ 0.00 - $ 0.00
    $ 0.00
    $ 45.00
    $ 45.00 - $ 45.00
    $ 45.00

    The Rinnai RWM200 Wireless Module lets homeowners experience the ultimate in accessibility, convenience, and control. Using the Rinnai Central app ...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 45.00
    $ 45.00 - $ 45.00
    $ 45.00
  • Sold out

    Rinnai 229320- 39" 2/4 Condensing Vent Pipe Extension (PPtl) fits SENSEI RX

    Rinnai
    $ 0.00 - $ 0.00
    $ 0.00
    $ 41.99
    $ 41.99 - $ 41.99
    $ 41.99

    Ubbink Polypropylene concentric venting delivers a professional solution with improved safety and convenience. 2/4 in. (60/100) Ubbink Vent Compone...

    View full details
    $ 0.00 - $ 0.00
    $ 0.00
    $ 41.99
    $ 41.99 - $ 41.99
    $ 41.99
    Sold out
  • Sold out

    Rinnai 2/4" Condensing 45-degree Elbow (2 Pack) (PPtl) fits SENSEI RX

    Rinnai
    $ 0.00 - $ 0.00
    $ 0.00
    $ 37.06
    $ 37.06 - $ 37.06
    $ 37.06

    Ubbink Polypropylene concentric venting delivers a professional solution with improved safety and convenience. 2/4 in. (60/100) Ubbink Vent Compon...

    View full details
    $ 0.00 - $ 0.00
    $ 0.00
    $ 37.06
    $ 37.06 - $ 37.06
    $ 37.06
    Sold out
  • Sold out

    Rinnai 229033 - 2/4" Condensing Wall Termination, 21" w/ 2 Wall Plates (PPtl) fits SENSEI RX

    Rinnai
    $ 0.00 - $ 0.00
    $ 0.00
    $ 32.99
    $ 32.99 - $ 32.99
    $ 32.99

    Ubbink Polypropylene concentric venting delivers a professional solution with improved safety and convenience.  For use with the following models: ...

    View full details
    $ 0.00 - $ 0.00
    $ 0.00
    $ 32.99
    $ 32.99 - $ 32.99
    $ 32.99
    Sold out
  • Sold out

    Rinnai 229319- 2/4" x 19.5" Condensing Vent Pipe Extension (PPtl) fits SENSEI RX

    Rinnai
    $ 0.00 - $ 0.00
    $ 0.00
    $ 30.99
    $ 30.99 - $ 30.99
    $ 30.99

    Ubbink Polypropylene concentric venting delivers a professional solution with improved safety and convenience. 2/4 in. (60/100) Ubbink Vent Compone...

    View full details
    $ 0.00 - $ 0.00
    $ 0.00
    $ 30.99
    $ 30.99 - $ 30.99
    $ 30.99
    Sold out

Pro tips: Size from the coldest inlet temperature, verify gas line capacity and vent route before mounting, and plan a neutralized condensate drain. Install isolation valves for easy flushing, set recirc schedules to cut wait time, and place outdoor units per clearance specs. Not sure which RX model or kit fits? Tell us fuel type, venting path, and hot-water demand—we’ll build a dialed-in list.

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