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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 REP199iP High Efficiency Non Condensing Tankless Water Heater with Built-in Recirculation Pump.

    Rinnai
    $ 1,535.10 - $ 1,535.10
    $ 1,535.10
    $ 1,535.10 - $ 1,535.10
    $ 1,535.10

    Rinnai REP199iP Non Condensing Tankless Water Heater The Rinnai REP199iP Non Condensing Tankless Water Heater delivers the perfect blend of high ef...

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    $ 1,535.10 - $ 1,535.10
    $ 1,535.10
    $ 1,535.10 - $ 1,535.10
    $ 1,535.10

  • Rinnai - RE199iP - RE Model Series High Efficiency Non Condensing (Replaces model V94 and RL94)

    Rinnai
    $ 1,423.10 - $ 1,423.10
    $ 1,423.10
    $ 1,423.10 - $ 1,423.10
    $ 1,423.10

    Spec Sheet Install Manual Learn More RE199iP is the perfect combination of high efficiency, comfort and value in a Propane gas non- condensing ta...

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    $ 1,423.10 - $ 1,423.10
    $ 1,423.10
    $ 1,423.10 - $ 1,423.10
    $ 1,423.10

  • Rinnai REP199iN High Efficiency Non Condensing Indoor Tankless Water Heater With Built-in Recirculation Pump

    Rinnai
    $ 1,535.10 - $ 1,535.10
    $ 1,535.10
    $ 1,535.10 - $ 1,535.10
    $ 1,535.10

    Rinnai REP199iN High Efficiency Tankless Water Heater With Recirculation Pump The Rinnai REP199iN High-Efficiency Tankless Water Heater delivers ma...

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    $ 1,535.10 - $ 1,535.10
    $ 1,535.10
    $ 1,535.10 - $ 1,535.10
    $ 1,535.10

  • Rinnai RE199iN Natural Gas High Efficiency Non Condensing Tankless Water Heater

    Rinnai
    $ 1,423.10 - $ 1,423.10
    $ 1,423.10
    $ 1,423.10 - $ 1,423.10
    $ 1,423.10

    Rinnai RE199iN Natural Gas Tankless Water Heater Never run out of hot water again with the Rinnai RE199iN natural gas non-condensing tankless water...

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    $ 1,423.10 - $ 1,423.10
    $ 1,423.10
    $ 1,423.10 - $ 1,423.10
    $ 1,423.10

  • Rinnai RE180iP High Efficiency Non Condensing Indoor Propane Tankless Water Heater

    Rinnai
    $ 1,212.40 - $ 1,212.40
    $ 1,212.40
    $ 1,212.40 - $ 1,212.40
    $ 1,212.40

    Rinnai RE180iP Indoor Propane Tankless Water Heater The Rinnai RE180iP Tankless Water Heater is your high-efficiency, space-saving solution for end...

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    $ 1,212.40 - $ 1,212.40
    $ 1,212.40
    $ 1,212.40 - $ 1,212.40
    $ 1,212.40

  • Rinnai RE180iN Natural Gas High Efficiency Non Condensing Tankless Water Heater

    Rinnai
    $ 1,212.40 - $ 1,212.40
    $ 1,212.40
    $ 1,212.40 - $ 1,212.40
    $ 1,212.40

    Rinnai RE180iN Indoor Non Condensing Tankless Water Heater Enjoy endless hot water and exceptional efficiency with the Rinnai RE180iN natural gas t...

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    $ 1,212.40 - $ 1,212.40
    $ 1,212.40
    $ 1,212.40 - $ 1,212.40
    $ 1,212.40

  • Rinnai - RE160iP - RE Model Series High Efficiency Non Condensing (Replaces model V65)

    Rinnai
    $ 992.60 - $ 992.60
    $ 992.60
    $ 992.60 - $ 992.60
    $ 992.60

    Spec Sheet Install Manual Learn More RE160iP is the perfect combination of high efficiency, comfort and value in a Propane gas non- condensing ta...

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    $ 992.60 - $ 992.60
    $ 992.60
    $ 992.60 - $ 992.60
    $ 992.60

  • Rinnai - RE160iN - RE Model Series High Efficiency Non Condensing (Replaces model V65)

    Rinnai
    $ 992.60 - $ 992.60
    $ 992.60
    $ 992.60 - $ 992.60
    $ 992.60

    Spec Sheet Install Manual Learn More RE160iN is the perfect combination of high efficiency, comfort and value in a natural gas non- condensing ta...

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    $ 992.60 - $ 992.60
    $ 992.60
    $ 992.60 - $ 992.60
    $ 992.60
  • Rinnai - Rinnai 21" Universal Non-Cond Horizontal Termination 223184 - - Water Heater Venting - Big Frog Supply

    Rinnai - 223184 - 21" Universal Non-Cond Horizontal Termination

    Rinnai
    $ 84.00 - $ 84.00
    $ 84.00
    $ 84.00 - $ 84.00
    $ 84.00

    Rinnai's 223184 21" universal non-condensing horizontal termination kit is compatible with all Rinnai tankless water heater models except the 98 se...

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    $ 84.00 - $ 84.00
    $ 84.00
    $ 84.00 - $ 84.00
    $ 84.00
  • Rinnai - Rinnai Horizontal Termination Diverter Kit 21" 223187 - - Water Heater Venting - Big Frog Supply
    Sold out

    Rinnai - 223187 - Horizontal Termination Diverter Kit 21"

    Rinnai
    $ 117.00 - $ 117.00
    $ 117.00
    $ 117.00 - $ 117.00
    $ 117.00

    Raised termination kit for Rinnai tankless water heater venting in the shape of an L to go outside of side wall. Inner exhaust material is aluminum...

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    $ 117.00 - $ 117.00
    $ 117.00
    $ 117.00 - $ 117.00
    $ 117.00
    Sold out
  • Rinnai - Rinnai 18" Roof Discharge Terminal 184118S - - Water Heater Venting - Big Frog Supply

    Rinnai - 184118S - 18" (above roof) Roof Discharge Terminal

    Rinnai
    $ 115.00 - $ 115.00
    $ 115.00
    $ 115.00 - $ 115.00
    $ 115.00

    Rinnai roof discharge 18" for non-condensing ultra series tankless water heaters. SKU: 184118S Color of product may differ from image. This ventin...

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    $ 115.00 - $ 115.00
    $ 115.00
    $ 115.00 - $ 115.00
    $ 115.00
  • Rinnai - Rinnai Universal Horizontal Termination Kit 21" 223182 - - Water Heater Venting - Big Frog Supply

    Rinnai - 223182 - Universal Horizontal Termination Kit 21"

    Rinnai
    $ 114.99 - $ 114.99
    $ 114.99
    $ 114.99 - $ 114.99
    $ 114.99

    Long termination kit for Rinnai tankless water heater venting in the shape of an L to go outside of side wall. Inner exhaust material is aluminum a...

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    $ 114.99 - $ 114.99
    $ 114.99
    $ 114.99 - $ 114.99
    $ 114.99
  • Rinnai - Rinnai Universal Horizontal Termination Kit 11.5" 223181 - - Water Heater Venting - Big Frog Supply - 2
    Rinnai - Rinnai Universal Horizontal Termination Kit 11.5" 223181 - - Water Heater Venting - Big Frog Supply - 1

    Rinnai 223181 Non-Condensing Universal Horizontal Termination Kit 11.5"

    Rinnai
    $ 96.19 - $ 96.19
    $ 96.19
    $ 96.19 - $ 96.19
    $ 96.19

    Rinnai Universal Horizontal Termination Kit The Rinnai 223181 Non-Condensing Horizontal Termination Kit is an 11-1/2” universal venting solution th...

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    $ 96.19 - $ 96.19
    $ 96.19
    $ 96.19 - $ 96.19
    $ 96.19
  • Rinnai - Rinnai All-Weather Wall Discharge 223159 - - Water Heater Venting - Big Frog Supply

    Rinnai - 223159 - All-Weather Wall Discharge

    Rinnai
    $ 79.99 - $ 79.99
    $ 79.99
    $ 79.99 - $ 79.99
    $ 79.99

    Rinnai's all-weather wall discharge 223159. Product color may vary from displayed image.

    $ 79.99 - $ 79.99
    $ 79.99
    $ 79.99 - $ 79.99
    $ 79.99
  • Rinnai - Rinnai Condensate Trap 222053 - - Water Heater Venting - Big Frog Supply
    Sold out

    Rinnai - 222053 - Condensate Trap

    Rinnai
    $ 61.00 - $ 61.00
    $ 61.00
    $ 61.00 - $ 61.00
    $ 61.00

    Rinnai has made the best condensating trap for their line of tankless water heaters. The 222053 condesate trap works with all plastic and metal com...

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    $ 61.00 - $ 61.00
    $ 61.00
    $ 61.00 - $ 61.00
    $ 61.00
    Sold out
  • Rinnai - Rinnai Vertical Discharge Adapter 4" 224064 - - Water Heater Venting - Big Frog Supply

    Rinnai - 224064 - Vertical Discharge Adapter 4"

    Rinnai
    $ 44.00 - $ 44.00
    $ 44.00
    $ 44.00 - $ 44.00
    $ 44.00

    Rinnai's 224064 4 inch vertical discharge adapter is perfect for your tankless water heaters. Actual product's color may vary from shown. This ve...

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    $ 44.00 - $ 44.00
    $ 44.00
    $ 44.00 - $ 44.00
    $ 44.00
  • Rinnai - Rinnai 90 Degree Elbow 224063 - - Water Heater Venting - Big Frog Supply

    Rinnai - 224063 - 90 Degree Elbow

    Rinnai
    $ 63.00 - $ 63.00
    $ 63.00
    $ 63.00 - $ 63.00
    $ 63.00

    This 90 degree elbow is for non-condensing (luxury and value series) Rinnai tankless water heaters. Rinnai 224063. Product color may differ from im...

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    $ 63.00 - $ 63.00
    $ 63.00
    $ 63.00 - $ 63.00
    $ 63.00
  • Rinnai - Rinnai Vent Pipe Extension 39" 224053 - - Water Heater Venting - Big Frog Supply

    Rinnai - 224053 - Vent Pipe Extension 39"

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

    39" vent pipe extension for your Rinnai tankless water heater venting. Inner exhaust material is aluminum and outer intake material is plastic. Pa...

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    $ 78.00 - $ 78.00
    $ 78.00
    $ 78.00 - $ 78.00
    $ 78.00
  • Rinnai - Rinnai Vent Pipe Extension 19.5" 224052 - - Water Heater Venting - Big Frog Supply

    Rinnai - 224052 - Vent Pipe Extension 19.5"

    Rinnai
    $ 71.00 - $ 71.00
    $ 71.00
    $ 71.00 - $ 71.00
    $ 71.00

    19.5" vent pipe extension for your Rinnai tankless water heater venting. Inner exhaust material is aluminum and outer intake material is plastic. ...

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    $ 71.00 - $ 71.00
    $ 71.00
    $ 71.00 - $ 71.00
    $ 71.00
  • Rinnai - Rinnai Vent Pipe Extension 10" 224051 - - Water Heater Venting - Big Frog Supply

    Rinnai - 224051 - Vent Pipe Extension 10"

    Rinnai
    $ 50.00 - $ 50.00
    $ 50.00
    $ 50.00 - $ 50.00
    $ 50.00

    10" vent pipe extension for your Rinnai tankless water heater venting. Inner exhaust material is aluminum and outer intake material is plastic. Pa...

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    $ 50.00 - $ 50.00
    $ 50.00
    $ 50.00 - $ 50.00
    $ 50.00
  • Rinnai - Rinnai 45 Degree Elbows For Venting NON CONDENSING (2 Pack) 224050 - - Water Heater Venting - Big Frog Supply

    Rinnai - 224050 - 45 Degree Elbows For Venting NON CONDENSING (2 Pack)

    Rinnai
    $ 87.00 - $ 87.00
    $ 87.00
    $ 87.00 - $ 87.00
    $ 87.00

    45 degree elbows for your Rinnai tankless water heater venting. Inner exhaust material is aluminum and outer intake material is plastic. Part Numb...

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    $ 87.00 - $ 87.00
    $ 87.00
    $ 87.00 - $ 87.00
    $ 87.00

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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