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Whole Home Tankless Water Heaters

Whole-home tankless water heaters deliver endless hot water with compact, energy-smart designs. Shop natural gas/propane and high-output electric models, in indoor or outdoor versions, with options for built-in recirculation, Wi-Fi/app control, and clean concentric or twin-pipe venting. Finish installs with vent kits, isolation/flush valves, filters, and maintenance parts.

Shop by need

  • Fuel & power: Natural Gas (NG), Propane (LP), or 240V electric
  • Location: Indoor (vented) or Outdoor (climate/permitted)
  • Type: Condensing (highest efficiency) or Non-condensing
  • Recirculation: built-in pump models, recirc-ready units, or add-on kits
  • Venting: concentric or 2-pipe (PVC/CPVC/PP as specified) with terminations and pipe covers
  • Kits & parts: isolation/flush valves, condensate neutralizers, controllers/Wi-Fi modules, filters, and service parts

Quick choosing guide

  1. Size by demand: total your peak fixtures and calculate required GPM at your winter temperature rise. Whole-home gas units typically cover multi-bath demand; electric whole-home requires adequate amperage and is climate-dependent.
  2. Pick fuel & service: verify gas meter/line capacity and regulator for NG/LP models, or panel amperage/breaker space for electric.
  3. Choose location: Indoor where you can vent; Outdoor where climate/clearances allow and venting is impractical.
  4. Efficiency & condensate: condensing units save energy—plan a drain and consider a condensate neutralizer.
  5. Faster hot water: select a built-in recirc model or add a recirc kit/crossover; set schedules to cut wait time.
  6. Complete the kit: vent kit/terminations, isolation/flush valves, controller or Wi-Fi, and inlet water filtration/scale control as needed.
  7. Maintenance: flush/descale periodically (more often with hard water) to protect the heat exchanger.


  • Sold out

    Rinnai V75iN Natural Gas Tankless Water Heater, 7.5 Gallons Per Minute , While supplies last (Replaced by RE180)

    Rinnai
    $ 1,066.99 - $ 1,066.99
    $ 1,066.99
    $ 1,066.99 - $ 1,066.99
    $ 1,066.99

    Spec Sheet  Install Manual Current RL and 4 of the V models will be discontinued and replaced with the New RE•SERIES™ Non-Condensing models includ...

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    $ 1,066.99 - $ 1,066.99
    $ 1,066.99
    $ 1,066.99 - $ 1,066.99
    $ 1,066.99
    Sold out

  • Rinnai SENSEI RSC160iN RSC Series Super High Efficiency Plus - Natural Gas Water Heater

    Rinnai
    $ 1,369.62 - $ 1,369.62
    $ 1,369.62
    $ 1,369.62 - $ 1,369.62
    $ 1,369.62

    Rinnai SENSEI RSC160iN Super High Efficiency Natural Gas Water Heater Experience the ultimate in hot water performance with the Rinnai RSC160iN Sup...

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    $ 1,369.62 - $ 1,369.62
    $ 1,369.62
    $ 1,369.62 - $ 1,369.62
    $ 1,369.62
  • Sold out

    Rheem - RTG-95DVLN-3 - Mid Efficiency 9.5 GPM Indoor Natural Gas EcoNet Included Tankless Water Heater

    Rheem
    $ 1,543.00 - $ 1,543.00
    $ 1,543.00
    $ 1,543.00 - $ 1,543.00
    $ 1,543.00

    Spec Sheet Mid Efficiency 9.5 GPM Indoor Natural Gas EcoNet Included Tankless Water Heater with 12 Year Limited Warranty Rheem RTG is a series of...

    View full details
    $ 1,543.00 - $ 1,543.00
    $ 1,543.00
    $ 1,543.00 - $ 1,543.00
    $ 1,543.00
    Sold out
  • Sold out

    Rheem - RTG-70DVLN-3 - Mid Efficiency 70 Direct Vent Indoor Natural Gas EcoNet Enabled Tankless Water Heater

    Rheem
    $ 804.00 - $ 804.00
    $ 804.00
    $ 804.00 - $ 804.00
    $ 804.00

    Spec Sheet Mid Efficiency 70 Direct Vent Indoor Natural Gas EcoNet Enabled Tankless Water Heater with 12 Year Limited Warranty   Rheem RTG is a s...

    View full details
    $ 804.00 - $ 804.00
    $ 804.00
    $ 804.00 - $ 804.00
    $ 804.00
    Sold out
  • Sold out

    Rheem - RTG-84DVLP-3 - Mid Efficiency RTG-84DVLP-1 Direct Vent Indoor Propane Tankless Water Heater

    Rheem
    $ 953.00 - $ 953.00
    $ 953.00
    $ 953.00 - $ 953.00
    $ 953.00

    Spec Sheet Mid Efficiency 8.4 GPM Indoor Propane Gas EcoNet Included Tankless Water Heater with 12 Year Limited Warranty   Rheem RTG is a series ...

    View full details
    $ 953.00 - $ 953.00
    $ 953.00
    $ 953.00 - $ 953.00
    $ 953.00
    Sold out

  • Rinnai RE140iP Propane Indoor High Efficiency Non Condensing Tankless Water Heater

    Rinnai
    $ 884.10 - $ 884.10
    $ 884.10
    $ 884.10 - $ 884.10
    $ 884.10

    Rinnai RE140iP Indoor Tankless Water Heater The Rinnai RE140iP  High Efficiency Tankless Water Heater is the ideal indoor solution for homeowners s...

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    $ 884.10 - $ 884.10
    $ 884.10
    $ 884.10 - $ 884.10
    $ 884.10

  • 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...

    View full details
    $ 1,423.10 - $ 1,423.10
    $ 1,423.10
    $ 1,423.10 - $ 1,423.10
    $ 1,423.10

  • Rheem - RTG-84DVLN-3 - Mid Efficiency 8.4 GPM Indoor Natural Gas EcoNet Enabled Tankless Water Heater

    Rheem
    $ 953.00 - $ 953.00
    $ 953.00
    $ 953.00 - $ 953.00
    $ 953.00

    Spec Sheet Mid Efficiency 8.4 GPM Indoor Natural Gas EcoNet Included Tankless Water Heater with 12 Year Limited Warranty   Rheem RTG is a series ...

    View full details
    $ 953.00 - $ 953.00
    $ 953.00
    $ 953.00 - $ 953.00
    $ 953.00

  • 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...

    View full details
    $ 1,535.10 - $ 1,535.10
    $ 1,535.10
    $ 1,535.10 - $ 1,535.10
    $ 1,535.10

  • 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...

    View full details
    $ 1,212.40 - $ 1,212.40
    $ 1,212.40
    $ 1,212.40 - $ 1,212.40
    $ 1,212.40

  • Rinnai - REP160iP - REP Model Series High Efficiency Non Condensing includes a built-in recirculation pump.

    Rinnai
    $ 1,129.10 - $ 1,129.10
    $ 1,129.10
    $ 1,129.10 - $ 1,129.10
    $ 1,129.10

    Spec Sheet Install Manual Learn More REP160iP is the perfect combination of high efficiency, comfort and value in a propane gas tankless water heat...

    View full details
    $ 1,129.10 - $ 1,129.10
    $ 1,129.10
    $ 1,129.10 - $ 1,129.10
    $ 1,129.10

  • 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...

    View full details
    $ 992.60 - $ 992.60
    $ 992.60
    $ 992.60 - $ 992.60
    $ 992.60

  • Rinnai - REP160iN - REP Model Series High Efficiency Non Condensing includes a built-in recirculation pump.

    Rinnai
    $ 1,129.10 - $ 1,129.10
    $ 1,129.10
    $ 1,129.10 - $ 1,129.10
    $ 1,129.10

    Spec Sheet Install Manual Learn More REP160iN is the perfect combination of high efficiency, comfort and value in a natural gas non- condensing tan...

    View full details
    $ 1,129.10 - $ 1,129.10
    $ 1,129.10
    $ 1,129.10 - $ 1,129.10
    $ 1,129.10

  • 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...

    View full details
    $ 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...

    View full details
    $ 1,212.40 - $ 1,212.40
    $ 1,212.40
    $ 1,212.40 - $ 1,212.40
    $ 1,212.40

  • 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...

    View full details
    $ 992.60 - $ 992.60
    $ 992.60
    $ 992.60 - $ 992.60
    $ 992.60

  • Rinnai - RE140iN - RE Model Series High Efficiency Non Condensing

    Rinnai
    $ 884.10 - $ 884.10
    $ 884.10
    $ 884.10 - $ 884.10
    $ 884.10

    Spec Sheet  Install Manual Learn More RE140iN is the perfect combination of high efficiency, comfort and value in a natural gas non- condensing tan...

    View full details
    $ 884.10 - $ 884.10
    $ 884.10
    $ 884.10 - $ 884.10
    $ 884.10

  • 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...

    View full details
    $ 1,535.10 - $ 1,535.10
    $ 1,535.10
    $ 1,535.10 - $ 1,535.10
    $ 1,535.10

Pro tips: Size from the coldest inlet temperature, verify gas line and meter capacity (or electrical service for electric units), and map the vent path before mounting. Neutralize condensate on condensing models, install isolation valves for easy flushing, and follow local code for gas/electrical and combustion air. Not sure which unit or kit fits? Tell us fuel type, location, and demand—we’ll build a dialed-in list.

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