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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.


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

    Rinnai
    Original price $ 0.00 - Original price $ 0.00
    Original price $ 0.00
    $ 1,532.79
    $ 1,532.79 - $ 1,532.79
    Current price $ 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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    Original price $ 0.00 - Original price $ 0.00
    Original price $ 0.00
    $ 1,532.79
    $ 1,532.79 - $ 1,532.79
    Current price $ 1,532.79
  • Rinnai RX160iN Sensei RX Series Indoor/Outdoor Natural Gas/Propane Tankless Water Heater

    Rinnai
    Original price $ 0.00 - Original price $ 0.00
    Original price $ 0.00
    $ 1,298.43
    $ 1,298.43 - $ 1,298.43
    Current price $ 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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    Original price $ 0.00 - Original price $ 0.00
    Original price $ 0.00
    $ 1,298.43
    $ 1,298.43 - $ 1,298.43
    Current price $ 1,298.43
  • Rinnai RXP160IN Sensei RX Condensing Recirculating Pro Series Indoor with Pump Natural Gas/Propane

    Rinnai
    Original price $ 0.00 - Original price $ 0.00
    Original price $ 0.00
    $ 1,517.04
    $ 1,517.04 - $ 1,517.04
    Current price $ 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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    Original price $ 0.00 - Original price $ 0.00
    Original price $ 0.00
    $ 1,517.04
    $ 1,517.04 - $ 1,517.04
    Current price $ 1,517.04
  • Rinnai RX180iN Sensei Indoor/Outdoor Tankless Water Heater Natural Gas/Propane

    Rinnai
    Original price $ 0.00 - Original price $ 0.00
    Original price $ 0.00
    $ 1,409.94
    $ 1,409.94 - $ 1,409.94
    Current price $ 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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    Original price $ 0.00 - Original price $ 0.00
    Original price $ 0.00
    $ 1,409.94
    $ 1,409.94 - $ 1,409.94
    Current price $ 1,409.94
  • Rinnai -RX130iN- Sensei RX Condensing Series Pro Build Indoor without Pump Natural Gas/Propane

    Rinnai
    Original price $ 0.00 - Original price $ 0.00
    Original price $ 0.00
    $ 1,137.78
    $ 1,137.78 - $ 1,137.78
    Current price $ 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...

    View full details
    Original price $ 0.00 - Original price $ 0.00
    Original price $ 0.00
    $ 1,137.78
    $ 1,137.78 - $ 1,137.78
    Current price $ 1,137.78

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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