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Tankless Water Heaters

Tankless water heaters deliver endless hot water with compact, energy-smart designs. Shop gas (natural gas or LP) and electric models from Rinnai, Rheem, Stiebel Eltron, Eemax, and Chronomite—plus venting, recirculation, controls, and repair parts to finish the job.

Shop by need

  • Fuel & power: Natural Gas and Propane; Electric 120V or 240V point-of-use and whole-home
  • Model type: Condensing and Non-condensing; Indoor or Outdoor; Combination units
  • Recirculation: built-in recirc pump models, add-on pumps, pump hardware, controllers, and WiFi control accessories
  • Venting: concentric and twin-pipe kits, terminations, pipe covers, and heater guards
  • Kits & parts: NG/LP conversion kits, descaler/flush kits, repair parts, cables, and accessories
  • Series callouts: Rinnai Sensei CX and Sensei RX series options
  • Sold out

    Eccotemp - 2SVSRPKE04 - 4" Stainless Steel Vertical Vent Kit

    Eccotemp
    $ 370.00 - $ 370.00
    $ 370.00
    $ 370.00 - $ 370.00
    $ 370.00

    This is for vertical installation of the Eccotemp 45HI and EL22i (indoor models). You will need to purchase additional Z-Vent straight pipe. You wi...

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    $ 370.00 - $ 370.00
    $ 370.00
    $ 370.00 - $ 370.00
    $ 370.00
    Sold out
  • Sold out

    Eccotemp - EZL32OZ - System Descaler Solution 32oz.

    Eccotemp
    $ 41.00 - $ 41.00
    $ 41.00
    $ 41.00 - $ 41.00
    $ 41.00

    Install Manual The Eccotemp System Descaler is made to quickly dissolves water scale, lime, rust, and other water formed deposits, restoring effici...

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    $ 41.00 - $ 41.00
    $ 41.00
    $ 41.00 - $ 41.00
    $ 41.00
    Sold out
  • Sold out

    Eccotemp - EZL1GAL - System Descaler Solution 1 Gal.

    Eccotemp
    $ 72.00 - $ 72.00
    $ 72.00
    $ 72.00 - $ 72.00
    $ 72.00

    Install Manual The Eccotemp System Descaler is made to quickly dissolves water scale, lime, rust, and other water formed deposits, restoring effici...

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    $ 72.00 - $ 72.00
    $ 72.00
    $ 72.00 - $ 72.00
    $ 72.00
    Sold out
  • Sold out

    Eccotemp - i12-NG - Indoor 4.0 GPM Natural Gas Tankless Water Heater

    Eccotemp
    $ 399.00 - $ 399.00
    $ 399.00
    $ 399.00 - $ 399.00
    $ 399.00

    Description The Eccotemp i12 Natural Gas 4 Gallon Per Minute (GPM) Tankless Water Heater has a new revolutionary design, making it unlike any other...

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    $ 399.00 - $ 399.00
    $ 399.00
    $ 399.00 - $ 399.00
    $ 399.00
    Sold out
  • Sold out

    Eccotemp - 45H-NG - Outdoor 6.8 GPM Natural Gas Tankless Water Heater

    Eccotemp
    $ 906.00 - $ 906.00
    $ 906.00
    $ 906.00 - $ 906.00
    $ 906.00

    Install Manual This model has been redesigned to activate at a lower flow rate of 0.8 GPM as well as updated self diagnostics.The Eccotemp 45H-NG...

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    $ 906.00 - $ 906.00
    $ 906.00
    $ 906.00 - $ 906.00
    $ 906.00
    Sold out
  • Sold out

    Eccotemp - 45HI-NG - Indoor 6.8 GPM Natural Gas Tankless Water Heater

    Eccotemp
    $ 906.00 - $ 906.00
    $ 906.00
    $ 906.00 - $ 906.00
    $ 906.00

    This model has been redesigned to activate at a lower flow rate of 0.8 GPM as well as updated self diagnostics.The Eccotemp 45HI-NG Indoor Natural ...

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    $ 906.00 - $ 906.00
    $ 906.00
    $ 906.00 - $ 906.00
    $ 906.00
    Sold out
  • Sold out

    Eccotemp - EM-7.0 - Electric Mini Storage Tank Water Heater

    Eccotemp
    $ 298.00 - $ 298.00
    $ 298.00
    $ 298.00 - $ 298.00
    $ 298.00

    The Eccotemp EM-7.0 is a point of use Mini-Tank Water Heater with a tank capacity of 7 gallons and is designed to supply on-demand hot water to any...

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    $ 298.00 - $ 298.00
    $ 298.00
    $ 298.00 - $ 298.00
    $ 298.00
    Sold out
  • Sold out

    Eccotemp - EM-4.0 - Electric Mini Storage Tank Water Heater

    Eccotemp
    $ 278.00 - $ 278.00
    $ 278.00
    $ 278.00 - $ 278.00
    $ 278.00

    The Eccotemp EM-4.0 is a point of use Mini-Tank Water Heater with a tank capacity of 4 gallons and is designed to supply on-demand hot water to an...

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    $ 278.00 - $ 278.00
    $ 278.00
    $ 278.00 - $ 278.00
    $ 278.00
    Sold out
  • Sold out

    Eccotemp - 2ZVEWD03 - 3" Horizontal Vent Kit

    Eccotemp
    $ 391.00 - $ 391.00
    $ 391.00
    $ 391.00 - $ 391.00
    $ 391.00

    This 3" single walled Horizontal Stainless Steel Z-Vent Wall Hung Water Heater Vent Kit is supplied with all the necessary components for a quick a...

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    $ 391.00 - $ 391.00
    $ 391.00
    $ 391.00 - $ 391.00
    $ 391.00
    Sold out
  • Sold out

    Eccotemp - 2ZVWB04 - 4" Horizontal Vent Kit

    Eccotemp
    $ 401.00 - $ 401.00
    $ 401.00
    $ 401.00 - $ 401.00
    $ 401.00

    4" Horizontal Stainless Steel Z-Vent Wall Hung Water Heater Vent Kit with Backflow Preventer Kit Includes: (1) Termination Hood (1) 4" x 90-Degree...

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    $ 401.00 - $ 401.00
    $ 401.00
    $ 401.00 - $ 401.00
    $ 401.00
    Sold out
  • Sold out

    Eccotemp - EL7 - Luxé 1.85 GPM 52K BTU Outdoor Portable Tankless Water Heater with LED Display

    Eccotemp
    $ 298.00 - $ 298.00
    $ 298.00
    $ 298.00 - $ 298.00
    $ 298.00

    Eccotemp’s Portable Tankless Water Heaters are the number “1” sold and trusted CSA approved portable tankless water heaters in the world. The Eccot...

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    $ 298.00 - $ 298.00
    $ 298.00
    $ 298.00 - $ 298.00
    $ 298.00
    Sold out

  • Eccotemp - ESH-4.0 - SmartHome 4.0 Gallon Mini Tank Water Heater with Voice Commands

    Eccotemp
    $ 329.00 - $ 329.00
    $ 329.00
    $ 329.00 - $ 329.00
    $ 329.00

    The Eccotemp ESH-4.0 SMARTHOME Mini Tank Water Heater is the most advanced mini water heater on the market. With our Patent Pending SMARTHOME techn...

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    $ 329.00 - $ 329.00
    $ 329.00
    $ 329.00 - $ 329.00
    $ 329.00
  • Sold out

    Eccotemp - EL10 - Luxé 3.0 GPM Portable Outdoor Tankless Water Heater

    Eccotemp
    $ 411.00 - $ 411.00
    $ 411.00
    $ 411.00 - $ 411.00
    $ 411.00

    The Eccotemp 3.0 GPM Luxé Portable Tankless Water Heater (EL10) is one of the highest rated GPM Portable Water Heaters in the World thanks to its d...

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    $ 411.00 - $ 411.00
    $ 411.00
    $ 411.00 - $ 411.00
    $ 411.00
    Sold out
  • Sold out

    Eccotemp - ESH-2.5 - SmartHome 2.5 Gallon Mini Tank Water Heater with Voice Commands

    Eccotemp
    $ 288.00 - $ 288.00
    $ 288.00
    $ 288.00 - $ 288.00
    $ 288.00

    The Eccotemp ESH-2.5 SMARTHOME Mini Tank Water Heater is the most advanced mini water heater on the market. With our patent pending SMARTHOME techn...

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    $ 288.00 - $ 288.00
    $ 288.00
    $ 288.00 - $ 288.00
    $ 288.00
    Sold out
  • Sold out

    Eccotemp - 6GB-ILP - Builder Series 6.0 GPM Indoor Liquid Propane Tankless Water Heater

    Eccotemp
    $ 782.00 - $ 782.00
    $ 782.00
    $ 782.00 - $ 782.00
    $ 782.00

    The Eccotemp Builder Series 6 GPM Indoor Liquid Propane Tankless Water Heater (6GB-ILP) is CSA approved and rated at an impressive 6 GPM with a tem...

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    $ 782.00 - $ 782.00
    $ 782.00
    $ 782.00 - $ 782.00
    $ 782.00
    Sold out
  • Sold out

    Eccotemp - 6.5GB-ILP - Builder Series 6.5 GPM Indoor Liquid Propane Tankless Water Heater

    Eccotemp
    $ 844.00 - $ 844.00
    $ 844.00
    $ 844.00 - $ 844.00
    $ 844.00

    The Eccotemp 6.5 GPM Indoor Liquid Propane Tankless Water Heater (6.5GB-ILP) is the second largest capacity model in the Builder Series. CSA approv...

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    $ 844.00 - $ 844.00
    $ 844.00
    $ 844.00 - $ 844.00
    $ 844.00
    Sold out
  • Sold out

    Eccotemp - 7GB-LP - Builder Series 7.0 GPM Outdoor Liquid Propane Tankless Water Heater

    Eccotemp
    $ 926.00 - $ 926.00
    $ 926.00
    $ 926.00 - $ 926.00
    $ 926.00

    The Eccotemp 7.0 GPM Outdoor Liquid Propane Tankless Water Heater (7GB-LP) is the largest capacity model in the Builder Series. ETL approved and ra...

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    $ 926.00 - $ 926.00
    $ 926.00
    $ 926.00 - $ 926.00
    $ 926.00
    Sold out
  • Sold out

    Eccotemp - 7GB-NG - Builder Series 7.0 GPM Outdoor Natural Gas Tankless Water Heater

    Eccotemp
    $ 926.00 - $ 926.00
    $ 926.00
    $ 926.00 - $ 926.00
    $ 926.00

    The Eccotemp 7.0 GPM Outdoor Natural Gas Tankless Water Heater (7GB-NG) is the largest capacity model in the Builder Series. ETL approved and rated...

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    $ 926.00 - $ 926.00
    $ 926.00
    $ 926.00 - $ 926.00
    $ 926.00
    Sold out

Quick choosing guide

  1. Size by flow: estimate peak demand in GPM at your winter inlet temperature rise. Whole-home gas units often cover 5–11+ GPM; electric point-of-use fits sinks and small loads.
  2. Pick fuel & placement: Gas for highest flow; choose indoor with proper venting or outdoor where climate allows. Electric units need the correct amperage and breakers.
  3. Efficiency: select condensing for higher efficiency and cooler exhaust; plan condensate drain where required.
  4. Faster hot water: choose a model with a built-in recirc pump or add a recirc kit and controller.
  5. Complete the install: vent kit and terminations for gas models; isolation/service valves; pipe covers; WiFi or wall controllers. Use NG/LP conversion kits only as specified.
  6. Maintenance: add a descaler/flush kit and schedule periodic cleaning to protect the heat exchanger.

Pro tips: Size for the coldest inlet temperature, verify gas line BTU capacity and vent route for NG/LP models, or breaker/wire size for electric units. Install isolation valves for easy flushing, set recirc schedules to cut wait time, and winterize outdoor units where required.

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