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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
  • Eemax - 2.5 Gallon Mini Tank - - Mechanical - Big Frog Supply
    Sold out

    Eemax - EMT2.5 - 2.5 Gallon Mini Tank

    Eemax
    $ 0.00 - $ 0.00
    $ 0.00
    $ 181.74
    $ 181.74 - $ 181.74
    $ 181.74

    Spec Sheet Install Manual Choosing the right Tankless Electric Water Heater for your home. Features Point-of-use heating eliminates long hot wat...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 181.74
    $ 181.74 - $ 181.74
    $ 181.74
    Sold out

  • Chronomite - SR-20L/120 - HTR SR Series Instant Low Flow Tankless Water Heater, small

    Chronomite
    $ 208.79 - $ 208.79
    $ 208.79
    $ 208.79 - $ 208.79
    $ 208.79

    Install Manual Choosing the right Tankless Electric Water Heater for your home. Chronomite electric tankless water heaters are the space-saving ...

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    $ 208.79 - $ 208.79
    $ 208.79
    $ 208.79 - $ 208.79
    $ 208.79

  • Chronomite - SR-15L/120 - HTR 120-Volt 15-Amp SR Series Instant-Flow Low Flow Tankless Water Heater

    Chronomite
    $ 208.79 - $ 208.79
    $ 208.79
    $ 208.79 - $ 208.79
    $ 208.79

    Choosing the right Tankless Electric Water Heater for your home. Chronomite electric tankless water heaters are the space-saving solution for p...

    View full details
    $ 208.79 - $ 208.79
    $ 208.79
    $ 208.79 - $ 208.79
    $ 208.79

  • Chronomite - SR-30L/120 - HTR 120-Volt 30-Amp SR Series Instant-Flow Low Flow Tankless Water Heater

    Chronomite
    $ 234.87 - $ 234.87
    $ 234.87
    $ 234.87 - $ 234.87
    $ 234.87

    Install Manual Choosing the right Tankless Electric Water Heater for your home. Chronomite electric tankless water heaters are the space-saving ...

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    $ 234.87 - $ 234.87
    $ 234.87
    $ 234.87 - $ 234.87
    $ 234.87

  • Rheem - RTEX-04 - 3kw Tankless Electric Water Heater

    Rheem
    $ 189.00 - $ 189.00
    $ 189.00
    $ 189.00 - $ 189.00
    $ 189.00

    Spec Sheet Install Manual Choosing the right Tankless Electric Water Heater for your home. Overview Professional Classic® tankless electric wa...

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    $ 189.00 - $ 189.00
    $ 189.00
    $ 189.00 - $ 189.00
    $ 189.00

  • Eemax - SPEX3012 - 3.0 kW 120V Electric Tankless Water Heater

    Eemax
    $ 0.00 - $ 0.00
    $ 0.00
    $ 237.69
    $ 237.69 - $ 237.69
    $ 237.69

    Spec Sheet   Install Manual Choosing the right Tankless Electric Water Heater for your home. FEATURES Lowest activation in industry with 0.2 GP...

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    $ 0.00 - $ 0.00
    $ 0.00
    $ 237.69
    $ 237.69 - $ 237.69
    $ 237.69
  • Sold out

    Eemax - SPEX2412 - 2.4 kW 120V Electric Tankless Water Heater

    Eemax
    $ 0.00 - $ 0.00
    $ 0.00
    $ 255.99
    $ 255.99 - $ 255.99
    $ 255.99

    Spec Sheet   Install Manual Choosing the right Tankless Electric Water Heater for your home. FEATURES Lowest activation in industry with 0.2 GP...

    View full details
    $ 0.00 - $ 0.00
    $ 0.00
    $ 255.99
    $ 255.99 - $ 255.99
    $ 255.99
    Sold out

  • Eemax - SPEX3512 - FLOWCO 3.5 KW 120V ELECTRIC TANKLESS WATER HEATER

    Eemax
    $ 0.00 - $ 0.00
    $ 0.00
    $ 196.00
    $ 196.00 - $ 196.00
    $ 196.00

    Spec Sheet   Install Manual Choosing the right Tankless Electric Water Heater for your home. FEATURES Lowest activation in industry with 0.2 GPM...

    View full details
    $ 0.00 - $ 0.00
    $ 0.00
    $ 196.00
    $ 196.00 - $ 196.00
    $ 196.00

  • Stiebel Eltron - SHC6MINITANK - 235089 SHC 6 Mini-Tank Electric Water Heater, 6 Gallon, 1300W, 120V, 15-1/8" W x 20-1/2" H x 15" D

    Stiebel Eltron
    $ 269.99 - $ 269.99
    $ 269.99
    $ 269.99 - $ 269.99
    $ 269.99

    Spec Sheet Install Manual SHC series mini-tank electric water heater is ideal for office buildings, stores, malls, warehouses, food trucks, resta...

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    $ 269.99 - $ 269.99
    $ 269.99
    $ 269.99 - $ 269.99
    $ 269.99
  • Sold out

    Stiebel Eltron - SHC2.5MINITANK - 233219 2.5 gallon, 1300W, 120V SHC 2.5 Mini-Tank Electric Water Heater

    Stiebel Eltron
    $ 189.00 - $ 189.00
    $ 189.00
    $ 189.00 - $ 189.00
    $ 189.00

    Spec Sheet Install Manual Stiebel Eltron 233219 Details If you're storing 30+ gallons of hot water in a traditional water heater when your appli...

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    $ 189.00 - $ 189.00
    $ 189.00
    $ 189.00 - $ 189.00
    $ 189.00
    Sold out
  • Sold out

    Stiebel Eltron - SHC4MINITANK - 234046 SHC 4 Mini-Tank Electric Water Heater, 4 Gallon, 1300W, 120V, 12-5/8" W x 19-3/4 12-1/2" D

    Stiebel Eltron
    $ 239.00 - $ 239.00
    $ 239.00
    $ 239.00 - $ 239.00
    $ 239.00

    Spec Sheet Install Manual Stiebel Eltron 23406 Details If you're storing 30+ gallons of hot water in a traditional water heater when your applic...

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    $ 239.00 - $ 239.00
    $ 239.00
    $ 239.00 - $ 239.00
    $ 239.00
    Sold out

  • Rheem - RTGH-84XLP-2 - 8.4 GPM Outdoor Condensing Propane Tankless Water Heater

    Rheem
    $ 1,188.00 - $ 1,188.00
    $ 1,188.00
    $ 1,188.00 - $ 1,188.00
    $ 1,188.00

    Spec Sheet Max GPM 8.4 Recirc Incl. No Warranty 12 Yrs Rheem Prestige® RTGH is a series of high efficiency condensing tankless gas wate...

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    $ 1,188.00 - $ 1,188.00
    $ 1,188.00
    $ 1,188.00 - $ 1,188.00
    $ 1,188.00
  • 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

  • Stiebel Eltron - MINI2-1 - 231045 Mini 2 Point of Use Tankless Electric Water Heater, 1.8 kW, 120V, 7-1/2" W x 6-1/2" H x 3-1/4" D

    Stiebel Eltron
    $ 195.00 - $ 195.00
    $ 195.00
    $ 195.00 - $ 195.00
    $ 195.00

    Spec Sheet Install Manual Choosing the right Tankless Electric Water Heater for your home. Stiebel Eltron 231045 Details An excellent addition to ...

    View full details
    $ 195.00 - $ 195.00
    $ 195.00
    $ 195.00 - $ 195.00
    $ 195.00

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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