Skip to content
Enjoy fast and free shipping on all orders over $89! Contact us (855) 424-4376
Enjoy fast and free shipping on all orders over $89! Contact us (855) 424-4376

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
  •

    Stiebel Eltron DHC-E 8/10-2 Trend Heater 240/208 V 9.6/7.2 kW stg 2 7.2/5.4 kW stg 1

    Stiebel Eltron
    $ 0.00 - $ 0.00
    $ 0.00
    $ 361.00
    $ 361.00 - $ 361.00
    $ 361.00

    Stiebel Eltron DHC-E 8/10-2 Trend Tankless Electric Water Heater Brand: Stiebel Eltron SKU: DHC-E 8/10-2 Trend Product Overview The Stiebel El...

    View full details
    $ 0.00 - $ 0.00
    $ 0.00
    $ 361.00
    $ 361.00 - $ 361.00
    $ 361.00
  • Sold out

    Stiebel Eltron Mini-E 2-1 Point of Use Tankless Electric Water Heater w/ Thermostat 1.8KW 120V

    Stiebel Eltron
    $ 0.00 - $ 0.00
    $ 0.00
    $ 205.00
    $ 205.00 - $ 205.00
    $ 205.00

    Stiebel Eltron Mini-E 2-1 Point-of-Use Tankless Water Heater  Brand: Stiebel Eltron SKU: Mini-E 2-1 Product Overview The Stiebel Eltron Mini-...

    View full details
    $ 0.00 - $ 0.00
    $ 0.00
    $ 205.00
    $ 205.00 - $ 205.00
    $ 205.00
    Sold out
  • Sold out

    Stiebel Eltron 239215 240/208 V 19.2/14.4 kW

    Stiebel Eltron
    $ 0.00 - $ 0.00
    $ 0.00
    $ 784.00
    $ 784.00 - $ 784.00
    $ 784.00

    Stiebel Eltron Tempra 20 Trend Tankless Water Heater 239215  Brand: Stiebel Eltron SKU: Tempra 20 Trend Product Overview The Stiebel Eltron T...

    View full details
    $ 0.00 - $ 0.00
    $ 0.00
    $ 784.00
    $ 784.00 - $ 784.00
    $ 784.00
    Sold out
  • Eemax water heater on a white background

    Eemax SPEX95T LavAdvantage Tankless Water Heater 9.5kW 240V

    Eemax
    $ 0.00 - $ 0.00
    $ 0.00
    $ 343.28
    $ 343.28 - $ 343.28
    $ 343.28

    Eemax SPEX95T LavAdvantage Tankless Water Heater 9.5kW 240V Brand: Eemax | SKU: SPEX95T Product Overview The Eemax SPEX95T LavAdvantage is a 9....

    View full details
    $ 0.00 - $ 0.00
    $ 0.00
    $ 343.28
    $ 343.28 - $ 343.28
    $ 343.28
  • A white Eemax wall-mounted water heater or boiler unit with brass connection fittings at the bottom, shown against a light gray background.
    Sold out

    Eemax SPEX3512T LavAdvantage Tankless Water Heater 3.5kW 120V

    Eemax
    $ 0.00 - $ 0.00
    $ 0.00
    $ 343.28
    $ 343.28 - $ 343.28
    $ 343.28

    Eemax SPEX3512T LavAdvantage Tankless Water Heater 3.5kW 120V Brand: Eemax | SKU: SPEX3512T Product Overview The Eemax SPEX3512T LavAdvantage i...

    View full details
    $ 0.00 - $ 0.00
    $ 0.00
    $ 343.28
    $ 343.28 - $ 343.28
    $ 343.28
    Sold out
  • A white Eemax wall-mounted water heater shown from the back, featuring a circular logo badge and two gold-colored connection fittings at the bottom, set against a plain white background.

    Eemax SPEX65T LavAdvantage Tankless Water Heater 6.5kW 240V

    Eemax
    $ 0.00 - $ 0.00
    $ 0.00
    $ 343.28
    $ 343.28 - $ 343.28
    $ 343.28

    Eemax SPEX65T LavAdvantage Tankless Water Heater 6.5kW 240V Brand: Eemax | SKU: SPEX65T Product Overview The Eemax SPEX65T LavAdvantage is a 6....

    View full details
    $ 0.00 - $ 0.00
    $ 0.00
    $ 343.28
    $ 343.28 - $ 343.28
    $ 343.28
  • An Eemax water heater with a brushed stainless steel front panel, featuring a circular Eemax logo on the upper left and a vertical black control panel with a digital display and rotary dial on the upper right.
    Sold out

    Eemax HA036240 HomeAdvantage II Tankless Water Heater 36kW 240V

    Eemax
    $ 0.00 - $ 0.00
    $ 0.00
    $ 824.21
    $ 824.21 - $ 824.21
    $ 824.21

    Eemax HA036240 HomeAdvantage II Tankless Water Heater 36kW 240V Brand: Eemax | SKU: HA036240 Product Overview The Eemax HA036240 HomeAdvantage ...

    View full details
    $ 0.00 - $ 0.00
    $ 0.00
    $ 824.21
    $ 824.21 - $ 824.21
    $ 824.21
    Sold out
  • White electronic device with 'Eemax' branding on a white background
    Sold out

    Eemax SPEX65 FlowCo Tankless Water Heater 6.5kW 240V

    Eemax
    $ 0.00 - $ 0.00
    $ 0.00
    $ 264.55
    $ 264.55 - $ 264.55
    $ 264.55

    Eemax SPEX65 FlowCo Tankless Water Heater 6.5kW 240V Brand: Eemax | SKU: SPEX65 Product Overview The Eemax SPEX65 FlowCo is a 6.5kW, 240V elect...

    View full details
    $ 0.00 - $ 0.00
    $ 0.00
    $ 264.55
    $ 264.55 - $ 264.55
    $ 264.55
    Sold out
  • A white Ecmax water heater tank with brass connection fittings on the bottom corners and a silver specification label on the top surface, shown on a plain white background.

    Eemax EX190T2 Series Two Tankless Water Heater 19kW 240V

    Eemax
    $ 0.00 - $ 0.00
    $ 0.00
    $ 637.69
    $ 637.69 - $ 637.69
    $ 637.69

    Eemax EX190T2 Series Two Tankless Water Heater 19kW 240V Brand: Eemax | SKU: EX190T2 Product Overview The Eemax EX190T2 Series Two is a 19kW, 2...

    View full details
    $ 0.00 - $ 0.00
    $ 0.00
    $ 637.69
    $ 637.69 - $ 637.69
    $ 637.69
  • White electronic device with 'Eemax' branding on a white background
    Sold out

    Eemax SPEX8208T LavAdvantage Tankless Water Heater 8.3kW 208V

    Eemax
    $ 0.00 - $ 0.00
    $ 0.00
    $ 346.58
    $ 346.58 - $ 346.58
    $ 346.58

    Eemax SPEX8208T LavAdvantage Tankless Water Heater 8.3kW 208V Brand: Eemax | SKU: SPEX8208T Product Overview The Eemax SPEX8208T LavAdvantage i...

    View full details
    $ 0.00 - $ 0.00
    $ 0.00
    $ 346.58
    $ 346.58 - $ 346.58
    $ 346.58
    Sold out
  • A compact wall-mounted electric water heater by Eumoax, featuring a gray front panel with a digital display, a white rotary dial, and a blue side connector, shown on a plain white background.

    Eemax HA008240 HomeAdvantage II Tankless Water Heater 8kW 240V

    Eemax
    $ 0.00 - $ 0.00
    $ 0.00
    $ 221.30
    $ 221.30 - $ 221.30
    $ 221.30

    Eemax HA008240 HomeAdvantage II Tankless Water Heater 8kW 240V Brand: Eemax | SKU: HA008240 Product Overview The Eemax HA008240 HomeAdvantage I...

    View full details
    $ 0.00 - $ 0.00
    $ 0.00
    $ 221.30
    $ 221.30 - $ 221.30
    $ 221.30
  • Eemax wall-mounted electric water heater with a brushed stainless steel front panel, black control display, blue LED digits, and a round silver button, shown against a light gray background.

    Eemax HA013240 HomeAdvantage II Tankless Water Heater 13kW 240V

    Eemax
    $ 0.00 - $ 0.00
    $ 0.00
    $ 365.27
    $ 365.27 - $ 365.27
    $ 365.27

    Eemax HA013240 HomeAdvantage II Tankless Water Heater 13kW 240V Brand: Eemax | SKU: HA013240 Product Overview The Eemax HA013240 HomeAdvantage ...

    View full details
    $ 0.00 - $ 0.00
    $ 0.00
    $ 365.27
    $ 365.27 - $ 365.27
    $ 365.27

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.

Related Articles

Choosing the Right Rheem R-TEX Electric Tankless Water Heater

When it comes to choosing a water heater, there are a lot of options available in the market. However, one...

How Tankless Water Heaters Work

A tankless Rinnai water heater works by heating water on demand as it flows through the unit, rather than storing...

Properly Sizing a Tankless Water Heater

Tankless hot water heaters are an excellent choice for homeowners who want to save money on their energy bills while...

Choosing the right Tankless Electric Water Heater for your home.

In deciding on a Tankless Electric Water Heater there are three main factors. First is determining what application/install you are...

Why Every Home Needs a Wireless Controller for their Tankless Water Heater

Imagine having full control over your water heating system. Now, think about being able to monitor your tankless water heater...

5 Powerful Benefits of Upgrading to a Rinnai Tankless Water Heater

If your water heater’s age is kicking into the double digits, it’s time to consider replacing it. Rusty water and...

Why Should I Upgrade to a Recirculating Water Heater?

Are you tired of waiting for hot water to reach your faucet or shower? Do you find yourself running gallons...

Preventing Scale Build up in your Tankless Hot Water Heater

Scale build-up occurs when minerals and other impurities in the water accumulate on the heating element surfaces, impeding heat transfer...

Rinnai Error Codes and Troubleshooting Tips

Rinnai is a popular brand of tankless water heaters that provides efficient and reliable heating solutions for homes and businesses....

How to fix the Rinnai Error Code LC or 00 Scale Build-Up Problem?

Rinnai Error Code LC Scale Build-Up can cause your water heater to malfunction. Read on to learn how to fix...

How to Properly Install Rinnai Concentric Vent Kits: A Step-by-Step Guide

Learn how to properly install Rinnai concentric vent kits to ensure safe and efficient operation of your tankless water heater....

Top Reasons to Install a Rinnai RWM101 Control-R WiFi

Have you ever considered improving your water heater experience? The Rinnai RWM101 Control-R WiFi is a tankless water heater integrated...

Rinnai Introduces Their Pro Build Sensi RX Series

Rinnai Introduces their Pro Build RX Series Tankless Water Heaters, featuring Adaptive Gas Valve Technology that allows for seamless switching...

How to set up your Rinnai Central Wifi App

Smart Connect Allows you to connect your smart phone or tablet to the SENSEI® RX Series via Bluetooth®. Use the...

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare