Tankless Water Heaters

Tankless water heaters provide continuous and uninterrupted hot water for multiple household demands at the same time. A tankless water heater comes available in electric or gas configurations suited to your exact needs and specifications.

According to the EPA, water heating ranks as the 3rd largest household energy expense and may reach as much as 25% of the energy consumed in your household. Depending on usage, a household could save up to $384 yearly by using a tankless water heater,

Tankless Water Heater Benefits:

  • Energy savings
  • Convenience
  • Increased Space
  • Reliability

Westside Wholesale caries the finest names in residential tankless water heaters from Rheem Tankless, Bosch, Eemaz, Norritz, Stiebel Eltron, and Wiseman. Browse ankless water heater prices, read reviews, and order online securely. Maxmize savings with our buyer rewards program. The Rheem Tankless Water Heater and Bosch Tankless Water Heater lines are some of the most popular.

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Stiebel Eltron TEMPRA 20 B

Stiebel Eltron TEMPRA 20 B

Stiebel Eltron Tankless Water Heater, 208/240V 70/80A Electric Tempra Whole House - Indoor, 4.5 GPM

Our Price: $640.00
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Rheem RTG-84XLP

Rheem RTG-84XLP

Rheem Tankless Water Heater, Liquid Propane 199,000 BTU Max Direct Vent Whole House Residential/Commercial - Outdoor, 8.4 GPM

Our Price: $849.99
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Bosch 4TWHVK3SII

Bosch 4TWHVK3SII

Bosch Tankless Water Heater Horizontal Vent Kit for 940 ES & 830 ES Models

Our Price: $244.99
as low as: $227.84

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Stiebel Eltron Mini 6

Stiebel Eltron Mini 6

Stiebel Eltron Tankless Water Heater, 208/220-240V 20/24.7A Mini Electric Single-Point - Indoor

Our Price: $159.00
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Rheem RTG20124

Rheem RTG20124

Rheem Tankless Water Heater Flushing Kit

Our Price: $169.99
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Eemax SP55

Eemax SP55

Eemax Tankless Water Heater, 240V 23A Electric Single-Point w/ Top Feed - Indoor

Our Price: $215.45
as low as: $200.37

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Rheem AP12993C

Rheem AP12993C

Rheem Tankless Water Heater Pressure Relief Valve

Our Price: $10.99
as low as: $10.22

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Stiebel Eltron DHC 3-1

Stiebel Eltron DHC 3-1

Stiebel Eltron Tankless Water Heater, 120V 25A Electric Single-Point - Indoor

Our Price: $179.00
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Stiebel Eltron TEMPRA 24 B

Stiebel Eltron TEMPRA 24 B

Stiebel Eltron Tankless Water Heater, 208/240V 88/100A Electric Tempra Whole House - Indoor, 4.5 GPM

Our Price: $674.00
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Stiebel Eltron DHC 8-2

Stiebel Eltron DHC 8-2

Stiebel Eltron Tankless Water Heater, 208/240V 26/30A Electric Single-Point - Indoor

Our Price: $179.00
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Bosch Tronic 3000 US3

Bosch Tronic 3000 US3

Bosch Tankless Water Heater, 120V 29A Electric Point-of-Use (Powerstream Pro RP3P) - Indoor

Our Price: $192.00
as low as: $178.56

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Eemax EX2412

Eemax EX2412

Eemax Tankless Water Heater, 120V 20A Electric - Indoor

Our Price: $215.45
as low as: $200.37

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Stiebel Eltron DHC 6-2

Stiebel Eltron DHC 6-2

Stiebel Eltron Tankless Water Heater, 208/240V 22/25A Electric Single-Point - Indoor

Our Price: $179.00
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Bosch 7709003913

Bosch 7709003913

Bosch Tankless Water Heater Outdoor Kit for Therm Models: C 1210 ES, C 1050 ES, C 950 ES, 940 ES, 830 ES

Regular Price: $123.99
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as low as: $82.21

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Stiebel Eltron DHC 10-2

Stiebel Eltron DHC 10-2

Stiebel Eltron Tankless Water Heater, 208/240V 35/40A Electric Single-Point - Indoor

Our Price: $179.00
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How to Select

How to Select a Tankless Water Heater

The most important factor when deciding which tankless water heater to purchase is based on the number of fixtures you need to get heated water to and the amount of water to heat. It is not uncommon for a homeowner to purchase the tankless unit that seems correct for their application to find that they miscalculated. We always recommend purchasing a tankless unit with redundancy in output; therefore you will never have an issue with lack of hot water.  Most ratings from the manufacturer do not take into account your unique plumbing situation, so consulting a professional is recommended.

Tankless Water Heater Considerations:

  1. Power Type: Electrical, Natural Gas, Liquid Propane. Depending on your house utility configuration, you can connect a tankless unit to any of the following power sources, however, you must consider that an electrical tankless unit will not work in Natural gas applications or Propane, and vice versa.
  2. For Electric Tankless Heating Units, your amperage and voltage are very important. Your breaker size may be too small, or may need to be upgraded to accommodate the new heater. If this is the case, upgrade to a breaker that will have some redundancy in power rating.
    (For example, if your tankless heating unit requires a 40 Amp breaker, we recommend installing a 50 Amp just in case.)
  3. How far your tankless heating unit will be installed from your fixtures. If your heater is too far from your shower, or faucets, they will either get a reduced flow of water, or a lack of heat. This is caused by the added traveling distance the water must travel through your pipes.  If this is a concern for you, consult our staff for expert advice, or consult the installer for recommendations.
  4. Whole house or Point of Use. Point of use tankless units only operates with a single fixture at the point of use. Some point of use models can work with extension kits to expand usage to multiple fixtures. Whereas whole house tankless units are designed for larger volumes and will provide heated water to all fixtures in your household. Once again, it is important to take redundancy into account with Whole house heaters to make sure each fixture has steady, warm flow.

For additional assistance, or for expert advice, contact our Customer Service Department through Live Chat or by telephoning 1 (877) 998-9378.