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 DHC-E 12

Stiebel Eltron DHC-E 12

Stiebel Eltron Tankless Water Heater, 208/240V 44/50A Electric Single-Point - Indoor

Our Price: $299.00
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Rheem RTG20216B

Rheem RTG20216B

Rheem Tankless Water Heater Liquid Propane Commercial Conversion Program Chip for RTG-84DVP

Our Price: $25.99
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Eemax SS038240T2T2

Eemax SS038240T2T2

Eemax Tankless Water Heater, 240V 160A Electric Whole House HomeAdvantage in Stainless Steel - Indoor, 6 GPM

Our Price: $1,031.60
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Bosch Therm 940 ESO NG

Bosch Therm 940 ESO NG

Bosch Tankless Water Heater, Natural Gas 199,000 BTU Max Non-Condensing Whole House - Outdoor, 9.4 GPM

Our Price: $1,199.99
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Rheem RTG-64XLN

Rheem RTG-64XLN

Rheem Tankless Water Heater, Natural Gas 150,000 BTU Max Direct Vent Whole House Residential - Outdoor, 6.4 GPM

Our Price: $678.64
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Eemax SP4277

Eemax SP4277

Eemax Tankless Water Heater, 277V 14.8A Electric Single-Point w/ Top Feed - Indoor

Our Price: $219.41
as low as: $204.05

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Eemax SP48

Eemax SP48

Eemax Tankless Water Heater, 240V 20A Electric Single-Point w/ Top Feed - Indoor

Our Price: $215.45
as low as: $200.37

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Eemax EX48T

Eemax EX48T

Eemax Tankless Water Heater, 240V 20A Electric Thermostatic Single-Point w/ Bottom Feed - Indoor

Our Price: $281.34
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Rheem RTE 18

Rheem RTE 18

Rheem Tankless Water Heater, 240V 75A Electric Single-Point - Indoor, 5 GPM

Regular Price: $657.99
On Sale: $469.99
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Bosch Therm 940 ESO LP

Bosch Therm 940 ESO LP

Bosch Tankless Water Heater, Liquid Propane 199,000 BTU Max Non-Condensing Whole House - Outdoor, 9.4 GPM

Our Price: $1,199.99
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Eemax SS019240TC

Eemax SS019240TC

Eemax Tankless Water Heater, 240V 80A Electric Whole House HomeAdvantage in Stainless Steel - Indoor, 3 GPM

Our Price: $616.43
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Rheem RTE 9

Rheem RTE 9

Rheem Electric Tankless Water Heater, 3 GPM, 240V 38A Single-Point, Indoor

Regular Price: $272.99
On Sale: $194.99
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Rheem RTG-84DVLN

Rheem RTG-84DVLN

Rheem Tankless Water Heater, Natural Gas 199,000 BTU Max Direct Vent Whole House Residential/Commercial - Indoor, 8.4 GPM

Our Price: $889.37
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Rheem RTG-95XLN

Rheem RTG-95XLN

Rheem Tankless Water Heater, Natural Gas 199,000 BTU Max Direct Vent Whole House Residential/Commercial - Outdoor, 9.5 GPM

Our Price: $1,098.41
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Rheem RTG20210

Rheem RTG20210

Rheem Tankless Water Heater 3"/5" Horizontal Termination Vent Kit

Our Price: $104.99
as low as: $97.64

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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.