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Tankless Water Heaters

About Tankless Heating Units and Accessories

Westside Wholesale offers a wide array of tankless heating products that would suit your home’s or business’ needs. With such a vast selection, you have the ability to keep the hot water running without burning a hole into your pocket. Westside Wholesale offers you the great prices and high quality products that you and your home deserve. With new technology that makes it possible to save space, power, and money, there are many configurations that can be fitted to your needs.

Tankless heating units for sale include the Bosch 240V, 40A Powerstream Pro Electric Point-of-use Tankless Water Heater, Eemax 120V 29A Single Point Electric Tankless Water Heater, Rheem Indoor Tankless Water Heater for 2-3 Bathroom Homes, and Bosch Indoor Tankless Water Heater with Hydro-Generated Ignition.

The tankless water heaters offered by Westside Wholesale operate at high levels of BTUs and some are suitable for usage in high elevations without the addition of a modification chip. Our water heaters allow you to heat your water supply in either 1=room or multi-room applications. For ease of installation and a vast array of resources, Westside Wholesale offers a range of tankless installation supplies including the Rheem Pressure Valve, Bosch 3” Horizontal Vent Kit w/ Air Intake, Rheem Horizontal Vent Kit for RTG-53DV series and etc.

The brands we offer at Westside Wholesale are: Eemax, Stiebel Eltron, Bosch, and Rheem. We have worked hard to bring you the best prices and highest quality of products, with always the thought of the consumer in mind. The configurations offered by these companies are voltages of 120V, 240V, 208V, and 277V. These tankless water heaters can be installed in configurations of indoor, outdoor and both indoor/outdoor. Some of our products also have the ability to convert via a conversion chip to commercial grade usage, without costly repercussions. There are three energy sources that can power your water heaters based on your preference: electric, propane gas, and natural gas. Whether the water heaters are used for a single point, or the whole house, Westside Wholesale is sure to offer the best brands at the best prices.

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Bosch Tronic 3000 US7

Bosch Tronic 3000 US7

Bosch Tankless Water Heater, 240V 30A Electric Single-Point (Powerstream Pro RP7P) - Indoor

Regular Price: $220.52
On Sale: $186.59
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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: $674.99
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Eemax SS015240TC

Eemax SS015240TC

Eemax Tankless Water Heater, 240V 72A Electric Whole House HomeAdvantage in Stainless Steel - Indoor, 3 GPM

Our Price: $607.20
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Bosch Tronic 3000 US9

Bosch Tronic 3000 US9

Bosch Tankless Water Heater, 240V 40A Electric Single-Point (Powerstream Pro RP1P) - Indoor

Regular Price: $211.19
On Sale: $175.99
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Stiebel Eltron Mini 3

Stiebel Eltron Mini 3

Stiebel Eltron Tankless Water Heater, 110/120V 25A Mini Electric Single-Point - Indoor

Our Price: $159.00
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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: $1,124.99
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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: $874.99
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Rheem RTG20006DU

Rheem RTG20006DU

Rheem Tankless Water Heater Digital Remote Control Thermostat

Our Price: $79.85
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Bosch GWH C 920 ES LP

Bosch GWH C 920 ES LP

Bosch Tankless Water Heater, Liquid Propane 225,000 BTU Max High Output Condensing - Indoor, 9.2 GPM

Regular Price: $2,027.00
On Sale: $1,849.99
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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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Bosch 4TWHVK3S

Bosch 4TWHVK3S

Bosch Tankless Water Heater Horizontal Vent Kit for 450/635/715 ES

Our Price: $219.99
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Stiebel Eltron TEMPRA 12 PLUS

Stiebel Eltron TEMPRA 12 PLUS

Stiebel Eltron Tankless Water Heater, 208/240V 44/50A Electric Tempra Plus Whole House - Indoor, 3 GPM

Our Price: $539.00
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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
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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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Bosch 4TWHVK3SII

Bosch 4TWHVK3SII

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

Our Price: $249.99
as low as: $224.99

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76-90 of 181 products Sort by 

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.

Before you pick out your tankless heating unit, you will want to check the following:

  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 calling 1-877-998-9378.