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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Bosch 7736501253

Bosch 7736501253

Bosch Tankless Water Heater PP Common Venting System Back-to-Back Kit C for 1-2 Therm/Greentherm Models

Our Price: $419.99
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Bosch 7709003775

Bosch 7709003775

Bosch Tankless Water Heater Indoor Freeze Protection Kit for 330 PN, 520 HM, & 520 PN

Our Price: $53.99
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Bosch 7736501117

Bosch 7736501117

Bosch Tankless Water Heater Horizontal Wall Terminal 6" Diameter for Therm/Greentherm PP Common Venting System

Our Price: $219.99
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Bosch 7736500074

Bosch 7736500074

Bosch Tankless Water Heater High Temperature Kit for 830 ES to 1050 ES Models

Our Price: $16.99
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Bosch 7736501132

Bosch 7736501132

Bosch Tankless Water Heater 90 Degree Elbow 6" Diameter for Therm/Greentherm PP Common Venting System

Our Price: $27.99
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Bosch 7736501133

Bosch 7736501133

Bosch Tankless Water Heater 80" Extension Pipe 6" Diameter for Therm/Greentherm PP Common Venting System

Our Price: $89.99
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Bosch 7736501146

Bosch 7736501146

Bosch Tankless Water Heater 45 Degree Elbow 6" Diameter for Therm/Greentherm PP Common Venting System

Our Price: $30.99
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Bosch 7736501135

Bosch 7736501135

Bosch Tankless Water Heater 40" Extension Pipe 6" Diameter for Therm/Greentherm PP Common Venting System

Our Price: $51.99
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Bosch 7736501137

Bosch 7736501137

Bosch Tankless Water Heater 20" Extension Pipe 6" Diameter for Therm/Greentherm PP Common Venting System

Our Price: $33.99
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Bosch Tronic 5000C PRO WH36

Bosch Tronic 5000C PRO WH36

Bosch Tankless Water Heater, 36.0 kW 240V 128A Electric Whole House - Indoor or Outdoor

Our Price: $794.99
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Rheem RTGH-84DVLP

Rheem RTGH-84DVLP

Rheem Tankless Water Heater, Liquid Propane 157,000 BTU Max High Efficiency Condensing Direct Vent - Indoor, 8.4 GPM

Our Price: $1,229.99
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Rheem RTGH-84XLN

Rheem RTGH-84XLN

Rheem Tankless Water Heater, Natural Gas 157,000 BTU Max High Efficiency Condensing Direct Vent - Outdoor, 8.4 GPM

Our Price: $1,199.99
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Rheem RTG-95DVLP

Rheem RTG-95DVLP

Rheem Tankless Water Heater, Liquid Propane 199,000 BTU Max Direct Vent Whole House Residential/Commercial - Indoor, 9.5 GPM

Our Price: $1,099.00
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Eemax PA008277T

Eemax PA008277T

Eemax Tankless Water Heater, 277V 40A 2.5 GPM Electric Whole House ProAdvantage Series - Indoor

Our Price: $462.84
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Noritz VC-4C

Noritz VC-4C

Noritz PVC Venting Outdoor Vent Cap, For NRC83, NRC09, NRC1111 & NCC1991 Series

Regular Price: $230.99
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181-195 of 209 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.

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.