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 home. 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. Shop online Securely.

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Rheem MIC-K-16

Rheem MIC-K-16

Rheem Tankless Water Heater 16 Ft. Communication Cable

Regular Price: $23.04
On Sale: $19.20
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Noritz VP4-45ELBOW

Noritz VP4-45ELBOW

Noritz Stainless Steel 4" Diameter Venting 45 Degree Elbow, For NR71, NR98, NR111, NR199, NC250 & NH Series

Regular Price: $51.99
On Sale: $36.60
as low as: $34.04

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Rheem RTG2006EK

Rheem RTG2006EK

Rheem Tankless Water Heater High Altitude Chip for RTG-74XN - Natural Gas (3281-6560 Ft.)

Our Price: $21.99
as low as: $20.45

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Noritz WT4

Noritz WT4

Noritz Stainless Steel 4" Diameter Venting Horizontal Wall Thimble, For NR71, NR98, NR111, NR199, NC250 & NH Series

Our Price: $52.99
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Rheem RTG20214B

Rheem RTG20214B

Rheem Tankless Water Heater Liquid Propane Commercial Conversion Program Chip for RTG-95DVP

Our Price: $25.99
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Bosch TLINK

Bosch TLINK

Bosch Tankless Water Heater Intelligent Link Cascading Kit (7709003962)

Regular Price: $26.99
On Sale: $18.60
as low as: $17.30

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Rheem RTG20214A

Rheem RTG20214A

Rheem Tankless Water Heater Natural Gas Commercial Conversion Kit for RTG-95DV

Our Price: $28.80
as low as: $26.78

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Noritz WT5

Noritz WT5

Noritz Stainless Steel 5" Diameter Venting Horizontal Wall Thimble, For NC380 Series

Our Price: $58.99
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Rheem RTG20214C

Rheem RTG20214C

Rheem Tankless Water Heater Commercial Conversion Kit for RTG-95XN

Our Price: $25.99
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Noritz VP4-48STRAIGHT

Noritz VP4-48STRAIGHT

Noritz Stainless Steel 4" Diameter Venting Rigid Straight Vent Pipe, 48" Length - For NR71, NR98, NR111, NR199, NC250 & NH Series

Regular Price: $75.99
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as low as: $50.31

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Rheem RTG20216A

Rheem RTG20216A

Rheem Tankless Water Heater Commercial Conversion Kit for RTG-84DVN

Our Price: $25.99
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Noritz VP5-90ELBOW

Noritz VP5-90ELBOW

Noritz Stainless Steel 5" Diameter Venting 90 Degree Elbow, For NC380 Series

Our Price: $49.00
as low as: $45.57

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Rheem RTG20000AJ

Rheem RTG20000AJ

Rheem Tankless Water Heater High Altitude Chip for RTG42 - Liquid Propane (3281-6560 Ft.)

Regular Price: $13.99
On Sale: $9.50
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Noritz RC4

Noritz RC4

Noritz Stainless Steel 4" Diameter Venting Vertical Rain Cap, For NR71, NR98, NR111, NR199, NC250 & NH Series

Our Price: $39.99
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Noritz FS4

Noritz FS4

Noritz Stainless Steel 4" Diameter Venting Vertical Fire Stop, For NR71, NR98, NR111, NR199, NC250 & NH Series

Regular Price: $19.99
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151-165 of 192 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.