Tankless Water Heaters

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Rheem RTG20059

Rheem RTG20059

Rheem Tankless Water Heater Direct Vent Sweet Termination Kit - 9" to 13" Wall Thickness

Regular Price: $286.99
On Sale: $204.99
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Bosch 7709003574

Bosch 7709003574

Bosch Tankless Water Heater Indoor Freeze Protection Kit for 2400 ES

Regular Price: $60.99
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as low as: $40.46

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Noritz H2F-C

Noritz H2F-C

Noritz H2FLOW Anti-Scale Replacement Filter

Our Price: $299.99
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Bosch PTOK

Bosch PTOK

Bosch Tankless Water Heater Outdoor Freeze Protection Kit (7709003913)

Our Price: $143.99
as low as: $133.91

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Stiebel Eltron Mini 4

Stiebel Eltron Mini 4

Stiebel Eltron Tankless Water Heater, 208/220-240V 12.6/15.2A Mini Electric Single-Point - Indoor

Our Price: $159.00
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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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Stiebel Eltron TEMPRA 15 PLUS

Stiebel Eltron TEMPRA 15 PLUS

Stiebel Eltron Tankless Water Heater, 208/240V 52/60A Electric Tempra Plus Whole House - Indoor, 3 GPM

Our Price: $710.00
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Stiebel Eltron DHC 4-2

Stiebel Eltron DHC 4-2

Stiebel Eltron Tankless Water Heater, 208/240V 14/16A Electric Single-Point - Indoor

Our Price: $179.00
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Eemax PA014240TC

Eemax PA014240TC

Eemax Tankless Water Heater, 240V 64A Electric Whole House ProAdvantage Series - Indoor, 3 GPM

Our Price: $712.16
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Stiebel Eltron TEMPRA 15 B

Stiebel Eltron TEMPRA 15 B

Stiebel Eltron Tankless Water Heater, 208/240V 52/60A Electric Tempra Whole House - Indoor, 3 GPM

Our Price: $604.00
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Stiebel Eltron DHC 4-3

Stiebel Eltron DHC 4-3

Stiebel Eltron Tankless Water Heater, 277V 17A Electric Single-Point - Indoor

Our Price: $179.00
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Noritz VK4-V1

Noritz VK4-V1

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

Our Price: $219.99
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Eemax PA012240T

Eemax PA012240T

Eemax Tankless Water Heater, 240V 48A Electric Whole House ProAdvantage Series - Indoor, 2.5 GPM

Our Price: $460.16
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Eemax PA007240T

Eemax PA007240T

Eemax Tankless Water Heater, 240V 27A Electric Whole House ProAdvantage Series - Indoor, 2.5 GPM

Our Price: $454.88
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Eemax PA005240T

Eemax PA005240T

Eemax Tankless Water Heater, 240V 20A Electric Whole House ProAdvantage Series - Indoor, 2.5 GPM

Our Price: $452.23
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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 calling 1-877-998-9378.