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Rheem Tankless Water Heaters

Westside Wholesale offers innovative water heating solutions from Rheem. This reliable manufacturer creates highly efficient appliances with a lot of new technological innovations paying particular attention to today’s home needs.

This manufacturer has all kinds of tankless water heaters from point of use applications to whole house systems. Rheem created water heating solution to fit any needs. These appliances provide a continuous supply of hot water and all models are concentrated on being energy efficient. Moreover, Rheem knows that some have little space for such appliances so engineers worked hard to create a space saving heater that can be installed anywhere.

Rheem tankless heaters product instant hot water while also reducing engery costs. Now, it is possible to load the laundry, turn on the dishwasher, and bathe simultaneously. Additional benefits include LED lights to indicate the active element and standby mode.

These products are acknowledged in the professional sphere as well. Rheem Tankless Water Heaters have been acknowledged as one of the Top Green Products in Building Products Top 100. This rating identifies new products that are used by building professionals. At Westside Wholesale we these products at unbelievable discounts.

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Rheem RTE 7

Rheem RTE 7

Rheem Tankless Water Heater, 240V 29A Electric Single-Point - Indoor, 2.5 GPM

Regular Price: $272.99
On Sale: $194.99
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Rheem RTG-64XLP

Rheem RTG-64XLP

Rheem Tankless Water Heater, Liquid Propane 150,000 BTU Max Direct Vent Whole House - Outdoor, 6.4 GPM

Our Price: $675.99
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Rheem RTG20216C

Rheem RTG20216C

Rheem Tankless Water Heater Natural Gas Commercial Conversion Program Chip for RTG-84XN

Our Price: $25.99
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Rheem RTE 9

Rheem RTE 9

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

Regular Price: $272.99
On Sale: $194.99
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Rheem RTE 27

Rheem RTE 27

Rheem Tankless Water Heater, 240V 112A Electric Single-Point - Indoor, 5 GPM

Regular Price: $1,021.99
On Sale: $729.99
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Rheem RTE 3

Rheem RTE 3

Rheem Tankless Water Heater, 110V 29A Electric Single-Point - Indoor, 1.5 GPM

Regular Price: $272.99
On Sale: $194.99
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Rheem RTG20155

Rheem RTG20155

Rheem Tankless Water Heater 4" Horizontal Vent Kit

Regular Price: $363.99
On Sale: $259.99
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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: $674.99
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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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Rheem RTG20124

Rheem RTG20124

Rheem Tankless Water Heater Flushing Kit

Our Price: $169.99
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Rheem AP12993C

Rheem AP12993C

Rheem Tankless Water Heater Pressure Relief Valve

Regular Price: $10.99
On Sale: $7.49
as low as: $6.74

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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: $1,049.99
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Rheem RTG20037

Rheem RTG20037

Rheem Tankless Water Heater Cosmetic Pipe Cover

Our Price: $69.99
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Rheem RTG20058

Rheem RTG20058

Rheem Tankless Water Heater Direct Vent Sweet Termination Kit - 5" to 9" Wall Thickness

Regular Price: $265.99
On Sale: $189.99
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16-30 of 60 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.