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 energy 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 RTGH-95DVLN

Rheem RTGH-95DVLN

Rheem Tankless Water Heater, Natural Gas 199,900 BTU Max High Efficiency Condensing Direct Vent - Indoor, 9.5 GPM

Regular Price: $1,651.99
On Sale: $1,179.99
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Rheem RTGH-84DVLN

Rheem RTGH-84DVLN

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

Regular Price: $1,490.99
On Sale: $1,064.99
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Rheem RTG-84XLN

Rheem RTG-84XLN

Rheem Tankless Water Heater, Natural Gas 180,000 BTU Max Direct Vent Whole House - Outdoor, 8.4 GPM

Regular Price: $1,098.99
On Sale: $784.99
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Rheem RTG-64DVLN

Rheem RTG-64DVLN

Rheem Tankless Water Heater, Natural Gas 150,000 BTU Max Direct Vent Whole House - Indoor, 6.4 GPM

Regular Price: $909.99
On Sale: $649.99
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Rheem RTG-64DVLP

Rheem RTG-64DVLP

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

Regular Price: $909.99
On Sale: $649.99
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Rheem RTE 13

Rheem RTE 13

Rheem Electric Tankless Water Heater, 240V, 4.0 GPM

Our Price: $222.99
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Rheem RTG20211

Rheem RTG20211

Rheem Tankless Water Heater 3" x 5" Direct Vent Vertical Termination Kit for RTG-64DV, RTG-84DV, & RTG-95DV

Our Price: $145.99
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Rheem RTG20151D-1

Rheem RTG20151D-1

Rheem Tankless Water Heater 36" Straight Pipe (Vent Length)

Regular Price: $73.99
On Sale: $52.20
as low as: $48.55

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Rheem RTG20006DW

Rheem RTG20006DW

Rheem Tankless Water Heater Main Digital Remote Control Thermostat

Our Price: $81.60
as low as: $75.89

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Rheem RTG20216B

Rheem RTG20216B

Rheem Tankless Water Heater Liquid Propane Commercial Conversion Program Chip for RTG-84DVP

Our Price: $25.99
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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 RTE 18

Rheem RTE 18

Rheem Tankless Water Heater, 240V 75A Electric Single-Point - Indoor, 5 GPM

Regular Price: $657.99
On Sale: $469.99
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Rheem RTG20210

Rheem RTG20210

Rheem Tankless Water Heater 3"/5" Horizontal Termination Vent Kit

Our Price: $104.99
as low as: $97.64

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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 RTG-74DVN

Rheem RTG-74DVN

Rheem Tankless Water Heater, Natural Gas 199,900 BTU Max Direct Vent Whole House - Indoor, 7.4 GPM

Our Price: $974.99
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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-74XP

Rheem RTG-74XP

Rheem Tankless Water Heater, Liquid Propane 199,900 BTU Max Direct Vent Whole House - Outdoor, 7.4 GPM

Regular Price: $1,287.99
On Sale: $919.99
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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 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 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 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 RTE 3

Rheem RTE 3

Rheem 1.5 GPM Electric Tankless Water Heater, Indoor 110V

Regular Price: $272.99
On Sale: $194.99
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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 RTG20155

Rheem RTG20155

Rheem Tankless Water Heater 4" Horizontal Vent Kit

Our Price: $299.99
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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 RTGH-95DVLP

Rheem RTGH-95DVLP

Rheem Tankless Water Heater, Liquid Propane 199,900 BTU Max High Efficiency Condensing Direct Vent - Indoor, 9.5 GPM

Our Price: $1,329.99
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Rheem RTG-84DVLP

Rheem RTG-84DVLP

Rheem Tankless Water Heater, Liquid Propane 199,000 BTU Max Direct Vent Whole House Ressidential/Commercial - Indoor, 8.4 GPM

Our Price: $879.99
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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

Our Price: $10.99
as low as: $10.22

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Rheem RTG-95DVLN

Rheem RTG-95DVLN

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

Our Price: $1,099.95
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Rheem RTG20037

Rheem RTG20037

Rheem Tankless Water Heater Cosmetic Pipe Cover

Our Price: $84.99
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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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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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Rheem RTGH-95XLN

Rheem RTGH-95XLN

Rheem Tankless Water Heater, Natural Gas 199,900 BTU Max High Efficiency Condensing Direct Vent - Outdoor, 9.5 GPM

Our Price: $1,329.99
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Rheem RTG20040

Rheem RTG20040

Rheem Tankless Water Heater EZ Link Cable

Our Price: $26.00
as low as: $24.18

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Rheem RTG20214D

Rheem RTG20214D

Rheem Tankless Water Heater Liquid Propane Commercial Conversion Program Chip for RTG-84XP

Our Price: $25.99
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Rheem RTG-95XLP

Rheem RTG-95XLP

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

Our Price: $1,099.99
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Rheem RTG20185

Rheem RTG20185

Rheem Tankless Water Heater 4" Vertical Termination Vent Kit for RTG-74PV & GT-199PV

Our Price: $174.99
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Rheem RTG20236A

Rheem RTG20236A

Rheem Tankless Water Heater Natural Gas Commercial Conversion Program Chip for RTG-95DVN

Regular Price: $32.38
On Sale: $26.98
as low as: $25.09

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Rheem RTG-20149C

Rheem RTG-20149C

Rheem Tankless Water Heater 3" Single 90 Degree Elbow for Wall Venting

Regular Price: $51.99
On Sale: $36.50
as low as: $33.95

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Rheem RTG20006DN-1

Rheem RTG20006DN-1

Rheem Tankless Water Heater High Altitude Chip for RTG-74PVN - Natural Gas (6561-9840 Ft.)

Regular Price: $27.99
On Sale: $19.95
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Rheem RTG20006DL-1

Rheem RTG20006DL-1

Rheem Tankless Water Heater High Altitude Chip for RTG-74PVP - Liquid Propane (6561-9840 Ft.)

Our Price: $26.99
as low as: $25.10

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Rheem RTG20060

Rheem RTG20060

Rheem Tankless Water Heater Direct Vent Sweet Termination Kit - 13" to 17" Wall Thickness

Regular Price: $300.99
On Sale: $214.99
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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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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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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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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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Rheem RTG20214C

Rheem RTG20214C

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

Our Price: $25.99
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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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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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Rheem MIC-K-32

Rheem MIC-K-32

Rheem Tankless Water Heater 32 Ft. Communication Cable

Regular Price: $32.99
On Sale: $31.96
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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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Rheem RTG20145

Rheem RTG20145

Rheem Tankless Water Heater 3" Metal Fab Appliance Adapter for RTG-53PV & RTG2-42PV

Regular Price: $85.99
On Sale: $60.90
as low as: $56.64

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Rheem RTG2006EL

Rheem RTG2006EL

Rheem Tankless Water Heater High Altitude Chip for RTG-74XN - Natural Gas (6561-9840 Ft.)

Our Price: $21.99
as low as: $20.45

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Rheem RTG2006EJ

Rheem RTG2006EJ

Rheem Tankless Water Heater High Altitude Chip for RTG-74XP - Liquid Propane (6561-9840 Ft.)

Our Price: $21.99
as low as: $20.45

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Rheem MIC-K-65

Rheem MIC-K-65

Rheem Tankless Water Heater 65 Ft. Communication Cable

Regular Price: $45.99
On Sale: $44.73
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58 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.