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.

61-75 of 209 products Sort by 

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
Qualifies for Pallet Pricing!

Purchase Pallet Items & Save!

Order $2000 in Pallet Items and
Save an Extra 5% off your Pallet!

Qty

Eemax SP3208

Eemax SP3208

Eemax Tankless Water Heater, 208V 14.4A Electric Single-Point w/ Top Feed - Indoor

Our Price: $219.41
as low as: $204.05

Bundle Items & SAVE!

Add 2 : $210.63 ea. (4% off)
4+ : $204.05 ea. (7% off)
+ FREE Shipping
Qty

Wiseman CLENS-KIT

Wiseman CLENS-KIT

Wiseman Everclens Kit Tankless Water Heater Descaling Kit

Our Price: $209.99
as low as: $195.29

Bundle Items & SAVE!

Add 2 : $201.59 ea. (4% off)
4+ : $195.29 ea. (7% off)
+ FREE Shipping
Qty

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
Qualifies for Pallet Pricing!

Purchase Pallet Items & Save!

Order $2000 in Pallet Items and
Save an Extra 5% off your Pallet!

+ FREE Shipping
Qty

Bosch Tronic 3000 US7

Bosch Tronic 3000 US7

Bosch Tankless Water Heater, 240V 30A Electric Single-Point (Powerstream Pro RP7P) - Indoor

Regular Price: $220.52
On Sale: $186.59
as low as: $173.53

Bundle Items & SAVE!

Add 3 : $179.13 ea. (4% off)
4+ : $173.53 ea. (7% off)
Qty

Eemax EX65

Eemax EX65

Eemax Tankless Water Heater, 240V 27A Electric Closed Outlet Flow Single-Point w/ Bottom Feed - Indoor

Our Price: $215.45
as low as: $200.37

Bundle Items & SAVE!

Add 2 : $206.83 ea. (4% off)
4+ : $200.37 ea. (7% off)
+ FREE Shipping
Qty

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
Qualifies for Pallet Pricing!

Purchase Pallet Items & Save!

Order $2000 in Pallet Items and
Save an Extra 5% off your Pallet!

+ FREE Shipping
Qty

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
Qualifies for Pallet Pricing!

Purchase Pallet Items & Save!

Order $2000 in Pallet Items and
Save an Extra 5% off your Pallet!

+ FREE Shipping
Qty

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
Qualifies for Pallet Pricing!

Purchase Pallet Items & Save!

Order $2000 in Pallet Items and
Save an Extra 5% off your Pallet!

+ FREE Shipping
Qty

Bosch Tronic 3000 US9

Bosch Tronic 3000 US9

Bosch Tankless Water Heater, 240V 40A Electric Single-Point (Powerstream Pro RP1P) - Indoor

Regular Price: $211.19
On Sale: $175.99
Qualifies for Pallet Pricing!

Purchase Pallet Items & Save!

Order $2000 in Pallet Items and
Save an Extra 5% off your Pallet!

Qty

Bosch Therm 940 ESO LP

Bosch Therm 940 ESO LP

Bosch Tankless Water Heater, Liquid Propane 199,000 BTU Max Non-Condensing Whole House - Outdoor, 9.4 GPM

Our Price: $1,181.25
Qualifies for Pallet Pricing!

Purchase Pallet Items & Save!

Order $2000 in Pallet Items and
Save an Extra 5% off your Pallet!

+ FREE Shipping
Qty

Bosch GWH C 920 ESC LP

Bosch GWH C 920 ESC LP

Bosch Tankless Water Heater, Liquid Propane 225,000 BTU Max High Output Condensing Commercial - Indoor, 9.2 GPM

Regular Price: $2,603.98
On Sale: $2,169.98
+ FREE Shipping
Qty

Eemax EX48

Eemax EX48

Eemax Tankless Water Heater, 240V 20A Electric Closed Outlet Flow Single-Point w/ Bottom Feed - Indoor

Our Price: $215.45
as low as: $200.37

Bundle Items & SAVE!

Add 2 : $206.83 ea. (4% off)
4+ : $200.37 ea. (7% off)
+ FREE Shipping
Qty

Bosch TSTAT2

Bosch TSTAT2

Bosch Tankless Water Heater AquaStar Wireless Remote Control for 2400 ES and 2700 ES (7709003213)

Our Price: $142.60
as low as: $132.62

Bundle Items & SAVE!

Add 3 : $136.90 ea. (4% off)
6+ : $132.62 ea. (7% off)
Qty

Rheem RTE 3

Rheem RTE 3

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

Regular Price: $272.99
On Sale: $194.99
Qualifies for Pallet Pricing!

Purchase Pallet Items & Save!

Order $2000 in Pallet Items and
Save an Extra 5% off your Pallet!

Qty
61-75 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.