Bosch Tankless Water Heaters

Bosch tankless water heaters provide a near-limitless supply of hot water in compact, easy-to-install models. Available in gas or electric-powered versions, Bosch tankless water heaters can be rigged to work with single fixtures or to heat water for the whole home. They're effective for spaces that can't traditionally host a hot water outlet and many are suitable to replace traditional water heaters.

Westside Wholesale stocks electric, natural gas and propane tankless water heaters from Bosch, as well as additional installation supplies like remote controls and kits to maintain the efficiency of your systems. Every model offers incredible energy efficiency and are able to provide a reduction of up to 50% in monthly utility bills when compared to conventional tanks that waste energy heating water constantly and have uneconomical sediment build up. No matter which Bosch tankless water heater you choose, you'll have decades of use in your home additions, small office, cabins, back houses and any other location they are installed.

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Bosch Therm C 1210 ESC NG

Bosch Therm C 1210 ESC NG

Bosch Tankless Gas Water Heater, Commercial Indoor Condensing, 225,000 BTU Max, 12.1 GPM

Our Price: $1,899.99
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Bosch Greentherm C 1050 ES NG

Bosch Greentherm C 1050 ES NG

Bosch Natural Gas Tankless Water Heater, 199,000 BTU,10.5 GPM

Regular Price: $2,099.99
On Sale: $1,499.99
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Bosch Therm 330 PN LP

Bosch Therm 330 PN LP

Bosch Propane Tankless Water Heater, 75,000 BTUs, NonCondensing Whole House, Indoor, 3.3 GPM

Our Price: $402.99
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Bosch Therm 520 PN LP

Bosch Therm 520 PN LP

Bosch Tankless Water Heater, Liquid Propane 117,000 BTU Max Piezo Ignition Non-Condensing Whole House - Indoor. 5.2 GPM

Our Price: $674.99
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Bosch Therm C 1210 ES LP

Bosch Therm C 1210 ES LP

Bosch Liquid Propane Tankless Water Heater, 199,000 BTUs, Condensing Whole House, Indoor, 12.1 GPM

Our Price: $1,799.99
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Bosch Therm C 1210 ES NG

Bosch Therm C 1210 ES NG

Bosch Gas Tankless Water Heater, 225,000 BTU, 12.1 GPM

Regular Price: $2,624.99
On Sale: $1,874.99
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Bosch Therm C 1210 ESC LP

Bosch Therm C 1210 ESC LP

Bosch Propane Tankless Water Heater, Commercial, 225,000 BTUs, 12.1 GPM

Our Price: $1,899.99
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Bosch Therm 520 PN NG

Bosch Therm 520 PN NG

Bosch Natural Gas Tankless Water Heater, 117,000 BTUs, Non-Condensing Whole House Indoor, 5.2 GPM

Our Price: $699.99
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Bosch Tronic 5000C PRO WH17

Bosch Tronic 5000C PRO WH17

Bosch Tankless Water Heater, 240V 80A Electric Whole House (Powerstream Pro RP17PT) - Indoor or Outdoor

Regular Price: $608.99
On Sale: $434.70
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Bosch Therm 330 PN NG

Bosch Therm 330 PN NG

Bosch Natural Gas Tankless Water Heater, 75,000 BTU, Non Condensing Whole House, Indoor, 3.3 GPM

Regular Price: $578.99
On Sale: $413.20
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Bosch Therm 520 HN NG

Bosch Therm 520 HN NG

Bosch Natural Gas Tankless Water Heater, 117,000 BTU, 5.2 GPM

Our Price: $714.99
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Bosch Therm 830 ES NG

Bosch Therm 830 ES NG

Bosch Tankless Water Heater, Natural Gas, 175,000 BTUs

Regular Price: $1,273.99
On Sale: $909.99
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Bosch Therm 520 HN LP

Bosch Therm 520 HN LP

Bosch Propane Tankless Water Heater, 117,000 BTU, Whole House 5.2 GPM

Regular Price: $1,018.99
On Sale: $727.41
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Bosch Therm 940 ES NG

Bosch Therm 940 ES NG

Bosch Natural Gas Tankless Water Heater, 199,000 BTUs

Regular Price: $1,469.99
On Sale: $1,049.99
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Bosch AQ4

Bosch AQ4

Bosch Tankless Water Heater Horizontal Vent Kit for 1600H & 1600P

Regular Price: $461.99
On Sale: $329.99
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Bosch Tronic 3000 US12

Bosch Tronic 3000 US12

Bosch Tankless Water Heater, Point of Use, 240V, 50 Amp

Regular Price: $268.99
On Sale: $192.00
as low as: $178.56

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Bosch Therm 830 ES LP

Bosch Therm 830 ES LP

Bosch Tankless Water Heater, Liquid Propane 175,000 BTU Max Non-Condensing Whole House - Indoor or Outdoor, 8.3 GPM

Regular Price: $1,273.99
On Sale: $909.99
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Bosch Therm 940 ES LP

Bosch Therm 940 ES LP

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

Regular Price: $1,476.99
On Sale: $1,054.99
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Bosch Greentherm C 1050 ES LP

Bosch Greentherm C 1050 ES LP

Bosch Tankless Water Heater, Liquid Propane 199,000 BTU Max Condensing - Indoor or Outdoor, 10.5 GPM

Regular Price: $2,099.99
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Bosch GWHC800ESLP

Bosch GWHC800ESLP

Bosch ProTankless Propane Tankless Water Heater, Indoor/Outdoor

List Price: $1,850.00
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Bosch AQ3ES

Bosch AQ3ES

Bosch Tankless Water Heater 3" Horizontal Vent Kit w/ Air Intake

Regular Price: $298.99
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Bosch Therm 940 ESO NG

Bosch Therm 940 ESO NG

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

Our Price: $1,181.25
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Bosch Tronic 5000C PRO WH27

Bosch Tronic 5000C PRO WH27

Bosch Tankless Water Heater, 240V 120A Electric Whole House (Powerstream Pro RP27PT) - Indoor or Outdoor

Regular Price: $951.99
On Sale: $685.99
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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
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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
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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
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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
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Bosch TSTAT2

Bosch TSTAT2

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

Our Price: $142.60
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Bosch Greentherm C 950 ES NG

Bosch Greentherm C 950 ES NG

Bosch Tankless Water Heater, Natural Gas 175,000 BTU Max Condensing Whole House - Indoor or Outdoor, 9.2 GPM

Regular Price: $1,679.99
On Sale: $1,199.99
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Bosch Greentherm C 950 ES LP

Bosch Greentherm C 950 ES LP

Bosch Tankless Water Heater, Liquid Propane 175,000 BTU Max Condensing Whole House - Indoor or Outdoor, 9.2 GPM

Regular Price: $1,679.99
On Sale: $1,228.79
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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 telephoning 1 (877) 998-9378.