Bosch Condensing Tankless Water Heaters

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Bosch Condensing Tankless Water Heater Models for Residential & Commercial Applications   

  • Greentherm models are ENERGY STAR rated
  • Offer maximum efficiency during high demand
  • Multiple venting options


  • Commercial Therm Model provides up to 98% thermal efficiency
  • Space saving design affords easy access
  • Cascade option up to 24 units

Londonderry, NH – Bosch offers two new models of condensing gas-fired tankless water heaters for domestic hot water on demand applications.  Greentherm C 1050 ES and C 950 ES are both ENERGY STAR® rated models featuring condensing technology for up to 10% improved energy efficiency over non-condensing models, with an energy factor up to 0.94. They are now equipped with an automated and fully modulating bypass for unsurpassed temperature stability. 

Bosch Greentherm condensing tankless water heaters offer maximum efficiency all the time – at high and low mass flow rates.  The wall-mounted units offer multiple venting options including fast and simple concentric PP up and out, and up to four unit cascades vented together through a sidewall or roof with the new Polypropylene Common Venting System from Bosch.

For commercial applications, Bosch offers its high performance Therm C 1210 ESC tankless water heater providing up to 98% thermal efficiency. The gas-fired,

condensing Bosch Therm C 1210 features a space saving design, affording easy servicing access, and can be cascaded using up to 24 units to satisfy requirements up to 240 gallons per minute for jobs such as tank loading, solar thermal recirculation, radiant floor and space heating applications. Its condensing heat exchanger captures heat from exhaust flue gases and uses the latent heat to preheat incoming cold water, increasing each unit’s efficiency up to 10% over non-condensing


Venting options include direct, vertical or horizontal, and PP common venting of up to four units.  Available in both NG and LP models. 

For more information on the full line of tankless water heaters from Bosch. visit

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