Therm Series

Operating with a UEF up to .92, the Therm models economically provide hot water on demand. Our tankless water heaters are wall-mounted to save space and only use gas to heat the water when there is a demand. Innovative features that ensure maximum performance to provide virtually endless hot water.

The Therm C 1210 ES is a fully condensing gas tankless water heater. Unlike traditional non-condensing models, condensing technology captures heat from the exhaust gas and uses it to preheat the incoming cold water. This increases efficiency and reduces emissions, giving this high performance tankless water heater up to 98% thermal efficiency.

The 940 ES, our highest capacity non-condensing model was designed to meet the demands of busy households, and offers premium features you expect from Bosch. This model can be installed almost anywhere thanks to its sealed combustion and dual-fan technology.

The 830 ES is another new model from Bosch that offers advanced software, safety and precision controls but requires only 175,000 BTU/Hr input. The 830 ES is ideal for busy households yet is also designed to support Intelligent Cascading, up to 24 units for larger homes.