1-866-225-5124 Available 7 days, 8am - 6pm Eastern

Save Up to 50% on Water Heating Costs with Bosch Tankless Water Heaters Exceptional Efficiency. Reliability. Advanced Technology.

PLUS, Add a Full Year to Your Warranty, Free!

Accredited Bosch Contractor Factory-trained Bosch ABC Contractors provide additional 1‑year warranties!


Endless Hot Water, Everywhere You Need It!

If your home is utilizing a traditional tank style water heater that is more than eight years old, then it's time to upgrade to a modern system with advanced design and engineering to save space in your home, reduce utility bills and conserve resources.

A tank style hot water heater keeps water hot 24 hours a day, whether it is needed or not. Bosch tankless water heaters produce hot water only when needed, reducing needless energy consumption and cutting water heating costs by up to 50%. Modern condensing technology captures heat from the exhaust gas and uses it to preheat the incoming cold water. The result is high efficiency and instant hot water! Operating with an energy factor up to 0.95, Bosch gas condensing Greentherm models economically provide domestic hot water on demand.

Bosch Exclusive Safety and Precision Controls

Bosch is the only major tankless water heater manufacturer to offer a built-in digital control panel with the ability to adjust water output temperatures in precise 2°F increments across the entire temperature range, an important safety feature for homes with children and elderly family members. This feature is available on the Therm and Greentherm models.

Bosch Patented Design for Scale Prevention

Bosch’s patented heat exchangers offer dual-fan and fully modulating vertical burner design to achieve an “even” flame pattern, preventing hot-spots and corrosion common with other tankless water heater burner designs. Bosch's proprietary built-in turbulators help to prevent scale build-up that can reduce operating efficiency, allowing Bosch tankless water heater to work efficiently and last longer.

Peace-of-Mind Warranties — Best in Industry

Bosch products are also renowned for their reliability and longevity. All products are built using top-grade materials and tested to meet the highest standards for performance and sustainability, which is why Bosch can back tankless products with the most generous warranties in the industry. See complete warranty details at boschheatingandcooling.com.

Tankless Guide

Tankless Water Heater Selector Guide

There are many factors to take into account when selecting the right water heater: the number of people, type of showers and tubs, water pressure and geographic region.

Download guide »
2016 Readers Choice

Bosch Tankless Water Heaters Win Reader’s Choice Award

Bosch is cited for sustainable products and environmental stewardship in Green Builder Media’s annual reader survey.

Learn more »

Tankless Hot Water Heater Line-up

Bosch Greentherm Series

The Bosch Greentherm models are now equipped with an automated and fully modulating bypass for unsurpassed temperature stability. By capturing the latent heat of the flue gases the efficiency of the water heater is boosted by approximately 10%.

Bosch Therm Series

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.

Bosch Tronic 5000 Series

The compact and powerful Tronic 5000 Series electric whole house tankless water heaters can be installed virtually anywhere inside the home. They are 97% efficient with no stand-by loss and have modulating elements that ensure a constant output temperature for hot water comfort.

Bosch Tronic 3000 Series

Compact point-of-use / under-sink tankless water heaters are designed to provide an endless supply of hot water for kitchen and bathroom sinks. These units provide 98% efficiency with minimal stand-by loss and most models are equipped with high/low kW settings.