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A Bosch tankless water heater is usually a compact electric unit for a sink, though Bosch has also sold gas tankless units in North America. Here’s what each line is for.
Bosch Thermotechnology, part of the German Bosch group, sells heating and hot water products. In the U.S., Bosch is best known in water heating for compact electric point-of-use and mini-tank heaters, and it has also sold gas tankless water heaters.
| Line | Type | Typical use |
|---|---|---|
| Tronic 3000 T | Electric mini tank (about 2.5–7 gallons) | Under a sink, laundry or wet bar |
| Tronic point-of-use tankless | Electric instantaneous | Hand washing at one sink |
Mini tanks deliver full faucet flow until the stored hot water runs out, and many plug into a 120V outlet. Instantaneous point-of-use units never run out but have limited flow. See point-of-use water heaters and our point-of-use guide.
A Bosch electric tankless water heater (also called a Bosch electric instant water heater or Bosch instantaneous electric water heater) is best for one sink.
Because Bosch’s North American gas water heater range has changed over time, confirm current availability, warranty and parts support before choosing a Bosch gas unit. Alternatives include Rinnai, Navien and Noritz.
The Bosch Greentherm T9900i SE gas tankless water heater was the flagship condensing model.
Bosch’s electric products are aimed at single fixtures. For a whole-house electric tankless unit, compare Stiebel Eltron, EcoSmart and Rheem RTEX models in our electric tankless category.
Compare under-sink tankless and mini-tank heaters, including Bosch-class models.
Yes. Bosch’s Tronic range includes small electric point-of-use tankless heaters for sinks, as well as electric mini-tank water heaters. They are intended for single fixtures rather than whole houses.
A condensing gas tankless water heater in Bosch’s Greentherm line, designed for whole-home use with high efficiency and PVC venting. Check current availability and parts support before buying.
AquaStar was an earlier name for Bosch gas tankless water heaters. These models are discontinued, though some parts and manuals can still be found.
Several Bosch Tronic mini-tank models are designed for a standard 120V outlet. Check the electrical requirements of the specific model.
This guide is general information for U.S. homeowners, not professional advice. Gas, electrical and venting work must follow the manufacturer’s instructions and local codes, and in most areas requires a licensed plumber, electrician or gas fitter and a permit. Specifications and prices change; always confirm details on the product page and in the installation manual.
