Distinguish Bosch Greentherm, Therm and Tronic models
Bosch provides documentation for gas tankless Greentherm and Therm equipment and electric Tronic families. Its documentation also covers earlier gas products. A full model designation is important when discussing an existing unit instead of assuming every Bosch heater is a current product.
Explain whether the unit serves a single fixture or the whole home. Mention the displayed fault and whether a change is new or longstanding. Point-of-use capacity, whole-home demand and installation faults require different assessments.
Before choosing a replacement
For an older gas heater, confirm repair-part availability before choosing repair. For an electric replacement, review load and application requirements. A proposed current model may require installation changes even if its cabinet looks similar to the existing Bosch equipment.
Plan service around your home.
For a Marietta home with the heater in a basement, garage or utility closet, tell the team about the location and any restricted access. Mention stairs or a narrow removal route when discussing replacement. The installation area can affect the work as well as the choice of equipment.
Compare output at the required temperature rise, simultaneous fixture use and available utility capacity. On-demand heating does not guarantee unlimited flow or immediate hot water at a distant faucet. Learn about repair, replacement and maintenance before you call.
Describe what you can see safely. Leave gas, electrical, venting and pressure-relief work to qualified professionals.