Viessmann

Viessmann Vitotherm is a range of compact electric instantaneous water heaters from the German brand Viessmann. The heater warms water instantly as it flows through, making it ideal wherever hot water is only needed at a single outlet, such as a washbasin or kitchen sink.

Models in the EI range differ in output – from smaller variants (for example the EI5.A3 with 3.5 kW output) to more powerful units (the EI5.A6 with 5.7 kW output), allowing you to choose a heater that exactly matches your needs.

Frequently Asked Questions

• How many outlets can a Vitotherm heater supply? The Viessmann electric instantaneous water heater is designed for a single outlet.
• What output should I choose? A higher output provides a greater flow of hot water, so it's worth choosing a model based on whether the heater will serve just a washbasin or also a shower.
• Is a separate electrical connection required? Because of the higher power draw, most models require a separate protected circuit – check the exact requirements in the technical documentation for the specific model.