Viessmann hybrid boiler: High security of supply thanks to the use of electrical cartridge heaters

The new Viessmann hybrid boiler combines the proven, fired shell boiler with additional electric flange heaters.

The electrical steam and heat generation via the hybrid boiler offers many advantages. The focus is on the low-emission and energy-saving provision of energy. Equally important is the high level of operational safety and availability. This ensures smooth processes. We offer coordinated components and therefore economical and future-proof system solutions for industrial use.

What distinguishes the hybrid boiler?

The hybrid boilers use excess electricity to generate steam and heat, thereby reducing the use of conventional fuels. This not only ensures increased climate friendliness, but also operational reliability and cost savings in operation.

The Viessmann hybrid boiler scores with higher efficiency than comparable models that only work with fossil fuels. In this way, those can also be saved. This reduces the overall costs in operation. It also conserves valuable and finite resources. Basically, the operating costs are lower because the hybrid boiler uses cheap electricity. On the one hand, this can be off-peak electricity, on the other hand, the self-generated excess electricity. Electrical support for steam and heat generation also has the advantage of reducing exhaust gas emissions of carbon oxides and nitrogen oxides (COx and NOx). This in turn means that fewer emissions taxes have to be paid by companies. Another advantage of using electrical energy is the high security of supply. If fossil fuels fail, the hybrid boiler can partially bridge this. Interruptions in processes can thus be minimized.

This can be optimized by using electricity in the start-up process. This prevents the flue gas from falling below the dew point. After the operating state has been reached, the primary fuel is then switched over or switched on. This means that fuels can also be used whose flue gas dew points are low or whose condensate components would be harmful. Like all large water space boilers from Viessmann, the hybrid boilers are also H2-ready and the proportionate use of hydrogen is possible.

In addition, peak loads can be compensated for by using hybrid boilers. The control range also increases. This means that a better supply can be guaranteed in the case of partial load decreases.

Finally, the electrical warming offers some advantages in the application. Not only does it enable rapid availability of thermal energy, it also avoids unnecessary burner cycles. This in turn reduces wear and thus saves costs.

Advantages of the hybrid boiler at a glance

  • optimized start-up process
  • H2 ready
  • Balancing peak loads
  • Enlargement of the control range
  • higher efficiency
  • reduced use of fossil fuels
  • lower operating costs
  • Reduction of exhaust emissions COx and NOx
  • Security of supply in the event of a loss of fossil fuels
  • quick availability
  • simple warming and thus avoidance of burner cycling
  • sustainable energy use

Use of electricity in the hybrid boiler

In order to be able to use the electricity sensibly, up to two heating cartridges are installed in the hybrid boiler. As so-called flange heaters, they are connected to the boiler via a socket. They are characterized by a high resistance to corrosion and mechanical loads. Depending on the version, the immersion length of the heating cartridges is up to 4.5 meters.


Make inquiries and areas of application

The electrical part of the hybrid boiler not only supports the main function of generating steam and heat, but also serves as a fuel substitute. There are different application options that can be individually adapted to the situation and needs in consultation with the Viessmann experts. In addition, our experts are at your disposal for further inquiries on topics such as "electrical overheating" or "electrical feedwater preheating".

Significance for the energy transition

If you opt for a Viessmann hybrid boiler, you are making a contribution to the energy transition. To a certain extent, the system uses the so-called power-to-heat principle and uses electricity to generate steam or heat. In this way, either self-generated excess electricity or production peaks from the electricity grid can be used in an ecologically and economically sensible manner. This reduces the use of fossil fuels. Electricity from wind and solar energy does not cause any emissions. In this way, with the hybrid boiler you use a more climate-friendly and at the same time future-proof way. It is also a step in the right direction not to exceed the global warming limit of 1.5 degrees Celsius agreed with the Paris Agreement.