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Christiano and Sofia live with their two children in a housing estate on the outskirts of Hamburg. They want to improve the ecological footprint of their house by using renewable energy.

Marion and Jasha want to scrap their oil heating system in favour of renewable energies. Read here which system the family chooses and why.

Klaus and Gabi want to modernise their heating system inexpensively and stick with gas as the fuel. They are thinking about a combination with solar heat. Here you can read how the couple ultimately decided.

Kurt and Karin have bought an older detached house and are planning a comprehensive modernisation. This includes a new heating system. We take you with us on their journey.

Manfred and Luise want to renovate the oil heating system in their family home. You can read about the challenges they face and how they overcome them here.

For the upcoming replacement of their heating system, Matteo and Aurelia want a solution that is as simple as possible and will continue to use the same fuel in the future.

In the course of the complete renovation, Hannes and Rebecca would like to replace the old oil heating system with a heat pump heating system and add other systems for more living comfort. We take you along with them on their decision-making process.

The large apartment building with 15 residential units was built 15 years ago. Since the landlords are very concerned about environmental protection, they would like to upgrade their property accordingly.

The landlord wants to modernise the apartment building with its six residential units as simply as possible. Read here how he approaches the project and which systems he chooses.

For the currently vacant apartment building in a popular Frankfurt suburb, a businessman is striving to modernise it to KfW Efficiency House level - a project that could serve as a model for other houses in need of renovation.

The owners' association of an apartment building from the 1970s is planning an extensive renovation. Read here which solutions will ultimately be used.

Wolfgang and Maria have had a long working life and are soon approaching retirement. Now they are taking on the challenge of building anew.

Frederik and Stefanie have a large family and thus a high demand for hot water. A hybrid heating system consisting of a heat pump combined with gas promises high comfort and uses renewable energy sources.

Stefanie and Andreas have decided on a prefabricated house in a new housing estate on the outskirts of the city. One thing is clear: for the young parents, only a heat pump heating system with ambient air as the heating source is an option.

Anne and Micha want particularly high-quality and advanced solutions: for example, a combination unit consisting of a heat pump and a central ventilation system. Here you can find out why.

Max and Andrea are planning a new building and are interested in a heat pump and solar thermal.

The plan is to build a new apartment building in a suburb of Karlsruhe. The sunny location could, among other things, allow the use of solar thermal energy. We show you which heating system will be final.

The building owner couple is planning a new apartment building in a low mountain region and is looking for a suitable heating system for the climatic conditions prevailing there. In the following, we show you what the choice is.

The plan is to build a new apartment building at Lake Chiemsee in Bavaria. The builder relies on a split heat pump for the heating. You can find out the reasons for his decision here.

A new building with three to four residential units in an urban environment is planned. The building in the premium segment is intended to appeal to residents who appreciate the combination of high comfort with modern climate-friendly technology.