Our most important findings
Energy efficiency in existing buildings is a prerequisite for technology neutrality.
Ensuring adequate competition between various energy supply options such as renewable energy, heat pumps, synthetic fuels and decarbonized heat networks requires reducing final energy consumption by at least a third before 2050. The more efficient a building is, the more realistic any necessary expansion on the generation side will be.
Power-to-gas can only complement aggressive efficiency policies in the buildings sector, not replace them.
Synthetic fuels are a significant component of energy supply in all 2050 climate protection scenarios. But their contribution by 2030 is only limited, and even between 2030 and 2050 they are considerably more expensive than most energy efficiency measures in the buildings sector. In addition, the bulk of generation from power-to-gas may be allocated to other markets (industrial processes, shipping, air travel and transport by truck).