A five-fold increase in energy efficiency is possible.
Prof. Ernst Ulrich von Weizsäcker
Lecture series "The house is on fire"
29.09.2020, Karl Rahner Academy Cologne
We must learn to use energy more sparingly because the earth's resources of gas, oil, and coal are limited. In the medium term, we should completely abandon the use of fossil fuels.
The energetic renovation of buildings contributes significantly to energy saving efforts.
Using the example of the renovation of an older building, we demonstrate professional solutions and procedures.
By law, minimum requirements are set for thermal insulation in buildings. The new Energy Saving Act (GEG 2021) is based on the EU's 2010 Buildings Directive and is the successor to the Energy Saving Ordinance (EnEV) of 1916, providing guidelines for compliance with the energy performance of buildings. According to the GEG, inadequately insulated structures in existing buildings must be additionally insulated using suitable building materials.
The video below discusses the close interrelationship of people to their built environment. The buildings and urban structures that have been created in different eras are considered cultural assets worth preserving. We should preserve them and at the same time make them more energy efficient.
When you start the video, you can have German or English subtitles faded in via the usual YouTube controls.
If you are initially only interested in the videos on this topic, you can go directly to the corresponding playlist on YouTube. Another playlist shows the progress and results of our research project.
For inhabited or used rooms of an attic, the roof surface forms the largest part of the boundary surface and thus the largest part of the heat exchange surface.
The energy loss is very high in case of insufficient thermal insulation and leaky roof surfaces and windows. Therefore, energy-saving measures in this area are particularly efficient.
The outer walls form the largest part of the boundary of the building envelope and thus the largest part of the heat exchange surface.
Therefore, they are of particular importance for energy-saving measures.