The efficient use of energy in the built environment is a very important issue for a more sustainable future. The building stock accounts for 31% of the global energy consumption, with space heating and cooling representing one-third (up to 60% in cold climates). Building renovations can play an important role in the reduction of the end-user energy consumption. For this reason, a great interest has been put in adequate building analysis and in the development of building retrofit tools.

There are several computer-based optimization tools for building renovation/retrofit. However, these tools aim to determine the best combination of a few Constructive System (CS) and Energy System (ES – lighting, hot water, renewable energy, and HVAC) decision variables, but omit the actual architectural draft in the decision-making process. Therefore, such tools have limited impact in real case scenarios, when deep building renovation may result in profound adaptations to accommodate new occupational functions, and limited impact since only a partial optimization is carried out.

EPSAP_details.pngFigure: Example of a solution for single-family house and its topological requirements.