This Wiki database contains useful information supporting the local transition to zero energy construction. Inspired by the findings in frontrunner regions, this wiki provides an interactive, continually growing Solutions Open Source (SoS) on Passive House technology and compatible renewable energy supply. Generation of the SOS is within the frame of the PassREg project. Special thanks to our partners in the frontrunner regions Hannover (DE), Brussels (BE) and Tyrol (AT) for willingly providing information. You are welcome to visit this site and also to help to complete information, adding articles on relevant subjects or developments in Europe or outside of Europe.