The first wooden elements of our house demonstration unit (HDU) which we will built for the final of the Solar Decathlon Europe 21/22 in Wuppertal are currently being manufactured. Our partner Holzius is producing the walls and ceiling without the use of any glue. Then it will be sent to our partner Petershaus that is responsible for assembling the parts. Besides our EnergiBUS system those are the first physical objects of our HDU. We are looking forward to the coming weeks and the SDE21/22!