For the Anna Paulowna Housing Foundation it was known that 2 housing types were quite outdated. For a while, a new future has been under consideration, ranging from demolition with replacement new construction to the complete replacement of roof, floor and facade.
Nice comparison of the many variants
Considerations often went by feeling and contractors and installers could not tell which choices would be the best. The NEST model from TheEarlyBirds brought a solution. Various variants were made transparent so that well-founded choices can be made for the insulation level, heat technology and energy generation.