How to have a net-energy positive systems without having to replace the entire elevator

At the Energy Efficiency Global Forum in Washington DC thyssenkrupp today showcased its latest innovation in making urban mobility greener: a net-zero energy system which can be used for existing elevators. With buildings now accounting for as much as 40% of global energy consumption, this breakthrough marks a milestone moment for the building industry and Read more about How to have a net-energy positive systems without having to replace the entire elevator[…]