© Jakob Schoof
The grounds of the Vitos health centre in Marburg, near Frankfurt, are dotted with mature trees and historic buildings from the late 19th century, which have served as a psychiatric clinic for 140 years. At the northern edge of the open grounds, the city of Marburg has established one of the first children’s day-care centres in Germany to achieve the plus energy standard Effizienzhaus Plus (Efficiency House Plus). The building is expected to achieve an annual energy surplus both in terms of final energy and primary energy.