Sonnenschiff

'sun ship') is a large integrated office and retail building in Freiburg im Breisgau, Germany.

Sonnenschiff was designed by the architect Rolf Disch (who also built the Heliotrope building) and generates four times more energy than it uses.

Some aspects that make this building particular are its vacuum insulated walls, ventilation with 95% heat recovery, triple paned windows and its energy façade.

This unique integration of retail, commercial and residential space, all with a carbon-free footprint and a positive energy balance distinguish this development.

Apart from the nine penthouses, Sonnenschiff houses several companies such as the high-end supermarket Alnatura, a DM drug store and such institutions as Ökostrom and the non-profit Öko-Institut.