Enter the greenhouse – Rendering of the 162-room 'passive house' complex under construction in the Bahnstadt experimental zone of Heidelberg.
Frey Architects have incorporated several innovative features to support the group's conception of sustainability.
Up on the roof – The building will open for guests in 2017, and recently received its 'topping out' party.
Clean energy – The buildings use solar and wind power, and the solar powers have the dual function of providing shade in summer.
The 'passive house' concept refers to buildings that can store energy without needing fossil-fuel powered heating or ventilation systems.
Green walls – The complex features vertical and roof gardens which trap carbon and provide an air purification service for the local area.
Social sustainability – Wolfgang Frey has created a 'five-finger principle for sustainability that specifies buildings must be ecological, affordable, innovative, integrative and profitable.
Integrative refers to the comfort and lifestyle of human inhabitants. The Heidelberg complex will host a multi-generation community with a mix of needs for diversity. He hopes they will blend and support each other, with youths providing services for vulnerable people.
No compromise on style – Frey bemoans that sustainable architecture is too often "boring boxes" and aims to deliver an appealing aesthetic with his designs.
Mixed up – The Heidelberg complex represents a continuation of the principles Frey established with previous developments such as this multi-generation college in Freiburg.
Smart Green Tower – Frey is already working on his next project. The 'Smart Green Tower' will be installed in cities across Germany and beyond, "filling in the blanks" of power needs and allowing power plants to operate a reduced baseline.