Rendering of solar panels being installed on the rooftop of a 1980s office building, as part of the changes made to convert it into a ‘powerhouse’, a building that produces more energy than its occupants consume. “As far as we know, no one has previously renovated an existing office building to this energy standard. This is unique, yet it is something anyone can do”, says Kjetil Thorsen, director and partner in the architectural firm. Project: Powerhouse Kjørbo in Sandvika by FutureBuilt, Snøhetta, Skanska, ZERO, Hydro, Entra Eidom, Sandvika (Norway), 2014.