On the naturally ventilated floors, a computerized system known as the building automated system (BAS) , opens and closes windows, vents and sunscreens in response to temperature within the building as well as external environmental conditions. At the southeast elevation, a perforated metal sunscreen protects the glass facade from excess solar heat gain; at the northwest elevation, a series of fixed vertical fins in translucent glass are attached to an exterior catwalk, breaking the sun’s path to shade the glass.
SF Federal Building_Morphosis