The ENERGON office building was constructed in 2002/2003 as the world’s largest passive house office building, located in the scientific city of Ulm. With its distinctive curved façade, the building was a pioneering model for the passive house standard for many years. The five-story office building, which accommodates 420 workspaces, features a glass-covered atrium that serves as a fresh air distribution hub. Photovoltaic systems have been installed both on the roof of ENERGON and on a nearby parking garage.”