The task was to assist in the thermal design of the glazed reception building of the new BBraun factory from the point of view of thermal comfort. We performed multi-zone dynamic building energy simulations of the building to examine the winter and summer thermal comfort with the precise settings of the structures, building use, cooling and heating systems and control given by the developers. As a result of the work, we managed to develop a constructional (especially glazing) and HVAC concept acceptable to all parties to ensure the expected comfort level.