TU Dresden, Sporthalle I and connecting building, Energetic refurbishment; Sports hall I: energy upgrading of the facade (outer walls — trapezoidal sheet panels, glass facades on gable sides, new roof structure with new skylights; Refurbishment of the hall floor; New concept of the house-technical installations including lighting; Connectors: energy upgrading of the facade (outside walls, windows, without roof); New concept of the building technology systems incl. lighting