From 2018 to 2020, the house 23-24 was built on the 5.5-hectare urban district under the ownership of EUREF AG (Berlin). The responsible architect and client representative was EUREF Consulting Gesellschaft von Architekten und Ingenieuren mbH (Berlin). The general contractor commissioned was the WOLFF & MÜLLER Group headquartered in Stuttgart. The new building has a total area of around 18,000 square meters. Of this, GASAG AG, one of the leading energy service providers in the Berlin-Brandenburg region, uses about two-thirds as its new headquarters. The new occupant on the EUREF campus focuses its service range for gas, electricity, and heat supply primarily on renewable energies and efficient technologies.  Pioneering is also the sustainable, ventilated curtain wall facade of the new GASAG AG headquarters. Johannes Tücks, Vorstand EUREF AG and Chief Architect of the EUREF Campus Berlin and Düsseldorf, says: “Sustainable architecture must be considered in the details throughout the entire chain from production, durability, to dismantling and recycling! Here we as architects rely on partners who develop and offer convincing solutions for us.” 

For anchoring the aluminum panels, the fischer BWM aluminum substructure ATK 100 ZeLa was used vertically as the base substructure. The system enables thermal decoupling for increased energy efficiency and sustainability. The passivhaus-certified ZeLa bracket received the certificate "Passivhaus suitable component" from the Passivhaus Institute as an independent certification body. The certificate contains all the key values (localized thermal bridge loss coefficients) and documents the unique position of the support structure compared to conventional, typical wall constructions. On the base substructure ATK 100 ZeLa, the horizontal hat profile 601 was attached. The facade builders then fixed a vertically oriented hat profile, specially developed for the project, as the third layer of the substructure. This special construction allowed the vertical surfaces and pilasters made of aluminum to be securely anchored. Rivets were used to attach the facade panels. At the parapets, the aluminum panels were riveted directly. In addition to the smooth facade panels, edge parts were also installed on the cornices, which were fastened with the clip 107 from the ATK 100 system.

The ventilated curtain wall fits the sustainable overall concept of the new building. The new GASAG AG headquarters has been designed as a KfW Efficiency House 55 with a very high energy standard. This means that the primary energy demand is only 55% and the transmission heat loss is only 70% of the maximum values permitted by the Energy Saving Ordinance. Factors here include triple glazing, thermal insulation, the use of smart metering (digital electricity meters to record electricity consumption), and locally generated renewable energy. Not only in building operation but also during the construction process, EUREF AG and its commissioned architects emphasized sustainability by minimizing emissions as much as possible. On the ground floor, there is a showroom on the energy transition for visitors. The two-story underground garage houses 140 parking spaces for cars as well as an additional 70 parking spaces and charging options for electric cars that residents can also use in the evenings and on weekends. In addition, changing rooms and showers for cyclists are connected to the garage. The roof surfaces and terraces have been greened. Visually and functionally, the facade integrates into the overall concept of Building 23-24 on the EUREF campus, where the future theme of sustainability meets a futuristic design.