Sustainability Report

Several material and structural decisions have documented environmental benefits:

Material selection

• The project used materials corresponding to the highest ecological quality level of the DGNB system. 
• 80 percent of the timber used came from sustainably managed forests. 
• The project predominantly used a steel-and-glass construction with reinforced-concrete elements.
• Sources report the predominant use of HFKW-free insulation materials and avoidance of PVC in windows, doors and interior construction.

Structural efficiency and flexibility

• The external steel support structure carries the loads at the façade, allowing the interior façade zone to remain column-free.
• This produces a flexible interior structure, allowing office layouts to be changed without fundamentally altering the primary structure. The LOVE source specifically describes the interior as completely flexible.
• The external net-like structure therefore serves both an architectural and structural function rather than being purely decorative.

The project incorporated several documented measures:

Reduced heating and cooling demand

• The building uses thermally activated concrete slabs / concrete-core activation.
• Heating and cooling are also supported by heating/cooling ceiling systems.
• These systems operate at relatively low temperatures.

Ventilation with heat recovery

• The ventilation system uses rotary heat exchangers with a heat-recovery rate of more than 75 percentage.

Waste-heat recovery

• Waste heat from the building's data centre is used.
• Waste heat contributes to peak-load coverage, with district heating providing additional peak-load capacity.

Renewable energy

• The building has photovoltaic generation.
• A documented source gives the PV system a maximum output of 15 kW.
• Rooftop wind installations were also incorporated.
• The PV system had generated approximately 92,000 kWh by the end of 2022.

High-performance façade

• The building uses high-performance insulating glazing with solar-control properties.
• The façade glazing combines solar control, daylight transmission and thermal insulation, reducing cooling and artificial-lighting requirements.

Solar shading

• External shading / solar-control systems further reduce solar heat gains.

Several design decisions can contribute to longer service life and reduced replacement requirements:

• The building uses robust structural systems, including its external steel support structure.
• The flexible column-free interior allows workplace layouts to be changed without requiring major structural intervention.
• The building's technical systems were designed as integrated, energy-efficient systems rather than relying solely on conventional heating and cooling.
• The use of durable façade and building components supports long-term building operation.