Sustainability Report

The strategy focused on a low-impact, economically efficient approach to construction:

• Compact Addition: The extension was designed as a compact addition to the existing volume, which inherently minimizes the amount of new material required per square meter of added space.

• Existing Substance Retention: A careful handling of the existing substance and clear interfaces with the original structure minimized demolition and maximized the conservation of the existing building's embodied carbon.

• Material Selection: Materials were chosen for low production effort and recycled content in line with the requirements for the klimaaktiv Gold declaration, effectively targeting lower-carbon options over conventional materials.

Operational performance was a primary focus, achieving a very high level of energy self-sufficiency:

• Renewable Energy Generation: A large new PV system was installed with a high annual yield of 202,435 kWhEnd​/a, indicating a substantial offset of the building’s electricity consumption.

• Low Energy Demand: The building achieved a Primary Energy Demand (PEB) of 82 kWh/m2a, reflecting a highly efficient envelope and optimized systems.

• Passive Design: The new central zone is designed with skylights and a generous facade opening on the north side, which minimizes the need for artificial lighting and mechanical ventilation.

The strategies focused on material health and durability to reduce long-term maintenance and replacement cycles:

• Durability: Materials were explicitly chosen and applied for durability to extend the service life of the components.

• Material Health: The materials applied contain no hazardous substances, which simplifies end-of-life recycling and reduces risks during maintenance and replacement.