The office building at Herdweg 19 in Stuttgart incorporates a mixed ventilation strategy combining mechanical and natural airflow. Air is supplied and extracted through slotted wall inlets, creating a controlled floor‑wall flow designed to avoid drafts and maintain appropriate comfort levels. The approach reduces space requirements for technical installations and helps lower energy costs.

Thermal comfort is supported by a concrete core activation system used for cooling and heating, complemented by subfloor ventilation convectors that address peak loads. Acoustic absorbers and frameless partition walls contribute to quiet working areas, while wooden interior cladding integrates building services and provides additional sound absorption.

The building’s design also includes flexible interior elements such as window cubes that allow manual ventilation control. These measures form part of a broader strategy aligned with DGNB certification criteria, focusing on environmental and economic requirements as well as occupant wellbeing.

Key figures:

• Building condition: New Construction
• Building type: Commercial office building
• Year of Construction: 2011
• Primary energy consumption: No data
• Energy performance certificate rating: Platinum DGNB certification
• Renewables:  Geothermal energy

_{Image source: DGNB project page (© Blocher Blocher Partners / Klaus Mellenthin)}