Pharma 2020, Sulzbach-Laufen

Pharma 2020 Laboratory – Sulzbach‑Laufen, Germany
Project overview

The Pharma 2020 building in Sulzbach‑Laufen is a pharmaceutical laboratory and production facility for Holopack Verpackungstechnik GmbH. Laboratories require controlled environments to ensure quality and safety, including stable temperatures and lighting levels. The façade design had to support these conditions while creating a pleasant workplace.

Design challenge

Large glass panels (up to 5 m high) were planned for the laboratory façade to admit daylight and create a transparent appearance. However, labs generate significant heat internally, so controlling solar heat gain is critical. The shading system needed to be maintenance‑free, given the strict hygiene requirements, and had to operate within the sealed environment of the insulating glass.

RetroSolar strategy

The façade uses triple insulating glass units composed of a 12 mm tempered glass pane with solar coating, a 30 mm cavity filled with RETROLuxTherm 20 mm louvers, and a laminated inner pane
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. The louvers are fixed within the cavity, directing sunlight back out while allowing diffuse light to pass. The system covers approximately 3 600 m² of façade area
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. By integrating the louvers into the insulated glass, the design eliminates the need for additional shading and ensures that the system remains dust‑free and maintenance‑free.

Building physics and performance

The combination of solar‑control glass and retro‑reflective louvers reduces solar heat gain, preventing overheating in the laboratories. The high transparency of the system allows daylight to penetrate the space, reducing the need for artificial lighting. The fixed louvers provide consistent performance without the risk of mechanical failure. The façade design supports a comfortable working environment and contributes to the building’s energy efficiency.

Architectural outcome and significance

Pharma 2020 showcases how retro‑reflective micro‑louvers can be integrated into large, high‑performance glazing panels for laboratory use. The system delivers exceptional thermal and lighting performance while meeting stringent cleanliness requirements. The building’s transparent façade communicates openness and technological sophistication, reflecting the innovative nature of the pharmaceutical industry.