This technical presentation showcases the implementation of two cleanrooms totaling 600 m² at the VMC site of Grieshaber GmbH, a pharmaceutical logistics company in Ravensburg, carried out by NETZER GROUP as the general contractor, with a particular focus on energy-efficient cleaning processes. The cleanrooms serve for the central cleaning, maintenance, and repair of approximately 900 cryogenic containers that hold active substances, enabling demand-driven, just-in-time deployment.

The rooms were designed as enclosed, overpressure production environments. Temperature, humidity, and particle counts are continuously monitored to meet cleanliness requirements. A key aspect is the cleaning process: hot water at 70 °C is used and cooled to 35 °C before wastewater disposal. Through a two-stage heat recovery system, the waste heat from the cleaning process is utilized, resulting in around 50 % energy savings.

The cleanrooms were implemented as a “room-in-room” construction, with technical equipment and media piping located above the steel structure on a platform to maximize space for storage and maneuvering. Prefabricated, turnkey modules enabled rapid on-site assembly and reduced interface complexity. Central coordination through a single point of contact ensured an efficient project workflow.

The presentation is aimed at professionals and managers in the pharmaceutical industry, particularly technical managers and procurement staff who wish to gain insights into energy-efficient cleanroom processes.

Conclusion: The presentation demonstrates how cleanrooms can be realized with consideration for energy-efficient cleaning processes, heat recovery, and modular construction—achieving sustainable, efficient, and reliable operations.