There is usually a misunderstanding here. Cleanrooms in ISO classes 1-4 are only needed in the rarest of cases. For example, there are sub-sectors of wafer production that produce in nanoscale areas and rely on automated production in ISO classes 3 and 4. Or space travel must guarantee absolute sterility for certain operations in order not to infect other planets with alien germs.

But even there, an ISO Class 1 cleanroom is almost only a theoretical idea. According to our research, there are actually only three cleanrooms in the world that achieve these conditions. The cleanest cleanroom in the world is said to be an ISO cleanroom at the Fraunhofer Institute in Stuttgart, which was used for a Mars mission.

Achieving the highest particle purity ISO 4 to ISO 1 involves a great deal of effort in filter technology, automation and strict planning of the cleanroom's external environment as well. These elaborate cleanroom solutions are usually only commissioned by corporations or governments and are planned in specific project work that often takes years. The construction costs are correspondingly high, as are the operating costs.

A modular system such as the one offered by Schilling Engineering cannot achieve these high cleanliness classes. As described, however, they are also only very rarely necessary. Therefore, our cleanrooms are precisely tailored to the requirements and processes of our customers. Because we plan and build cleanrooms according to the motto: as much as necessary and as little as possible.