Moisture control in dry cleaning rooms

In some industries, especially in the manufacturing of lithium batteries, production processes require extremely dry cleanroom environments. Contamination control by water presents a central planning and operational challenge.

The VDI expert recommendation VDI-EE 2083 Sheet 4.3 provides practical guidance for creating and operating areas with dew points of a maximum of 0 °C, often even -50 °C.

Water as a Contaminant in Pure Environments

Dry cleanrooms are used where even low humidity levels can affect production processes or materials. Unlike classical particle prevention, the focus here is on the targeted reduction of water in the air. The VDI-EE 2083 Sheet 4.3 defines requirements for such areas and describes the necessary climatic conditions – without addressing the actual manufacturing processes. It is intended for all professionals planning and operating such extremely dry clean environments.

Sealing of the Building Envelope as a Key Factor

A central topic of the expert recommendation is the airtightness of enclosure surfaces and duct systems. Even minor leaks can allow moisture from the environment to penetrate the controlled area. Removing this infiltrating moisture requires significant energy expenditure. Dew points in this area are achieved through adsorption drying. To prevent damage to the dryers, the release of certain substances, e.g., from seals, must be avoided. The extreme environmental conditions also lead to significantly increased wear in tribo-systems. Corresponding guidance on these points is provided in the VDI expert recommendation.

The VDI-EE 2083 Sheet 4.3 ‘Cleanroom Technology - Dry Cleanrooms’ was published in January 2026 and can be ordered from DIN Media for €89.00. Since May 1, 2026, the VDI expert recommendation has also been available in English.