at rest

Condition of the clean-room when all equipment has been installed and the room is ready for use but no personnel is present. This condition is reinstated approx. 20 minutes after ceasing operations. Maximum levels of particles differ substantially from those prescribed for the "in operation" state.

This glossary has been prepared by Dussmann Service, the largest private multi-service provider worldwide. Dussmann Service offers integrated facility management, technical management , catering (e.g. for hospitals, seniors' facilities, child care facilities, schools and universities), security and fire services, reception, cleaning services, vehicle valeting, commercial management and energy management for companies and organizations in both the business & industry and the social and care sectors.

Dussmann Service is represented across the world by its international subsidiaries. Inquiries can also be addressed to contact persons at headquarters in Berlin. Dussmann Service, like Kursana, Dussmann Office and Dussmann das KulturKaufhaus is a division of the Dussmann Group.