This guidebook is intended to provide a holistic formulation of hygiene-related constructional, technical and organizational requirments to be observed in the planning, manufacture, exectuion, operation and maintenance of ventilating and air-conditioning systems. These requirements primarily serve to protect human health, although they may be the consequence of technical conditioins.Contains illustrations, some in color. Includes bibliographical references.REHVA Guidebook No. 9 (based on VDI 6022)Units: SI(Title may also be listed as REHVA/Hygiene Requirements for Ventilation and Air-Conditioning)