The purpose of chilled ceilings is to create a room climate which comforts human beings. What you want to achieve is a climate which guarantees health and comfort for people in the room. To balance these high demands you need chilled surfaces, especially chilled ceilings. In offices, there are very high demands on the ability of the working people to concentrate, whilst there is relatively few physical movements. The thermal comfort plays an important role on this subject. Thus air draughts and uncomfortable radiations shall be avoided whenever possible. In addition, it is absolutely necessary to avoid layers of cold air in foot level and layers of warm air in shoulder/head level. Wherever standard systems fail, you can achieve this through usage of chilled surfaces. Chilled ceilings are made by durlum on the basis of hingeable rectangular panel systems.