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Room templates: You can set joint requirements for several rooms by using room templates. You would use this if you need several rooms of one type for a project, possibly for several functions. Room templates are described in Templates Overview/wiki/spaces/WA/pages/1318360553.
Requirement group: You can set joint requirements for parts of the room (parts of the Room Data form) which are common for several rooms, possibly for just one discipline, applicable to all room templates. The use of requirement groups is described in in Groups .
Unique Room Data: This means that the room's requirements are unique, i.e. not linked to a room template or template. Please note that a unique room may still be subject to requirements from a requirement group. More information on Room Data is provided in Room Data .