Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Components (hierarchy name)
4. components (objects parts)
5. [components by specific context]
6. building divisions
7. rooms and spaces
8. [rooms and spaces by property]

Anotations

Scope note:

Rooms in which efforts are made to keep contamination out, including atmospheric pollutants, by the use of air filters, mats, or other devices, as in assembly rooms for precision products or computer rooms.