The level of protection classes are characterised by a whole set of background specifications and measures, which are explained in the regulatory guidelines.These specifications and measures are of a general nature and must be adapted to each particular case.
The following parameters must be defined for each Cleanroom class:
Air cleanliness requirements (particles, micro-organisms)
- Type and position of air filters
- Air flow pattern (uni-directional or turbulent)
- Number of air changes
- Pressure differentials to other rooms
- Allowed number of micro-organisms on surfaces
Personnel and material transfer methods (gowning, sterilisation, etc.)
Permitted operations for production and cleaning (eg. aseptic filling only in class A)
Special building requirements – layout & building finishes