Class 5 Cleanroom is the fifth classification type of the ISO 14644-1 classification standard, the ISO Class 5 Cleanroom corresponds to a Class 100 Cleanroom in the FED-STD-209E Cleanroom classification.
The maximum allowable particles for particles for a ISO Class 5 Cleanroom are below:
0.1 µm : 100000 per cubic metre
0.2 µm : 23700 per cubic metre
0.3 µm : 10200 per cubic metre
0.5 µm : 3520 per cubic metre
1 µm : 832 per cubic metre
5 µm : 29 per cubic metre