Class 1 Cleanroom is the first classification type of the FED-STD-209 classification standard, the Class 1 Cleanroom corresponds to the Class 3 Cleanroom of the ISO standard.
The maximum allowable particles for particles for a Class 1 Cleanroom are below:
0.1 µm : 35 per cubic foot
0.2 µm : 7 per cubic foot
0.3 µm : 3 per cubic foot
0.5 µm : 1 per cubic foot
Other requirements for Class 1 Cleanroom Classification include :
- Installation of flush/gel ceiling systems (including raised floors)
- Purification of external air with HEPa filters
- Installation of ULPA filters at 99.9995% on .12 microns
- Minimum of 500 to over 600 air changes per hour
