The ambient air outside in a typical city environment contains 35 000 000 particles per cubic meter 0 5 micron and larger in diameter corresponding to an iso 9 cleanroom which is at the lowest level of cleanroom standards.
Iso 9 clean room.
Iso 14644 1 and iso 14698 are non governmental standards developed by the international organization for standardization iso.
Iso cleanroom classifications are usually associated with particulate counts rather than airflow.
An iso 1 is the cleanest whereas an iso 9 is the dirtiest status for cleanroom standards.
Cleanroom testing for compliance.
To measure contaminants found in the cleanroom the standard deployed is a micron or micrometer μm micron measurement represents the cleanroom standard size for.
The latter to cleanrooms where biocontamination may be an issue.
Methods for evaluating and measuring cleanrooms and associated controlled environments.
Iso 14644 1 and iso 14698.
Cleanroom design and construction.
Terms definitions and units.
The primary authority in the us and canada is the iso classification system iso 14644 1.
Ordinary room air is around class 1 000 000 or iso 9.
For instance class 7 cleanroom class 10 000 should contain no more than 2 930 ppm of particulates that are less than 5 microns in size or 352 000 ppm of particulates less than 0 5 microns per cubic meter of room area.