Iso Class 1 Clean Room

To meet requirements of a clean room as defined by federal standard 209e and newer iso standards all clean rooms must not exceed a particulate count as specified in the air cleanliness class.

Iso class 1 clean room.

The particles range in size from 1 5 microns µm. Iso 14644 1 and iso 14698. As of november 29th 2001 the federal standard 209e has been replaced with iso 14644 1. Iso 14644 1 and older standard fs 209e determine class by the concentration levels of particles.

So for example an iso class 5 cleanroom has at most 105 100 000 particles per m. Iso 6 cleanroom class 1 000 in theory for an entire room to reach iso 6 air cleanliness you need to enter the cleanroom via an iso 8 ante room then go through an iso 7 to finally get into the iso 6 as shown in the image. However class will greatly impact design considerations such as filtration hvac requirements and other design elements. Depending on the iso class there are required averages for the number of air changes per hour.

The number of air changes per hour refers to the volume of filtered air in a single hour divided by the cleanroom volume. Iso 8 is the least clean cleanroom classification. Iso 6 class 1 000 0 127 0 203 25 40 150 240. Small numbers refer to iso 14644 1 standards which specify the decimal logarithm of the number of particles 0 1 µm or larger permitted per cubic metre of air.

The recommended air changes per hour for an iso class 1 clean room is 500 750 and the ceiling coverage should be 80 100. Ordinary room air is around class 1 000 000 or iso 9. The latter to cleanrooms where biocontamination may be an issue. Iso class 1 the cleanest cleanroom is iso 1 used in industries such as life sciences and electronics that require nanotechnology or ultra fine particulate processing.

Iso 14644 1 and iso 14698 are non governmental standards developed by the international organization for standardization iso. The class defines a minimum cleanliness level not a specific design. Iso 8 class 100 000 0 005 0 041 1 8 5 48. In reality however you can reach an iso 6 clean room with 1 recommendation is 2 airlock.

The lower the iso class the more stringent the requirements for keeping particles and contamination to the acceptable levels of the room class. A cleanroom must have less than 35 200 000 particles 0 5 micron per cubic meter and 20 hepa filtered air changes per hour. The equivalent fed standard is class 100 000 or 100 000 particles per cubic foot. Iso 5 class.

The former applies to clean rooms in general see table below. Class iso 146144 1 federal standard 209e average airflow velocity m s ft min air changes per hour ceiling coverage. By comparison a typical office space would be 5 10 times more dirty.