Iso 8 is the least clean cleanroom classification.
Iso class 8 clean room temperature.
The equivalent fed standard is class 100 000 or 100 000 particles per cubic foot.
By comparison a typical office space would be 5 10 times more dirty.
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.
As a general rule of thumb the cleaner the cleanroom needs to be the more air it will need to use.
Clean room classifications are based on an eight class rating system with an iso class 1 cleanroom being rated the most particle free and iso class 8 allowing the most particles.
Clean room classification iso class.
Iso 16644 1 air cleanliness classes for cleanrooms and clean zones iso classification si english former fed std 209e iso class 3 m 1 5 1 iso class 4 m 2 5 10 iso class 5 m 3 5 100 iso class 6 m 4 5 1 000 iso class 7 m 5 5 10 000 iso class 8 m 6 5 100 000 the required standard of cleanliness of a room is dependent on the task.
As an example iso 8 cleanrooms also known as class 100 000 cleanrooms can be modular or soft walled and have a maximum particle count of 100 000 particles 0 5 um per cubic foot of interior air.
This means that in most facilities the cleanrooms air handling units ahu consume over 60 of all the site power.
Iso clean room classifications are rated according to how much of a particulate of a specific size exists per cubic meter within a given enclosure see second chart.