The lower the iso class the more stringent the requirements for keeping particles and contamination to the acceptable levels of the room class.
Iso class 8 clean room temperature.
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 classification iso class.
By comparison a typical office space would be 5 10 times more dirty.
This means that in most facilities the cleanrooms air handling units ahu consume over 60 of all the site power.
Clean rooms need a lot of air and usually at a controlled temperature and humidity.
Iso 8 is the least clean cleanroom classification.
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.
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.
The equivalent fed standard is class 100 000 or 100 000 particles per cubic foot.
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.