In reality however you can reach an iso 6 clean room with 1 recommendation is 2 airlock.
Iso class 8 clean room temperature.
As a general rule of thumb the cleaner the cleanroom needs to be the more air it will need to use.
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.
The equivalent fed standard is class 100 000 or 100 000 particles per cubic foot.
Clean room classification iso class.
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.
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.
Clean rooms need a lot of air and usually at a controlled temperature and humidity.
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.
Iso 8 is the least clean cleanroom classification.
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.
By comparison a typical office space would be 5 10 times more dirty.