A cleanroom is an environment where airborn particulates are controlled
through an exchange of highly filtered air, and through minimization of
activities that generate particles. For example, a special
is required prior to
entering the cleanroom.
A class 100 cleanroom maintains less than one hundred
particles larger than 0.5 microns in each cubic foot of air space.
It is equivalent to ISO class 5 cleanroom.
This cleanroom has 250 square feet of class 100 space available.
A class 1000 cleanroom has less than 1000 such
particles per cubic foot. It is equivalent to an ISO class 6 cleanroom.
This cleanroom has 600 square feet of class 1000 space available.
In addition to particle control, the cleanroom is temperature
controlled to 70F, 50% RH
help mantain the best
possible environmental conditions when something goes wrong with
the air handling systems.
A comparison between Federal Standard 209 E classification and 1999 ISO 14644-1
classification schemes is given