Luwa Class 10000 Clean Room
Cleanrooms are classified according to the number and size of particles permitted per volume of air. Large numbers like ""class 100"" or ""class 1000"" refer to FED_STD-209E, and denote the number of particles of size 0.5 mm or larger permitted per cubic foot of air. The standard also allows interpolation, and the Class 1000 are designed to limit particles up to 1000.