ISO Classifications

Browse our product range by ISO standard:

ISO 3 ISO 4 ISO 5 ISO 6 ISO 7

 

About ISO Classifications

There are two primary standards to which cleanrooms are classified to; FED STD 209E in which categorise the number of particles of size 0.5 μm or larger permitted per cubic foot of air and ISO 14644-1 which categorise the number of particles 0.1 μm or larger permitted per m3 of air.

At Integrity Cleanroom, we classify our products using the ISO 14644-1 standard. The table below highlights the differences between the cleanroom standards:

ISO
Class
FED
STD
maximum particles/m3
≥0.1 μm ≥0.2 μm ≥0.3 μm ≥0.5 μm ≥1 μm ≥5 μm
ISO 1   10 2.37 1.02 0.35 00.83 0.0029
ISO 2   100 23.7 10.2 3.5 0.83 0.029
ISO 3 Class 1 1,000 237 102 35 8.3 0.29
ISO 4 Class 10 10,000 2,370 1,020 352 83 2.9
ISO 5 Class 100 100,000 23,700 10,200 3,520 832 29
ISO 6 Class 1,000 1.0×106 237,000 102,000 35,200 8,320 293
ISO 7 Class 10,000 1.0×107 2.37×106 1,020,000 352,000 83,200 2,930
ISO 8 Class 100,000 1.0×108 2.37×107 1.02×107 3,520,000 832,000 29,300
ISO 9 Room air 1.0×109 2.37×108 1.02×108 35,200,000 8,320,000 293,000

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