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Cleanroom Technical Information

Shop All Cleanrooms
Basics of... Cleanrooms

Cleanrooms are classified according to the number and size of particles permitted per volume of air. ISO 14644 Standards were first formed from the US Federal Standard 209E Airborne Particulate Cleanliness Classes in Cleanrooms and Clean Zones. ISO 14644-1 Standards specify the decimallogarithm of the number of particles 0.1 µm or larger permitted per cubic meter of air.

ISO 14644-1 Cleanroom Standards



CLASS

Maximum Particles/m3

≥0.1 µm

≥0.2 µm

≥0.3 µm

≥0.5 µm

≥1 µm

≥5 µm

FED STD 209E
Equivalent

ISO 1

10

2

 

 

 

 

 

ISO 2

100

24

10

4

 

 

 

ISO 3

1,000

237

102

35

8

 

Class 1

ISO 4

10,000

2,370

1,020

352

83

 

Class 10

ISO 5

100,000

23,700

10,200

3,520

832

29

Class 100

ISO 6

1,000,000

237,000

102,000

35,200

8,320

293

Class 1000

ISO 7

 

 

 

352,000

83,200

2,930

Class 10,000

ISO 8

 

 

 

3,520,000

832,000

29,300

Class 100,000

ISO 9

 

 

 

35,200,000

8,320,000

293,000

Room Air


Minimum Protective Apparel Guide




APPLICATION

ISO Class 8
Class 100,000)

ISO Class 7
(Class 10,000)

ISO Class 6
(Class 1,000)

ISO Class 5
(Class 100)

ISO Class 4
(Class 10)

Hair Cover

X

X

X

X

X

Face Mask

 

X

X

X

X

Coveralls

 

 

X

X

X

Shoe Covers

X

X

X

X

X

Gloves

 

 

X

X

X

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