User Manual

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Siemens Building Technologies
Cerberus Division
01.2002
ISO/DIS 14644-1 Draft International Standard
This standard will supersede the various national standards. The work is at an advanced
stage worldwide and and is about to be approved by the International and European stan-
dards committees ISO and CEN.
Air cleanliness
class
Particle size in µm
Maximum concentration value per m
3
air
N ≥ 0.1 µm ≥ 0.2 µm ≥ 0.3 µm ≥ 0.5 µm ≥ 1µm ≥ 5 µm
ISO 1
10 2
ISO 2 100 24 10 4
ISO 3 1,000 237 102 35 8
ISO 4 10,000 2,370 1,020 352 83
ISO 5 100,000 23,700 10,200 3,520 832 29
ISO 6 1,000,000 237,000 102,000 35,200 8,320 293
ISO 7 352,000 82,200 2,930
ISO 8 832,000 29,300
ISO 9 293,000
VDI 2083 Guidelines sheet 1 (1995)
In these guidelines, dated April 1995, the air cleanliness classes 1 to 6 are practically identi-
cal to the corresponding air cleanliness classes of the U.S. Federal Standard 209D
(Classes 1 to 100,000).
Limit concentration of particles per cubic meter (m
3
) for air cleanliness classes
Air cleanliness
classes
Particle sizes in µm
n
≥ 0.1 ≥ 0.2 ≥ 0.3 ≥ 0.5 ≥ 1.0**
10
n
≥ 5.0 ≥ 10.0
0 150 33 14 – 10
0
1
(1)*
1500
(35)*
330
(8)*
140
(3)*
45
(1)*
10
1
2
(10)*
15,000
(350)*
3,300
(75)*
1,400
(30)*
450
(10)*
10
2
3
(100)*
33,000
(750)*
14,000
(300)*
4,500
(100)*
10
3
4
(1000)*
45,000
(1000)*
10
4
300
(7)*
5
(10,000)*
450,000
(10,000)*
10
5
3,000
(70)*
6
(100,000)*
4,500,000
(100,000)*
10
6
30,000
(700)*
7
***
10
7
300,000 70,000
* Cleanliness classes and particle concentrations per cubic foot (ft#) according to US Federal Standard
209D (for comparison)
** Reference particle size for the definition of classes (not to be measured!)
*** This class was primarily introduced in view of the assessment of clean rooms in rest condition.