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Address:
Felcon CDI Limited
19 Cottesbrooke Park
Heartlands
Daventry
Northants NN11 8YL, UK

Tel: +44 (0)1327 312656

Fax: +44 (0)1327 312646

Last up-dated September 2006
© Felcon CDI Limited 2006
All Rights Reserved
Cleanroom Standards



COMPARISON BETWEEN STANDARDS

ISO
14644-1
American Federal
EU GMP
BS5295
:1989
Metric
Imperial
At
Rest
In
Operation
1
-
-
-
-
2
-
-
-
-
-
M1
-
-
-
3
M1.5
1
-
-
C
-
M2
-
-
-
4
M2.5
10
-
-
D
-
M3
-
-
-
5
M3.5
100
A/B
A
E/F
-
M4
-
-
-
6
M4.5
1000
-
-
G/H
-
M5
-
-
-
7
M5.5
10 000
C
B
J
-
M6
-
-
-
8
M6.5
100 000
D
C
K
-
M7
-
-
-
9
-
-
-
-

ISO CLASSIFICATION - m³   ISO CLASSIFICATION - ft³ (EQUIVALENT)
 
ISO
Class
Maximum Concentration Limits (Particles/m³ of air) for Particles Equal to and Larger Than the Considered Sizes Shown Below
0.1µm
0.2µm
0.3µm
0.5µm
1µm
5µm
ISO Class 1
4
2
-
-
-
-
ISO Class 2
100
24
10
4
-
-
ISO Class 3
1 000
237
102
35
8
-
ISO Class 4
10 000
2 370
1 020
352
83
-
ISO Class 5
100 000
23 700
10 200
3 520
832
29
ISO Class 6
1 000 000
237 000
102 000
35 200
8 320
293
ISO Class 7
-
-
-
352 000
83 200
2 930
ISO Class 8
-
-
-
3 520 000
832 000
29 300
ISO Class 9
-
-
-
35 200 000
8 320 000
293 000
 
ISO
Class
Maximum Concentration Limits (Particles/ft³ of air) for Particles Equal to and Larger Than the Considered Sizes Shown Below
0.1µm
0.2µm
0.3µm
0.5µm
1µm
5µm
ISO Class 1
0.28
0.07
-
-
-
-
ISO Class 2
2.83
0.67
0.29
0.1
-
-
ISO Class 3
28.3
6.71
2.89
0.99
0.23
-
ISO Class 4
283
67.1
28.9
9.96
2.35
-
ISO Class 5
2 830
671
289
99.6
23.6
0.82
ISO Class 6
28 300
6 711
2 888
996
235.6
8.3
ISO Class 7
-
-
-
9 967
2 356
83
ISO Class 8
-
-
-
99 675
23 550
830
ISO Class 9
-
-
-
996 753
235 596
8297


EU GMP- m³   EU GMP- ft³ (EQUIVALENT)
     
Grade
Maximum Permitted Number of Particles/m³ Equal to or Greater Than
At Rest
In Operation
0.5µm
5µm
0.5µm
5µm
A
3 500
0
3 500
0
B
3 500
0
350 000
2 000
C
350 000
2 000
3 500 000
20 000
D
3 500 000
20 000
Not Defined
Not Defined
 
Grade
Maximum Permitted Number of Particles/ft³ Equal to or Greater Than
At Rest
In Operation
0.5µm
5µm
0.5µm
5µm
A
99
0
99
0
B
99
0
9 911
57
C
9 911
57
99 108
566
D
99 108
566
Not Defined
Not Defined


AMERICAN FEDERAL STANDARD 209E- m³   AMERICAN FEDERAL STANDARD 209E- ft³ (EQUIVALENT)
     
Cleanliness Class
Class Limits with Maximum Number of Particles/m³
Imperial
Metric
0.1µm
0.2µm
0.3µm
0.5µm
5µm
M1
350
75.7
30.9
10
-
1
M1.5
1 240
265
106
35.3
M2
3 500
757
309
100
-
10
M2.5
12 400
2 650
1 060
353
-
M3
-
7 570
3 090
1 000
-
100
M3.5
-
26 500
10 600
3 530
-
M4
-
75 700
30 900
10 000
-
1 000
M4.5
-
-
-
35 300
247
M5
-
-
-
100 000
318
10 000
M5.5
-
-
-
353 000
2 470
M6
-
-
-
1 000 000
6 180
100 000
M6.5
-
-
-
3 530 000
24 700
M7
-
-
-
10 000 000
61 800
 
Cleanliness Class
Class Limits with Maximum Number of Particles/ft³
Imperial
Metric
0.1µm
0.2µm
0.3µm
0.5µm
5µm
M1
9.91
2.14
0.875
0.283
-
1
M1.5
35.0
7.50
3.00
1.00
-
M2
99.1
21.4
8.75
2.83
-
10
M2.5
350
75.0
30.0
10.0
-
M3
991
214
87.5
28.3
-
100
M3.5
-
750
300
100
-
M4
-
2 140
875
283
-
1 000
M4.5
-
-
-
1 000
7.00
M5
-
-
-
2 830
17.5
10 000
M5.5
-
-
-
10 000
70.0
M6
-
-
-
28 300
175
100 000
M6.5
-
-
-
100 000
700
M7
-
-
-
283 000
1 750



© Felcon CDI Limited 2006

 

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