Classification of Cleanrooms

1
Validation in Partnership
Classification of
Cleanrooms - Comparison of International
Standards
Standard and Date Published
Maximum permitted number of particles (equal to,
or greater than, stated size) at rest
Fed.Std.
Fed.Std.
B.S.5295
EU
EN ISO
209D
209E
(1989)
CGMP
14644-1
m
m
m
m
m
m
m
m
0.1
m
0.2
m
0.3
m
0.5
m
1
m
5
m
10
m
25
m
(1988)
(1992)
(1998)
(1999)
ISO 1
3
3
10/m
2/m
NS
NS
NS
NS
NS
NS
ISO 2
3
3
3
3
100/m
24/m
10/m
4/m
NS
NS
NS
NS
3
3
3
3
350/m
75.7/m
30.9/m
10.0/m
M1
NS
NS
NS
NS
9.91/ft
3
2.14/ft
3
0.875/ft
3
0.283/ft
3
3
3
3
3
1
35/ft
7.5/ft
3/ft
1/ft
NS
NS
NS
NS
3
3
3
3
1,240/m
265/m
106/m
35.3/m
M1.5
NS
NS
NS
NS
35/ft
3
7.5/ft
3
3/ft
3
1/ft
3
C
3
3
3
NS
NS
100/m
35/m
NS
0/m
NS
NS
ISO 3
3
3
3
3
3
1,000/m
237/m
102/m
35/m
8/m
NS
NS
NS
3
3
3
3
3,500/m
757/m
309/m
100/m
M2
NS
NS
NS
NS
99.1/ft
3
21.4/ft
3
8.75/ft
3
2.83/ft
3
10
3
3
3
3
350/ft
75/ft
30/ft
10/ft
NS
NS
NS
NS
3
3
3
3
12,400/m
2,650/m
1,060/m
353/m
M2.5
NS
NS
NS
NS
3
3
3
3
350/ft
75/ft
30/ft
10/ft
D
3
3
3
NS
NS
1,000/m
350/m
NS
0/m
NS
NS
ISO 4
3
3
3
3
3
10,000/m
2,370/m
1,020/m
352/m
83/m
NS
NS
NS
3
3
3
3
35,000/m
7,570/m
3,090/m
1,000/m
M3
NS
NS
NS
NS
991/ft
3
214/ft
3
87.5/ft
3
28.3/ft
3
100
3
3
3
NS
750/ft
300/ft
100/ft
NS
NS
NS
NS
3
3
3
26,500/m
10,600/m
3,530/m
M3.5
NS
NS
NS
NS
NS
750/ft
3
300/ft
3
100/ft
3
E
3
3
3
NS
NS
10,000/m
3,500/m
NS
0/m
NS
NS
F
3
3
NS
NS
NS
3,500/m
NS
0/m
NS
NS
A
3
3
NS
NS
NS
3,500/m
NS
1/m
NS
NS
B
3
3
NS
NS
NS
3,500/m
NS
1/m
NS
NS
ISO 5
3
3
3
3
3
3
100,000/m
23,700/m
10,200/m
3,520/m
832/m
29/m
NA
NA
3
3
3
75,700/m
30,900/m
10,000/m
M4
NS
NS
NS
NS
NS
3
3
3
2,140/ft
875/ft
283/ft
1,000
3
3
NS
NS
NS
1,000/ft
NS
7/ft
NS
NS
3
3
35,300/m
247/m
M4.5
NS
NS
NS
NS
NS
NS
1,000/ft
3
7/ft
3
G
3
3
3
3
NS
NS
100,000/m
35,000/m
NS
200/m
0/m
NS
H
3
3
3
NS
NS
NS
35,000/m
NS
200/m
0/m
NS
ISO 6
3
3
3
3
3
3
1,000,000/m
237,000/m
102,000/m
35,200/m
8,320/m
293/m
NS
NS
3
3
100,000/m
618/m
M5
NS
NS
NS
NS
NS
NS
2,830/ft
17.5/ft
3
3
3
3
10,000
NS
NS
NS
10,000/ft
NS
70/ft
NS
NS
3
3
353,000/m
2,470/m
M5.5
NS
NS
NS
NS
NS
NS
10,000/ft
3
70/ft
3
J
3
3
3
3
NS
NS
NS
350,000/m
NS
2,000/m
450/m
0/m
C
3
3
NS
NS
NS
350,000/m
NS
2,000/m
NS
NS
ISO 7
352,000/m
3
83,200/m
3
2,930/m
3
NS
NS
NS
NS
NS
3
3
1,000,000/m
6,180/m
M6
NS
NS
NS
NS
NS
NS
28,300/ft
3
175/ft
3
3
3
100,000
NS
NS
NS
100,000/ft
NS
700/ft
NS
NS
3
3
3,530,000/m
24,700/m
M6.5
NS
NS
NS
NS
NS
NS
100,000/ft
3
700/ft
3
K
3
3
3
3
NS
NS
NS
3,500,000/m
NS
20,000/m
4,500/m
500/m
D
3
3
NS
NS
NS
3,500,000/m
NS
20,000/m
NS
NS
ISO 8
3
3
3
NS
NS
NS
3,520,000/m
832,000/m
29,300/m
NS
NS
3
3
10,000,000/m
61,800/m
M7
NS
NS
NS
NS
NS
NS
283,000/ft
3
1,750/ft
3
ISO 9
3
3
3
NS
NS
NS
35,200,000/m
8,320,000/m
293,000/m
NS
NS
L
200,000/m
3
45,000/m
3
5,000/m
3
NS
NS
NS
NS
NS
M
3
3
NS
NS
NS
NS
NS
NS
450,000/m
50,000/m
NS denotes Not Specified denotes Superseded
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