SHS Projects
SHS Projects Limited is a specialist firm of building and M&E Services Engineers operating in all commercial and industrial sectors, but mainly within the high tech industries, particularly Pharmaceutical, Healthcare, Food and Electronics.
We are an independent practice with no ties with Plant or machinery manufacturers, design and build companies, or other specialist building trades.
Yet we work closely with many of these companies and can therefore offer an informed non-bias service, regardless of materials or methods of construction, process or utilities plant and cleanroom furniture.
As well as specialist cleanroom designs, as qualified building services engineers, we can also offer design and project management services for a large number of other applications, such as close control environments, computer rooms, high bay warehousing, laboratories, operating theaters, office refurbishment, retail and residential buildings.
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Calculation of airflow requirements, pressure regimes, filtration, cooling and heating requirements to safeguard the product and to provide comfortable conditions for the operators.Determination of materials and personnel flows and change regimes to ensure compliance with the regulatory authorities, (FDA, MHRA, ACDP).
The following tables indicate the different standards commonly referred to within the industry. Although the ISO 14644-1 has superceded all other standards, the BS and European standards are sometimes used by professionals and operators, when referring to cleanroom classifications.
European Cleanroom Standards
| maximum particles/m³ | ||||
| Grade | at rest | in operation | ||
| ≥0.5 µm | ≥5 µm | ≥0.5 µm | ≥0.5 µm | |
| 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 |
| US FED STD 209E cleanroom standards | ||||||||
| Class | maximum particles/ft³ | ISO | ||||||
| ≥0.1 µm | ≥0.2 µm | ≥0.3 µm | ≥0.5 µm | ≥5 µm | equivalent | |||
| 1 | 35 | 7 | 3 | 1 | ISO 3 | |||
| 10 | 350 | 75 | 30 | 10 | ISO 4 | |||
| 100 | 750 | 300 | 100 | ISO 5 | ||||
| 1,000 | 1,000 | 7 | ISO 6 | |||||
| 10,000 | 10,000 | 70 | ISO 7 | |||||
| 100,000 | 100,000 | 700 | ISO 8 | |||||
| US FED STD 209E was officially cancelled in November 2001, although it is referred to from time to time | ||||||||
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| ISO 14644-1 cleanroom standards | ||||||||
| Class | maximum particles/m³ | FED STD 209E | ||||||
| ≥0.1 µm | ≥0.2 µm | ≥0.3 µm | ≥0.5 µm | ≥1 µm | ≥5 µm | 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 | ||||
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| BS 5295 Cleanroom Standards | ||||||||
| maximum particles/m³ | ||||||||
| Class | ≥0.5 µm | ≥1 µm | ≥5 µm | ≥10 µm | ≥25 µm | |||
| Class 1 | 3,000 | |||||||
| Class 2 | 300,000 | 2,000 | 30 | |||||
| Class 3 | 1,000,000 | 20,000 | 4,000 | 300 | ||||
| Class 4 | 200,000 | 40,000 | 4,000 | |||||
Changes and costs will be monitored rigorously, with regular forecast of final costs against initial agreed budgets, to achieve an on/below budget outcome.
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