BS 7989:2001

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Safety
5 Materials of construction
6 Services
7 Filtration systems
8 Type test procedures
9 Efficiency testing for installed gaseous phase
   filter
10 Marking
11 Commissioning
12 Information to be supplied with the fume cupboard
Annex A (informative) Gaseous phase filter tests for
         efficiency
Annex B (informative) Monitoring and maintenance -
         recommendations to the user
Annex C (normative) Gaseous phase filter test for
         capacity using propan-2-ol
Annex D (normative) Commissioning
Bibliography

Describes requirements for fume cupboards designed to recirculate air back to the room after filtering out specified pollutants.

This British Standard specifies requirements for fume cupboards designed to recirculate air back to the room after filtering out specified pollutants. This British Standard does not specify requirements for fume cupboards of the type dealt with in BS 7258.

This British Standard is not applicable to recirculatory filtration fume cupboards of the following types:

• recirculatory filtration fume cupboards for work on radioactive materials;
• recirculatory filtration fume cupboards for work on microbiological agents;
• high thermal load recirculatory filtration fume cupboards;
• recirculatory filtration fume cupboards employing wet scrubbing systems.

This British Standard is not intended to apply to small enclosures intended only for applications such as weighing, in which the filter retention capacity is likely to be small.