Standard
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AS 2243.9:2025
[Current]Safety in laboratories, Part 9: Recirculating fume cabinets
AS 2243.9:2025 specify requirements and recommendations for the selection, safe use, maintenance and testing of recirculating fume cabinets with design and performance requirements for the cabinets and their filtration systems
Published: 28/03/2025
Pages: 33
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
Introduction
1 Scope and general
1.1 Scope
1.2 Normative references
1.3 Terms and definitions
2 Risk assessment
2.1 General
2.2 Risk assessment process
2.3 Limitations of use
3 Types, services and components
3.1 Types of recirculating fume cabinets
3.1.1 General
3.1.2 Up-draught cabinets
3.1.3 Down-draught cabinets
3.2 Services
3.2.1 Mobile cabinets
3.2.2 Services to open-based recirculating fume cabinets
3.2.3 Electrical services
3.2.4 Other services
3.2.5 Controls
3.2.6 Lights
3.3 Filters
3.3.1 General
3.3.2 Supply of filters
3.3.3 Identification of fitted filter(s) in use
3.3.4 Disposal of filters
4 Design and materials of construction
4.1 General
4.2 Recirculating fume cabinet materials
4.2.1 Metals
4.2.2 Plastics
4.2.2.1 General
4.2.2.2 Unplasticized polyvinyl chloride
4.2.2.3 Polypropylene
4.2.2.4 Glass reinforced plastics (GRP)
4.2.2.5 Polymethylmethacrylate
4.2.2.6 Polycarbonate
4.2.2.7 Melamine-formaldehyde and phenolic laminates
4.2.2.8 Transparent plastics materials
4.2.3 Glass
4.2.3.1 General
4.2.3.2 Plate glass
4.2.3.3 Wired glass
4.2.3.4 Laminated glass
4.2.3.5 Toughened glass
4.2.4 Timber
4.3 Filter housing/casing
4.4 Recirculating fume cabinet design
4.4.1 Design
4.4.2 Fan
4.4.3 Fan operation indicator
5 Airflow, fume filtration and vapour absorption
5.1 Requirements for airflow into the recirculating fume cabinet
5.1.1 General
5.1.2 Face velocity
5.1.3 Room airflow
5.1.4 Increasing containment
5.2 Fume filtration and absorption
5.2.1 General
5.2.2 System pressure
5.2.3 Filtration of fine particles
5.2.4 Absorption of fume
5.2.5 Filtration of particulates or aerosols giving off toxic fume
6 Siting and commissioning
6.1 Siting
6.1.1 General
6.1.2 Avoiding airflow disturbances to the recirculating fume cabinet
6.1.2.1 Traffic routes
6.1.2.2 Opposing bench tops
6.1.2.3 Opposing walls, other obstructions and other operators
6.1.2.4 Other recirculating fume cabinets or fume extraction equipment
6.1.2.5 Air supply registers
6.1.2.6 Architectural obstacles
6.1.3 Exits and escape routes
6.2 Commissioning tests
6.2.1 General
6.2.2 Smoke tests
6.2.3 Face velocity
6.2.4 Filter installation
6.2.5 Noise level
6.2.6 Placing in service
7 Recommendations and requirements for use of recirculating fume cabinets
7.1 General procedures
7.2 Before use
7.3 During use
7.4 After use
7.5 Identifying filter saturation
7.5.1 General
7.5.2 Filter failure
7.5.2.1 General
7.5.2.2 Loading of HEPA filters
7.5.2.3 Saturation of the filter
7.5.2.4 Poisoning of the filter
7.5.2.5 Radioactive materials
7.5.2.6 Physical adsorption of organic fume
7.5.3 Methods for detecting filter saturation
7.5.3.1 Periodic monitoring
7.5.3.2 Continuous monitoring
7.6 Fire precautions
8 Servicing and maintenance
8.1 General
8.2 Logbook
8.3 Cleaning
8.4 Filter change
8.4.1 General
8.4.2 Pre-filters
8.4.3 Main filter
8.4.4 HEPA filters
8.4.5 Disposal of saturated filters
8.5 Maintenance schedule
8.5.1 Monthly maintenance
8.5.2 Six-monthly maintenance
8.5.3 Annual maintenance
Appendix A
A.1 Scope
A.2 Apparatus
A.3 Method for smoke testing a recirculating fume cabinet’s performance
A.3.1 General
A.3.1.1 Sequence
A.3.1.2 Existing installations
A.3.1.3 New recirculating fume cabinet installations
A.3.2 Procedure
A.4 Reporting of results
A.5 Assessment
Appendix B
B.1 Scope
B.2 Apparatus
B.3 Determination of face velocity
B.3.1 General
B.3.1.1 Sequence
B.3.1.2 Existing installations
B.3.1.3 New recirculating fume cabinet installations
B.3.2 Procedure
B.4 Reporting of results
Appendix C
Bibliography
Cited references in this standard
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