Local exhaust ventilation

Local exhaust ventilation (LEV) systems provide an effective means of controlling exposure to hazardous substances. In the laboratory the main types of LEV are fume cupboards and microbiological safety cabinets. Further information relating to these can be found in the University policy statements on COSHH (S3/14) and Biorisk Management (S5/09).

For other forms of LEV, such as those used within workshops, it is known that many systems can perform badly through poor design, inappropriate additions, or lack of maintenance. Information is provided on their correct use, including:

  • principles of design
  • commissioning, inspection and maintenance
  • modifications to existing LEV systems
  • waste disposal
  • training