LEV information for designers, installers and examiners

Designers: interpret the needs of their customers to provide effective LEV systems capable of delivering the required control.

Installers: put in the LEV equipment and commission it to ensure it adequately controls contaminant exposure.

Examiners: detect and remedy system defects to ensure that LEV systems continue to deliver effective control.

This website will help designers, installers and examiners work with, and for, their customers to control exposures effectively.

LEV designer/supplier key messages

  • Help the employer to get the right type of LEV.
  • Provide a clear quotation that covers what the employer (client) needs.
  • Match the LEV hoods to control the processes and sources.
  • Provide a User Manual and Log Book.
  • Provide air-flow indicators (or equivalents).

LEV installers/commissioner key messages

  • Don't alter the LEV system design (if it will affect performance).
  • Commission the LEV system thoroughly (ie check it controls exposure effectively).
  • Provide a full commissioning report.

LEV examiners

  • Thoroughly examine and test the LEV system against the commissioning report (or equivalent).
  • Use the full range of relevant assessment techniques.
  • Label all hoods tested; issuing a red label, or equivalent, for those that fail.
  • Provide a comprehensive thorough examination and test report.

Confused by any of the terms? Why not have a look at the glossary.




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Updated 2021-01-15