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 (i.e. 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.

Publications

Order a publication offline [PDF 973KB]

Video

Common processes and sources

Tools

Example report form [Word 312KB]
This form is an example which will need to be adapted and expanded to suit specific circumstances of LEV system.
LEV calculations

LEV homepage