Conducting monthly checks on local exhaust ventilation (LEV) systems is a key line of defence in ensuring that they are working correctly to keep people safe. It is also a requirement under the LEV Policy and associated Code of Practice.

Below is a series of short video clips to demonstrate how to set up and use a smoke-generating wand to check for adequate airflow on a variety of LEV systems, which is one of the required monthly checks.

Written instructions including diagrams are set out in the associated Standard Operating Procedure (SOP)Link opens in a new window. This document has been written to be generic to the whole University, so individual departments should adapt and approve it as necessary for their own use.

How to prepare the smoke generating wand for use

How to conduct downflow tests with a smoke wand on a downdraught table

Using a smoke wand to test an LEV capture hood

Useful links

Return to LEV HomepageLink opens in a new window

Smoke wand SOPLink opens in a new window