Every year, thousands of workers in Britain develop occupational diseases from breathing in certain dusts, fumes or other airborne contaminants at work.
Local exhaust ventilation, often called dust and/or fume extraction, can help clean the air, before people breathe in these harmful substances.
The effective application of LEV requires a good understanding of processes and the dust sources they create. These downloadable videos demonstrate the dangers to be aware of when working with airborne dust.
Useful calculator for LEV surveyors: conversions, averages, volume flow, air change rate, air density and air velocity.
Find out information about LEV events that HSE and other organisations are running.
