Beta This is a new way of showing guidance - your feedback will help us improve it.

Local Exhaust Ventilation (LEV) workplace fume and dust extraction

Effective LEV or dust/fume extraction can carry away airborne contaminants before they can be breathed in.

This website provides practical advice for employers and employees on buying and using LEV and what to do to comply with the law. It will help designers, installers and examiners work with their customers to control airborne contaminants effectively.

What is Local Exhaust Ventilation (LEV)? - video

LEV calculations

Useful calculator for LEV surveyors: conversions, averages, volume flow, air change rate, air density and air velocity.

Use the calculator


Find out information about LEV events that HSE and other organisations are running.

View upcoming LEV events

Free email updates

Sign-up below to receive news and updates on Local exhaust ventilation (LEV).

Updated 2019-02-05