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What is Local Exhaust Ventilation (LEV)?

LEV is a machine that extracts air from a process as a way of controlling and reducing the exposure of workers to dust, fumes and vapor which could be hazardous to their health.

Why do I need LEV?

“Every year, thousands of workers in Britain develop occupational diseases from breathing in certain dusts, fumes or other airborne contaminants at work. LEV, often called dust or fume extraction, can help clean the air, before people breathe in these harmful substances.” – Health and Safety Executive (HSE)

Why do I need LEV testing?

It is a legal requirement, as set out in the Health and Safety at Work Act 1974, for any employer to maintain working conditions for employees. Any employer that uses LEV techniques in the workplace must have equipment examined and tested at least “every 14 months” to ensure it is working effectively and safely.

What does LEV testing involve?

A thorough examination of equipment including hoods, filters and ducts, measurement of the technical performance using the appropriate equipment and assessment of the effectiveness of the LEV system. Purex will make recommendations should your system not be up to the required standard. All work is carried out according to HSE guidance which governs LEV testing.

What are the regulations for LEV?

The HSE are the government body responsible for the regulation and enforcement of work-related risks to people in the workplace. Dust and fume exposure is a key element of the COSHH 2002 (Control of Substances Hazard to Health) regulations setting out exposure limits, preventative guidelines and ongoing reductions of the contact between people and hazardous gas and particulates. Under COSHH, companies must take steps to prevent, control, maintain and monitor dust and fume exposure in the workplace, as laid out in regulation 9.

COSHH Regulation 9

“Any LEV system must be thoroughly appraised and tested at least once every 14 months.” – COSHH Regulation 9.2.

This is reduced to 6 months in certain circumstances.

How do I get my LEV system tested?

Simply fill out our booking form and we’ll arrange a site visit. We test all LEV equipment on your site – not only Purex fume extraction systems! Get in touch with a member of our friendly team today.

Book Your LEV Test


Purex International Ltd

QWP House, Island Drive,
Capitol Park, Thorne,
Doncaster, South Yorkshire,

Phone: +44(0)1405 746030
Email: purex@purex.co.uk