LEV Testing

It is a legal requirement that LEV systems are tested at no more than 14 month intervals, effectively annually.


We carry out LEV testing and can offer the following services:

  • Fully qualified tester to BOHS P601
  • Detailed photographic report
  • Upgrade, design and installation of LEV systems
  • Testing of dust extraction for wood machinery
  • Testing of fume extraction on laser cutters
  • Testing of fume extraction on brazing hearths


Thorough Examination and Test should include:

  • Visual inspection of all parts of the system
  • Check fan rotation is correct
  • A dust lamp test to make fine dust visible
  • Measurement of airflow in various parts of the system
  • A detailed report with any recommendations


Please call to arrange a free survey and quote



What is LEV?

LEV stands for Local Exhaust Ventilation

LEV is a ventilation system that takes dusts, mists, gases, vapour or fumes out of the air so that they can’t be breathed in.

It is described as local because it captures contaminated air from as close to the source as possible.


Properly designed LEV will:

■ collect the air that contains the contaminants;

■ make sure they are contained and taken away from people;

■ clean the air (if necessary) and get rid of the contaminants safely.


Wood dust

Most LEV systems in schools are for wood dust.

Wood dust is a substance hazardous to health

Hardwoods tend to produce finer dust than softwoods and some are very harmful or even toxic

  • Laburnum
  • Yew
  • Iroko


Workplace Exposure Limit (WEL) = 3mg/m3

Workplace Exposure Limit (WEL) = 2mg/m3 from January 2024

Respirable dust is invisible and stays airborne for some time


The employer (owner of the LEV system) has legal responsibilities under the Health and Safety at Work Act 1974 and Control of Substances Hazardous to Health Regulations (COSHH) 2002.


  • Every LEV system must be maintained to ensure it continues to protect the operator
  • Every LEV system must undergo a Thorough Examination and Test at no more than 14 month intervals, effectively annually
  • Test records must be kept for a minimum of 5 years
  • The test must be carried out by a competent person.

The BOHS P601 qualification is the minimum level you should expect from an LEV tester

BEWARE:     Many testers do not have this qualification and so many systems are not adequately or correctly tested

Carrying out a proper test
The band saw shown above had just passed an LEV test! (Not by us)
Is this system protecting the operator?