Thorough Examination and Testing of Exhaust Ventilation Systems (TExT)

Every employer who provides extraction equipment to control substances hazardous to health has a legal requirement to examine and test this equipment to comply with Regulation 9 of the COSHH Regulations.

Thorough examination and testing of Exhaust Ventilation Systems ( TExT).

This is a complete and thorough examination of the LEV system from visual to qualitative and quantitative testing  and covers the following in line with COSHH Regulation 9 as detailed in HSE Guide HSG258 “Controlling airborne contaminants at work – a guide to LEV”.

Testing and Examination

Compliance LEV Testing engineers are P601 & P604 qualified and testing is carried out in accordance with the COSHH 2002 regulations and HSG 258. We carry out a full visual examination  (including extraction hoods, ducting, filter units, fans and discharge arrangements to identify any potential defects.  Measurements are taken as appropriate:

  • Hood face velocities and static pressures.
  • Duct velocities and static pressures.
  • Static pressure across filter unit.
  • Static pressure across fan.
  • Discharge stack velocity.

We check the ability of the system to control the hazardous substance using dust lamp tests, smoke tests or light-scattering laser photometer.  If your system meets the key criteria we issue a  ‘satisfactory’  notification in the LEV test report.

Compliance LEV supply a comprehensive report on the LEV system performance along with any recommendation for any action required. For new or previously undocumented systems we will provide a user manual and logbook as part of the Comprehensive package. Where a system is  deemed ‘unsatisfactory’ during testing, Compliance LEV will work with you to establish a cost effective compliant solution.


  • Visual Inspection of the LEV System.

  • Examination of the fan on the system checking condition and rotation.

  • Examination of the duct system and associated dampers, hangers etc.

  • Examination of any filters and the dust collector.

  • Examination of any re-circulating air system and filtration.

  • Testing and logging of system duct velocities.

  • Testing and logging of capture device or hoods velocities.

  • Smoke and dust lamp tests as appropriate by operation for an assessment of the control effectiveness.

  • Examination of site make up air for effective balance between removal and input.

  • Qualitative examination looking at how your LEV utilised in the workplace.

  • Conclusion of control effectiveness inc. recommendation.

  • We look at alterations since first installation or previous testing.

  • We take Photographs of system for the certificate ( With client permission).

  • We will check all air flow gauges and any monitoring equipment.

  • We produce a system certificate.

  • We can create a system logbook if none exists.

If Compliance LEV find any issues or recommendations we will go over these with you while on site and also report them on the certificate and LEV report.

Our aim is to identify anything that needs done for the client to be compliant with legislation and inform them on how best to carry out any improvements.

Contact Us for more information.