Check the required interval
HSE guidance says most LEV systems need thorough examination and testing at least every 14 months. Some processes require more frequent testing, so confirm the interval that applies to your system.

LEV testing and certification
Holdsworth provides performance testing and certification for local exhaust ventilation systems, with practical advice when a system needs adjustment, repair or an upgrade.
Thorough examination and testing
LEV systems help control workplace exposure to dust, fume, mist, vapour and other airborne contaminants when designed and used effectively.
A thorough examination and test looks at whether the system can continue to perform as intended. HSE guidance describes a systematic inspection, review of technical performance and assessment of control effectiveness, with the exact checks depending on the system and process.
Read HSE guidance on local exhaust ventilationWhat the service covers
Each installation and process has its own operating conditions and performance requirements.
Holdsworth’s service includes LEV performance testing and certification, plus practical recommendations if the system is not performing as intended.
Useful to know
HSE guidance says most LEV systems need thorough examination and testing at least every 14 months. Some processes require more frequent testing, so confirm the interval that applies to your system.
Previous test reports, commissioning information, drawings and details of the process help the engineer understand how the system is intended to work.
Share any site access, operating or production constraints when arranging a visit so the testing scope can be planned appropriately.
Findings and follow-up
Testing can reveal changes needed to restore or improve performance.
If follow-up work is needed, Holdsworth can advise on adjustments, repairs, remedial work or a larger system upgrade. Its wider capability includes design, in-house ductwork manufacture, installation, maintenance and filters.
Arrange an LEV discussion
Share the process, the system type and the date of its last test. Holdsworth can discuss the appropriate next step with you.
Enquire about LEV testing