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Local Exhaust Ventilation (LEV) Testing
Daltons provides comprehensive Local Exhaust Ventilation (LEV) testing to help employers comply with COSHH regulations and maintain safe working environments.
Why is LEV testing required?
Local Exhaust Ventilation systems play a vital role in controlling exposure to hazardous substances such as wood dust, metal fumes and airborne particulates. To remain effective, these systems must be regularly examined and tested.
Under COSHH regulations, employers have a legal duty to ensure LEV systems are maintained in efficient working order and tested at prescribed intervals.
LEV testing helps to:
Demonstrate compliance with COSHH and HSE guidance
Protect employees from harmful airborne contaminants
Confirm extraction systems are operating as designed
Identify deterioration, blockages or performance loss
Reduce long-term health risks such as respiratory illness
Avoid enforcement action, fines or operational disruption
What’s included
Daltons’ LEV testing is conducted in accordance with HSE guidance HSG258 and follows a structured, documented process.
Each test typically includes:
Visual inspection of hoods, ducting, filters and fans
Measurement of airflow rates and capture velocities
Assessment against design criteria and HSE benchmark values
Identification of defects, wear or performance shortfalls
Clear written recommendations where improvement is required
Issue of a comprehensive test report
How often should LEV systems be tested?
COSHH regulations require LEV systems to be thoroughly examined and tested at least once every 14 months. In some higher-risk environments, more frequent testing may be appropriate.
HSE guidance HSG258 sets out the expectations for testing methodology, reporting and record keeping.
HSE guidance:
“Employers must ensure that control measures, including LEV systems, are maintained in an efficient state, in efficient working order, in good repair and in a clean condition.”
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Make An Enquiry
Whether you are approaching your statutory testing deadline or reviewing system performance, Daltons can help you remain compliant and protect your workforce.