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Local Exhaust Ventilation (LEV) systems are essential for controlling airborne contaminants in workplaces where dust, fumes, vapours, or other hazardous substances are present. These systems protect staff, patients, and visitors by extracting contaminants at source and ensuring safe air quality.
Under the Control of Substances Hazardous to Health Regulations (COSHH), employers have a legal duty to ensure that LEV systems are tested at least every 14 months. In some high-risk environments, such as those involving carcinogens or respiratory sensitising agents, testing may be required more frequently.
Failure to maintain effective LEV systems can result in serious health risks, regulatory penalties, and operational disruption. Regular LEV testing ensures that:
At Ventilation Compliance Services Ltd, our LEV testing process is detailed and thorough, ensuring accurate results and comprehensive compliance documentation.
This structured process ensures that organisations can demonstrate compliance while maintaining safe and effective working environments. A typical test involves:
Inspecting the system’s condition, including hoods, ductwork, filters, and fans.
Measuring airflow, pressure, and capture efficiency against design specifications and HSE standards
Confirming performance against COSHH regulations and industry best practice
Providing clear documentation, as required by HSE, with test results, findings, and recommendations
Offering guidance on system use, maintenance, and any remedial works required to maintain compliance
In healthcare environments, LEV systems are often used in laboratories, pharmacies, mortuaries, and decontamination facilities. These systems play a vital role in removing hazardous substances such as chemical vapours, biological contaminants, and pharmaceutical dusts.
Our healthcare LEV testing ensures systems meet HSE standards while supporting wider compliance with healthcare regulations. By carrying out detailed testing, we help healthcare providers maintain safe environments for staff and patients. Testing covers:
Decontamination and sterilisation areas
Cytotoxic drug preparation areas
Mortuary extraction systems
Laboratory fume cupboards
Commercial premises such as workshops, catering facilities, and educational laboratories also rely on LEV systems to manage airborne risks.
Examples include catering extraction systems, small-scale laboratory fume cupboards, and educational workshop extractions.
Our commercial LEV testing service ensures that systems in these environments continue to:
Protect employees and visitors from harmful exposure
Comply with workplace safety standards
Operate efficiently and reliably over time
In industrial facilities, LEV systems are critical to managing airborne hazards produced during manufacturing, welding, woodworking, spraying, and other processes.
Our industrial LEV testing services confirm that systems operate effectively in demanding conditions, protecting employees and ensuring compliance with COSHH.
Industrial testing is essential to protect staff health, maintain compliance, and avoid costly downtime caused by ineffective systems. Testing typically covers:
Chemical and process plant ventilation
Welding and soldering fume extraction
Paint spraying and coating booths
Wood dust extraction systems
Following testing, we provide clients with full documentation and practical advice to support ongoing compliance.
All of our LEV testing services are carried out in line with:
British Standards and Best Practice: Ensuring technical accuracy and compliance
COSHH Regulations: Legal requirements for LEV testing and record keeping
HSE HSG258 Guidance: Controlling airborne contaminants at work