Local Exhaust Ventilation (LEV) Testing & Inspection

An air quality survey is a structured assessment of ventilation systems, airflow, and airborne contaminants within a building. It helps determine whether systems are operating correctly, meeting hygiene standards, and complying with relevant health and safety legislation.

Air quality surveys are recommended following changes to building use, refurbishments, complaints from occupants, inspection findings, or as part of routine compliance management. They are also valuable when validating system performance or investigating indoor air quality concerns.

Air quality surveys can include TR19 dust surveys, emissions surveys, airflow balance surveys, and airflow leakage surveys. Each survey type focuses on different aspects of system performance, hygiene, and regulatory compliance.

A TR19 dust survey assesses the cleanliness and condition of ventilation ductwork in line with industry best practice. It identifies dust accumulation, contamination levels, and hygiene risks that may impact air quality and system efficiency.

An airflow balance survey measures and adjusts air volumes within ventilation systems to ensure correct distribution. Balanced airflow supports occupant comfort, system efficiency, and compliance with workplace ventilation requirements.

An airflow leakage survey identifies air losses within ductwork systems. Excessive leakage can reduce system effectiveness, increase energy consumption, and compromise indoor air quality.

LEV testing evaluates systems designed to capture airborne contaminants such as dust, fumes, vapours, or mist at source. Testing ensures the system is performing as intended and continues to protect workers' health.

Under COSHH regulations, LEV systems must undergo a thorough examination and test at least every 14 months. Certain high-risk processes may require more frequent inspections.

LEV inspection includes visual checks of components such as hoods, ductwork, filters, and fans, performance testing using airflow and pressure measurements, and qualitative assessments such as smoke testing to confirm effective capture.

LEV testing is carried out in line with HSG 54 guidance issued by the Health and Safety Executive. This ensures systems meet COSHH requirements and continue to provide effective control of hazardous substances.

Yes. Detailed reports are provided following air surveys and LEV inspections, including findings, test results, photographic evidence, and clear recommendations. These reports support statutory compliance and HSE inspections.

Any non-compliances are clearly highlighted, prioritised, and supported with practical recommendations. This allows duty holders to take timely corrective action and maintain safe working environments.

Commercial indoor air quality testing services are commonly used by offices, healthcare facilities, education providers, industrial sites, local authorities, and property managers responsible for occupied buildings.

Specialist providers bring regulatory knowledge, technical expertise, and practical experience across a range of environments. This ensures air quality testing and advice are accurate, proportionate, and aligned with current legislation.

Vectair Environmental combines specialist guidance, regulatory insight, and practical experience with air quality testing services tailored to commercial environments. This approach supports healthier workplaces, regulatory compliance, and informed decision-making.