LEV Testing and Inspections

What is Local Exhaust Ventilation (LEV) testing?

LEV testing is a thorough inspection and evaluation of a local exhaust ventilation system by a competent person. The aim is to detect significant defects and to remedy them. This assessment compares the system's performance with the specifications in the commissioning report, industry standards, and HSE guidelines. The LEV testing process includes measuring airflow and pressure, as well as verifying the effectiveness of contamination exposure control. Additionally, all components of the system, such as hoods, filters, and ducts, undergo further inspections to ensure optimal functionality and safety. The thorough examination and test is carried out by a person who is competent and able to make an objective assessment of the LEV, such as one of our P601-certified inspection engineers.

LEV testing is crucial for industries where employees are exposed to hazardous substances, such as dust, fumes, and mists. Ensuring the effectiveness of LEV systems (devices designed to reduce employee exposure to contaminants) is not just a matter of regulatory compliance; it's a fundamental aspect of workplace safety. Regular testing, examination, and maintenance of these systems help prevent occupational diseases and maintain safe working conditions. Every LEV system requires statutory ‘thorough examination and testing’ by a competent person.

Local exhaust ventilation system testing is part of a broader strategy to control exposure and protect your employees’ health, making it an essential practice for businesses aiming to adhere to safety regulations and promote a healthier work environment.

Book your LEV testing today to ensure compliance with legal requirements and health and safety standards

How often should LEV testing be done?

Under the HSE’s Control of Substances Hazardous to Health (COSHH) Regulations, it is mandatory for employers to maintain and thoroughly examine LEV systems. These regulations stipulate that all LEV systems must undergo a thorough examination and test at least once every 14 months to ensure they are in good repair and efficient working order. The COSHH Regulation 9 specifically addresses the maintenance, examination, and testing of controls, emphasising the legal requirement to keep records of LEV tests and any repairs for at least five years.

We recommend annual testing so you can benefit from consistency in reporting and a reduced risk of breakdowns. The frequency of LEV testing is critical to ensure continuous protection from exposure to hazardous substances. Certain conditions outlined in HSG258 may need more frequent testing. This includes scenarios where high-risk substances are handled or where the LEV system is critical to the safety of the workplace. The Health and Safety Executive (HSE) provides detailed guidelines for LEV testing in the document HSG258: Controlling airborne contaminants at work: A guide to local exhaust ventilation (LEV). 

By adhering to these regulations and guidelines, your business not only complies with legal requirements but also safeguards your employees' health, ensuring a safer working environment.

Examples of Equipment Requiring LEV Testing

• Dust – wood dust, mechanical cutting dust, abrasive blasting dust.
• Fumes – paint fumes, exhaust fumes, welding fumes, soldering fumes, molten metal fumes.
• Mist – metal working fluid, lubricants, paints, degreasing and stripping fluids.
  
  

Our LEV Test Procedure

Visual Checks

You, as the employer, must ensure that all components of the LEV system, such as hoods, ducts, and filters, are thoroughly inspected for any signs of damage, wear, or improper function. These checks should include an assessment of hoods, slots, canopies, and other parts for any signs of deterioration that could affect performance. Additionally, it's essential to verify the condition of filters and ensure they are operating within the correct pressure ranges, as indicated by built-in gauges.

Air Velocity and Pressure Tests

Air velocity and pressure within the LEV system are critical parameters that need to be measured during testing. These tests help ascertain whether the system is performing to its design specifications. Measurements will be taken at various points, such as behind each hood or enclosure and within the ductwork, to ensure adequate airflow and pressure are maintained throughout the system. 

Particle Count and Filtration Efficiency

The effectiveness of the LEV system in filtering and removing contaminants from the workplace is assessed through particle count and filtration efficiency tests. These tests determine how well the system captures and contains hazardous substances, ensuring that the air quality within the workplace remains within safe limits. It's imperative to check the condition of filters and assess their efficiency in trapping contaminants, ensuring they meet the required health and safety standards.

Why Choose TÜV SÜD for LEV testing and inspections?

• TÜV SÜD are a leading specialist provider of engineering inspections in the UK and Ireland
• Benefit from our network of competent engineer surveyors who have extensive experience with various LEV system testing across industries like engineering, chemical processing, and pharmaceuticals
 • Reduce disruption to your business with our flexible and convenient inspection scheduling
• Direct access to your key inspection reports and documentation via our online inspection portal
• Part of the global TÜV SÜD group providing testing, inspection and certification services since 1866

Meet Your Legal Requirements by Conducting Regular LEV Testing

COSSH compliant LEV testing is a legal requirement for compliance with health and safety standards so contact us to find out how we can help you ensure compliance. LEV test reports often form part of your company's insurance policy. Inadequate testing can result in prosecution, invalidated insurance, and employees becoming seriously ill.

LEV Testing FAQs

How is LEV testing conducted?

The LEV (Local Exhaust Ventilation) testing process includes several key steps. Initially, a visual examination and testing of components such as filters and both internal and external ducting are conducted to confirm they are in optimal condition. Following this, a particle count test is performed to assess the effectiveness of the system in capturing particles.

What are the fundamental principles of LEV systems?

LEV systems are engineered to minimise workers' exposure to airborne contaminants like dust, mist, fumes, vapours, and gases in the workplace. This is achieved by capturing emissions at their source and either safely venting them away or processing them through filters or scrubbers.

What does a thorough examination and test of an LEV involve?

A thorough examination and test of an LEV system is a comprehensive and methodical inspection designed to ensure the system functions as originally intended and continues to provide adequate control over exposure to airborne contaminants. This ensures the system's effectiveness and safety in the workplace.