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How Local Exhaust Ventilation Protects Workers from Hazardous Substances


At Air Improve, nestled in the historic cities of Winchester and Plymouth, we’re committed to enhancing indoor air quality in workplaces across the UK. As experts in air conditioning and ventilation systems, we understand the critical role of Local Exhaust Ventilation (LEV) in safeguarding workers from hazardous substances. This comprehensive guide delves into LEV systems’ mechanisms, benefits, and importance in diverse work environments.

1. What is Local Exhaust Ventilation (LEV)?

Local Exhaust Ventilation systems are engineered solutions designed to reduce exposure to airborne contaminants in the workplace. These systems capture dust, fumes, vapours, and gases at their source, preventing them from entering the worker’s breathing zone.

2. The Science and Mechanics Behind LEV Systems

LEV systems operate by creating a directional air flow. This flow is designed to capture contaminants effectively before they disperse into the air. Key components of LEV systems include hoods, ducting, air cleaners, and fans. The design of each component plays a vital role in the system’s overall efficiency.

3. The Importance of LEV in Occupational Health and Safety

Prolonged exposure to hazardous substances can lead to serious health issues, including occupational asthma, lung cancer, and chronic obstructive pulmonary disease (COPD). LEV systems are a primary line of defense, helping to maintain safe working conditions and safeguard worker health.

4. Types of LEV Systems and Their Applications

Different industries require specific types of LEV systems. For example, in woodworking, dust extraction systems are essential. In chemical laboratories, fume cupboards are used to handle volatile chemicals. Each system is designed to meet the unique challenges of various hazardous substances.

5. Custom LEV Solutions by Air Improve

At Air Improve, we pride ourselves on providing bespoke LEV solutions. Our process involves a detailed assessment of your workplace’s specific needs, considering factors like the type of work, the substances used, and the layout of the facility.

6. Legal Compliance and the Role of LEV

In the UK, the Health and Safety Executive (HSE) sets stringent guidelines for workplace safety, including the Control of Substances Hazardous to Health (COSHH) Regulations. An effective LEV system is not just a compliance requirement but a crucial aspect of fulfilling an employer’s duty of care.

7. Maintenance, Testing, and Servicing of LEV Systems

Regular maintenance and testing are essential for the effective operation of LEV systems. Air Improve provides comprehensive servicing, including performance checks, filter replacements, and COSHH assessments, to ensure your system meets legal standards and operates at peak efficiency.

8. Case Studies and Success Stories

This section would feature detailed case studies showcasing how Air Improve’s LEV systems have transformed the safety and air quality in various settings, such as manufacturing facilities, educational institutions, and commercial offices.

9. The Future of Air Quality and Ventilation Technology

Looking ahead, the field of air quality and ventilation is evolving rapidly. Innovations like smart LEV systems, which can adapt to changing environments and usage patterns, are on the horizon. Air Improve is committed to staying at the cutting edge of these developments.


Implementing a robust LEV system is crucial for any workplace handling hazardous substances. Air Improve is dedicated to delivering custom, effective ventilation solutions that not only comply with legal standards but also foster a safe and healthy working environment. Connect with Air Improve for a consultation on how our bespoke LEV solutions can enhance your workplace’s safety and air quality.