Laboratory Fume Cupboard Testing: The First Line of Defence in Laboratory Safety

Laboratory fume cupboard testing helps protect laboratory users, support COSHH compliance and ensure critical airflow systems continue to perform safely

Laboratory fume cupboard testing gives laboratories a practical way to protect staff, students and researchers from hazardous fumes, vapours and airborne contaminants. In modern laboratories, simply installing a fume cupboard does not go far enough. Laboratory managers need clear evidence that containment systems continue to perform correctly and protect users every day.

Although a fume cupboard may look clean, modern and fully operational, appearance alone does not prove safe performance. Over time, airflow can change, room conditions can vary, alarms can drift, and extraction systems can lose efficiency. Therefore, regular laboratory fume cupboard testing helps verify performance, identify developing issues early and maintain confidence in laboratory safety systems.

What Is Laboratory Fume Cupboard Testing?

Laboratory fume cupboard testing checks whether a fume cupboard captures, contains and extracts hazardous substances effectively from the working environment.

Typically, professional laboratory fume cupboard testing includes:

• Face velocity measurements
• Airflow performance checks
• Sash operation inspections
• Smoke visualisation assessments
• Alarm and monitor verification
• LEV performance validation
• Equipment condition reviews
• Detailed compliance reporting

The Health and Safety Executive explains that employers should maintain control measures in efficient working order and in good repair. It also states that employers should arrange thorough examination and testing of LEV at least every 14 months. As a result, these checks help laboratories confirm that extraction systems continue to provide the expected level of protection.

Why Laboratory Fume Cupboard Testing Matters More Than Ever

Modern laboratories constantly change. Teams introduce new equipment, alter room layouts, update extraction systems and upgrade building ventilation. Consequently, even small changes can affect airflow performance and containment effectiveness.

Regular laboratory fume cupboard testing helps organisations:

• Protect laboratory users
• Support COSHH compliance
• Maintain containment performance
• Identify faults before they become serious issues
• Prepare for audits and inspections
• Reduce costly downtime
• Plan maintenance effectively
• Maintain accurate compliance records

BSI identifies BS EN 14175 as a multi-part fume cupboard standard covering areas such as vocabulary, safety and performance requirements, type test methods and on-site test methods. Therefore, laboratories that refer to recognised standards can take a more structured approach to performance and compliance checks.

The First Line of Defence Against Hazardous Airborne Contaminants

A laboratory fume cupboard often acts as the primary engineering control between the user and hazardous substances. When the cupboard performs correctly, it captures contaminated air at source and removes it from the laboratory before it reaches the breathing zone.

Without effective containment, laboratory users may encounter:

• Solvent vapours
• Acid fumes
• Toxic chemicals
• Fine particulates
• Hazardous by-products
• Airborne contaminants

Therefore, laboratory fume cupboard testing should never become a simple box-ticking exercise. Instead, it should provide a practical assessment of whether a critical safety system continues to work as intended.

Common Problems Identified During Laboratory Fume Cupboard Testing

A visual inspection alone cannot identify many performance issues. In addition, professional testing often reveals problems before they affect laboratory safety, compliance or day-to-day operations.

Reduced airflow performance

Changes in ductwork, fan performance, filters or room ventilation can reduce extraction efficiency and affect containment.

Incorrect sash operation

The sash opening directly influences airflow performance. Therefore, incorrect sash positioning can significantly reduce user protection.

Faulty alarms and monitoring systems

Warning systems alert users to performance issues. However, if alarms do not function correctly, users may continue working without knowing that ventilation performance has dropped.

Cross draughts and room airflow issues

Open doors, windows, supply air grilles and nearby movement can disturb airflow patterns around the fume cupboard.

General wear and tear

Sashes, baffles, seals and internal components naturally deteriorate over time. As a result, laboratories may need repairs, adjustments or replacement parts to maintain safe performance.

Laboratory Fume Cupboard Testing and COSHH Compliance

COSHH requires employers to prevent or adequately control exposure to hazardous substances. Where laboratories use fume cupboards as part of those control measures, organisations need evidence that the systems remain effective.

Regular laboratory fume cupboard testing helps demonstrate that:

• Teams monitor exposure controls
• Engineers maintain safety systems
• Reports record identified faults
• Managers can plan corrective actions
• Laboratory users remain protected

Furthermore, accurate testing records support audits, inspections, insurance assessments and internal health and safety reviews.

Why Airflow Measurements Alone Are Not Enough

Although face velocity often appears as the most visible result on a test report, airflow figures only tell part of the story.

Effective containment depends on several factors, including:

• Room pressure balance
• Make-up air systems
• User behaviour
• Sash opening height
• Laboratory layout
• Nearby equipment and activities

The Fume Cupboard Company quality documentation recognises that airflow remains fundamental to ducted fume cupboard performance. It also highlights that room balance, cross draughts, obstructions, user behaviour and maintenance can all affect performance.

For this reason, competent laboratory fume cupboard testing should consider the wider laboratory environment rather than relying only on a single airflow reading.

The Importance of Competent Testing

Reliable results require suitable instrumentation, recognised test methods and competent personnel. Therefore, laboratories should use engineers who understand airflow performance, containment principles and the practical limitations of each site.

The Fume Cupboard Company quality documentation states that testing activities may include sash operation checks, face velocity measurements, airflow alarm testing and smoke visualisation assessments. It also identifies anemometers and airflow meters as monitoring equipment that may require calibration or verification where measurement accuracy affects conformity.

Consequently, experienced engineers using calibrated or verified equipment can provide results that support sound safety and compliance decisions.

How The Fume Testing Company Can Help

The Fume Testing Company supports laboratories, schools, universities, healthcare environments, pharmaceutical facilities and industrial sites with focused fume cupboard and LEV testing support.

The Fume Testing Company was created to deliver a focused, efficient and modern approach to LEV Thorough Examination and Testing, fume cupboard assessments and local exhaust ventilation compliance. In addition, the service aims to provide clearer reporting and a streamlined experience for laboratory and industrial clients.

By combining specialist engineering knowledge with clear reporting, The Fume Testing Company helps organisations maintain safer working environments, meet statutory requirements and improve long-term compliance performance.

Arrange Laboratory Fume Cupboard Testing with Confidence

Laboratory fume cupboard testing remains one of the most effective ways to protect people, support COSHH compliance and maintain confidence in laboratory safety systems. By identifying airflow issues early, maintaining accurate records and checking extraction performance regularly, organisations can reduce risk and create safer working environments.

If you are unsure whether your fume cupboards are performing as they should, now is the right time to act. Contact The Fume Testing Company to arrange professional laboratory fume cupboard testing, review your current inspection records or plan a tailored testing programme for your facility.

Our experienced engineers can help you confirm airflow performance, identify concerns before they become costly problems and keep your laboratory operating safely, efficiently and with confidence.