Downdraught Bench – LEV Thorough Examinations

Downdraught Bench’s Within Industry

Downdraught bench Local Exhaust Ventilation (LEV) systems are a form of source-capture ventilation designed to control dusts, fumes, and vapours generated during bench-based work processes. They are commonly used in manufacturing, laboratories, workshops, and educational environments for activities such as grinding, sanding, polishing, weighing powders, mixing chemicals, and light fabrication tasks where contaminants are released close to the work surface.

The key feature of a downdraught bench is that air is drawn downward through the work surface, pulling contaminants away from the operator’s breathing zone and into the extraction system. This airflow pattern is particularly effective for controlling heavier particles and dusts that naturally fall under gravity, while also reducing the spread of contaminants across the workroom. The effectiveness of the system depends on uniform airflow across the bench surface and sufficient extraction volume to overcome cross-drafts and operator movement.

Downdraught benches typically incorporate perforated work surfaces, internal plenums, ductwork, and extract fans, often combined with filtration units to capture dust before air is discharged. Filters must be appropriate for the materials being handled and regularly maintained to prevent blockages that can reduce airflow. Poor maintenance or damaged work surfaces can significantly compromise capture efficiency without being immediately obvious.

Under the Control of Substances Hazardous to Health (COSHH) Regulations 2002, downdraught bench LEV systems must be properly maintained and thoroughly examined and tested at least every 14 months by a competent person. The statutory examination verifies airflow performance, capture effectiveness across the bench, mechanical condition, and ongoing suitability for the tasks being carried out.

When correctly designed, positioned, and maintained, downdraught bench LEV systems provide effective control of hazardous substances at source. They help protect worker health, maintain a cleaner working environment, and ensure compliance with COSHH requirements, making them an important control measure for a wide range of bench-based operations.

What’s covered during your SEIS Thorough Examination.

Here’s a detailed breakdown of what is covered during an inspection and testing of a Downdraught Bench, in accordance with COSHH2002 Regulation 9 . The purpose is to ensure the system is safe, serviceable, and fit for purpose. Below is an in depth description of how your equipment is thoroughly examined;

LEV Inspection Procedure

A COSHH 2002 LEV inspection of a downdraught bench—formally known as a thorough examination and test of the LEV system—is carried out to confirm that the bench continues to effectively capture and remove hazardous substances at source. Because these systems rely on consistent airflow across the work surface, performance testing is essential to ensure ongoing protection.

Below is a clear overview of what is covered during a statutory LEV inspection of a downdraught bench;

Airflow Performance Across the Work Surface

The inspection focuses on whether the downdraught bench provides adequate and uniform airflow across the perforated work surface. This includes:

  • Measuring air velocities at multiple points across the bench

  • Identifying areas of reduced extraction or dead spots

  • Assessing whether airflow is sufficient to capture contaminants generated by the task

Uneven airflow can allow dusts or fumes to escape into the operator’s breathing zone.

Capture Effectiveness and Work Practice

Beyond airflow measurements, the inspection considers practical capture effectiveness, including:

  • Whether contaminants are drawn downward as intended

  • The effect of operator position and hand movements

  • Influence of cross-draughts from doors, fans, or adjacent processes

The system is assessed in relation to how the bench is actually used, not just how it performs under ideal conditions.

Condition of the Bench Surface and Plenum

The competent person will examine the physical condition of the bench, including:

  • Perforated work surface condition and cleanliness

  • Blockages caused by debris or accumulated dust

  • Internal plenum condition (where accessible)

  • Structural damage or air leakage

Blocked perforations or damaged surfaces can severely reduce performance.

Ductwork, Fans, and Mechanical Integrity

The inspection includes checks of the mechanical components supporting airflow, such as:

  • Ductwork condition, leakage, or corrosion

  • Joints, seals, and access panels

  • Extract fan condition, speed, and operation

  • Vibration, noise, or signs of wear

Mechanical defects are recorded where they could affect airflow or reliability.

Filtration and Dust Collection (Where Fitted)

Where the system includes filtration or dust collection units, the inspection covers:

  • Filter type and suitability for the substances handled

  • Filter condition and loading

  • Evidence of bypass or leakage

  • Safe dust collection and disposal arrangements

Poor filtration can reduce airflow and increase exposure risk.

Controls, Indicators, and Safety Features

The inspector will verify that system controls are functioning correctly, including:

  • On/off controls and interlocks (where fitted)

  • Airflow indicators, pressure gauges, or warning devices

  • Labelling and system identification

These features help operators recognise reduced performance or failure.

Suitability for Current Processes

The inspection considers whether the downdraught bench remains suitable for:

  • The substances being handled

  • The quantities generated

  • Any changes to processes since the last examination

Process changes are a common cause of LEV systems becoming ineffective over time.

Statutory Reporting and Documentation

Finally, a written report of thorough examination and test is produced, detailing:

  • Test methods and results

  • Identified defects or performance issues

  • Clear conclusions on system effectiveness

  • Required remedial actions and timescales

This report is a legal requirement under COSHH and must be retained for inspection.

 

 Summary

An LEV Thorough Examination ensures that the system is safe, compliant, and fit for use. It helps prevent accidents and work place illnesses caused by poorly maintained, or poorly operating systems. While it does not replace regular maintenance, PUWER and LEV (COSHH2002) inspections are a crucial legal requirement for keeping your working operations safe and avoiding costly breakdowns or incidents.

Why Downdraught Bench Thorough Examinations Matter For You & Your Business. 

Why COSHH2002 Thorough Examinations Of LEV Systems Matter

COSHH2002 LEV thorough examinations are a legal requirement in the UK for all Local Exhaust Ventilation equipment used at work, and for good reason. These inspections ensure that LEV equipment, such as fume cupboard, receiving hoods, spray booths, and captor hoods are safe to use, and fit for purpose. The environments of LEV equipment is required means that equipment failure can lead to catastrophic consequences, including serious injury, respiratory issues, work place illness and in the long term, fatalities. By carrying out regular, scheduled thorough examinations by a competent person, businesses can identify wear and tear, structural damage of ducting, or faulty mechanisms before they result in an incident.

Pros of Getting an LEV Thorough Examination in line with COSHH2002

Legal Compliance and Risk Reduction: The most obvious advantage is staying compliant with health and safety law. Compliance avoids potential legal action, fines, or even prosecution. More importantly, it drastically reduces the risk of workplace accidents caused by lifting equipment failure.

Improved Safety Culture: Regular inspections foster a proactive safety culture within the organisation. Employees are more likely to trust equipment and feel safe in their work environment when they know thorough checks are in place.

 Extended Equipment Lifespan: Regularly maintained and inspected equipment typically lasts longer. Examinations can identify early signs of damage or fatigue, allowing for preventative maintenance that avoids costly replacements or repairs.

 Insurance and Liability Protection: Insurers may require evidence of LOLER compliance in the event of an incident. Without valid inspection records, insurance claims could be denied or reduced, leaving the business liable for damages.

 Operational Efficiency: Detecting potential issues before they lead to equipment failure helps prevent unscheduled downtime. This keeps operations running smoothly and avoids the knock-on effects of delayed projects or interrupted workflows.

Cons of Failing to Carry Out COSHH2002 LEV Thorough Examinations

 Legal and Financial Consequences: Failing to comply with COSHH2002 can result in enforcement action from the Health and Safety Executive (HSE), including improvement notices, prohibition notices, fines, or even prosecution. Legal battles and associated costs can be financially crippling.

 Increased Risk of Accidents: Equipment that hasn’t been thoroughly examined is far more likely to fail. Such failures can lead to injuries or fatalities, particularly in high-risk environments like construction or manufacturing. Beyond the human cost, the reputational damage to a business can be severe and long-lasting.

 Higher Repair and Replacement Costs: Neglecting inspections can allow minor issues to develop into major faults. These may require costly emergency repairs or complete equipment replacement, expenses that could have been avoided through routine examinations.

 Loss of Business and Clients: Clients often expect their contractors or suppliers to uphold strict safety standards. A failure to meet legal obligations like COSHH2002 can result in lost contracts or blacklisting from future work, especially in regulated industries.

 Increased Insurance Premiums or Invalidated Coverage: As mentioned, insurers may increase premiums or deny coverage entirely if a business can't provide evidence of up-to-date COSHH2002 compliance, placing a heavier financial burden on operations.

LEV thorough examinations aren’t just a box-ticking exercise - they are an essential component of a responsible, safety-first approach to using lifting equipment. The benefits of compliance are wide-ranging, from protecting human life to reducing costs and maintaining operational integrity. Conversely, the risks of neglecting these inspections can be devastating on multiple levels.

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