Local Exhaust Ventilation (LEV) systems are often installed with good intentions. However, keeping them effective over time is where the real challenge lies.
Now we’re in 2026, there is a lot of conversation happening around workplace safety and making environments cleaner and safer as we move into the future. As per HSE, around 1.9 million workers/employees suffer from work-related ill health and over 11,000 people die from lung related diseaes due to past occupational exposures.
This data further solidifies the importance of creating safe places to work. While there is no single new regulation landing overnight, the expectations are changing. From regulators, from insurers, and increasingly from internal audits. LEV systems that have been left to tick along on annual tests alone are starting to attract closer scrutiny.
This is particularly relevant for any site relying on historical design assumptions or legacy equipment. On paper, many systems still appear compliant. On-site, performance often tells a different story.
LEV System Inspection: What Compliance Still Means in Practice
The legal framework has not shifted dramatically. COSHH remains the driver, and HSG258 continues to set the benchmark for examination and testing. Statutory thorough examination at least every 14 months is still the minimum requirement.
Where issues arise is how these duties are interpreted and applied.
An LEV system inspection is not just a test of airflow on the day. It is an assessment of whether the system remains suitable for the process, the exposure risk, and the way the work is actually being carried out.
In practice, this is where issues usually arise. Processes change. Materials change. Operators adapt habits. The LEV stays the same.
At Vent-Tech, we ensure your LEV is not just performing at its optimal, but is also compliant and advances with newer technologies and systems in your workplace.
Increased Focus on Suitability, Not Just Condition
One of the common misunderstandings is assuming that a system which passes its statutory examination is automatically fit for purpose. That is not always the case.
The examination under HSG258 confirms whether the system is operating as designed and whether it is in a safe condition. It does not confirm that the original design is still appropriate for current use.
For 2026, enforcement attention is shifting towards this gap. Inspectors are asking questions such as:
- Is the system still controlling exposure adequately?
- Has the process changed since installation or commissioning?
- Are capture velocities still appropriate for the contaminant generated?
- Are operators actually using the system as intended?
This approach is usually sufficient in newer facilities, but not always in older sites with layered modifications.
Design Intent Versus Real Use
Commissioning data often sits in a file, untouched for years. It is treated as a historical record rather than a working reference.
While this sounds very straightforward, on-site challenges and reality are usually different.
Drifted hood positions, altered ductwork, and removed enclosures are some of the challenges that arise. This data, unfortunately, is also missed in the annual reports unless the examiner is given the context and history of the layout.
A meaningful LEV system inspection ahead of 2026 should include a comparison between:
- Original design intent
- Current process layout
- Actual operator behaviour
This is often overlooked during initial assessments, especially where testing is treated as a standalone service rather than part of a wider control strategy.
Documentation Is Under Closer Review
Documentation has always played a key role in LEV inspection. What is changing, or rather evolving, is how closely it is being reviewed.
Common documentation issues include:
- Outdated system descriptions
- Missing or unclear performance criteria
- Examination reports filed without follow-up actions
- Training records that do not reflect actual operator understanding
Local exhaust ventilation regulations require that controls be maintained, examined, and used correctly. Documentation should demonstrate this chain clearly.
If it does not, compliance becomes difficult to defend.
Testing Intervals: The 14-month Checkmark
There is still a belief in some sectors that testing every 14 months is enough. That interval is a legal maximum, not a recommendation.
For higher-risk processes, more frequent checks are often necessary. This includes welding, woodworking, pharmaceutical handling, and any activity producing respirable dust or fume.
In practice, reliance on the statutory interval alone can mask gradual performance decline.
A sensible approach often includes interim checks focused on:
- Airflow trends
- Filter condition
- Visual capture effectiveness
- Obvious damage or modifications
These checks do not replace statutory examinations. They support them.
Training Is No Longer a Soft Requirement
Operator training is receiving more attention, particularly where LEV performance depends heavily on correct use.
This includes:
- Correct positioning of hoods
- Understanding of system limitations
- Recognition of poor capture
- Reporting of faults or changes
Training records that simply state attendance are increasingly seen as weak. What matters is whether operators understand why the system is there and how misuse affects exposure control.
Ageing Systems and End-of-life Considerations
Many LEV systems currently in use were installed over a decade ago. Some are older. While age alone is not a reason for replacement, performance drift is real.
Common issues seen during inspections include:
- Fans operating outside their efficient range
- Obsolete components with limited spares
- Ductwork designs that no longer suit the process
- Controls that do not reflect modern risk expectations
This approach is usually sufficient when systems are well-maintained. It becomes less reliable when maintenance has been reactive rather than planned.
Preparing for 2026 should include an honest review of whether continued patching remains appropriate or whether redesign is the safer long-term option.
What Preparation for LEV Looks Like
For most sites, preparing for 2026 does not mean wholesale replacement. It means tightening control around what already exists.
Practical steps often include:
- Reviewing risk assessments against current LEV performance
- Checking that examination reports reference real process conditions
- Identifying systems that rely heavily on correct operator positioning
- Confirming that performance criteria are still valid
- Addressing recurring advisory comments, not just failures
In practice, this is where issues usually arise. Advisory notes are repeated year after year, quietly accepted.
LEV compliance is not about passing a test. It is about controlling exposure, day in and day out. As expectations tighten, the gap between paper compliance and real-world performance becomes more visible. Systems that are understood, reviewed, and maintained tend to hold up well.
Ultimately, compliance is not about paperwork. It is about knowing your system is actually doing what it is supposed to do.
If you are preparing for 2026 and need confidence that your LEV system is compliant, effective, and fit for current use, Vent-Tech can help.