How Much Does an LEV Thorough Examination and Test Cost?
If you are the Duty Holder responsible for Local Exhaust Ventilation (LEV) systems, one of the most common questions is:
“How much does an LEV Thorough Examination and Test (TExT) cost?”
But in reality, the better question is:
“What level of technical competency is required to test this system properly?”
A simple welding extraction arm inside a small workshop is vastly different from:
The complexity of the LEV system, the hazardous substances involved, site access requirements and, most importantly the competency of the examiner all influence the final cost.
LEV Testing Is a Specialist Competency
A compliant LEV Thorough Examination and Test requires:
HSG258 specifically states that those involved in LEV design, commissioning, maintenance, and testing must be competent.
What Is a Competent Person for LEV Testing?
Under COSHH Regulation 9 and HSG258 guidance, LEV Thorough Examination and Testing should be undertaken by a competent person.
Competency is typically demonstrated through a combination of:
For complex systems, this may also include specialist competency in areas such as:
At Armstrong Environmental, competency development combines formal BOHS qualifications, structured mentoring, supervised field experience, and internal technical verification through our LEV Control Review methodology.
Why Competency Influences Cost
One of the biggest differences in LEV pricing is the level of expertise of the personnel undertaking the work.
There is a substantial difference between:
The cost of an LEV TExT reflects not only the time on site, but also:
A low-cost inspection may involve little more than basic airflow measurements.
A high-quality LEV TExT involves detailed assessment of whether exposure is genuinely being controlled.
The Importance of BOHS and PSA Registered LEV Specialists
Many clients now specifically seek LEV engineers and consultants listed on recognised competency registers, including the BOHS LEV Specialist Register and registers accredited by the Professional Standards Authority (PSA).
These registers help demonstrate that the examiner has undergone recognised training and competency assessment including:
So – How much will it cost?
The honest answer is: it also depends entirely on the complexity of the systems, the hazards involved, site conditions, and the reporting requirements.
A simple workshop with one extraction arm is very different from a pharmaceutical facility with hundreds of systems, microbiological safety cabinets, confined spaces, or spray booths requiring specialist testing and access equipment.
Under COSHH Regulation 9, employers must ensure that LEV systems are thoroughly examined and tested at least every 14 months (or more frequently for certain high-risk processes). The purpose of the examination is to determine whether the system continues to adequately control exposure to substances hazardous to health.
The cost of an LEV TExT reflects the level of technical work required to achieve this safely and competently.
Other than Competency what Influences the Cost of an LEV TExT?
The single biggest factor is the number of systems on site.
A small engineering workshop may only have:
Whereas large industrial facilities may have:
Generally, the more systems tested during one mobilisation, the lower the average cost per system.
For example:
Site Type | Typical Number of Systems | Typical Complexity |
Small fabrication workshop | 1–10 | Simple |
School or college DT workshop | 5–20 | Simple to moderate |
University laboratory | 20–100+ | Moderate to complex |
Pharmaceutical manufacturing | 50–300+ | Complex |
Aerospace or naval spray facilities | 500+ and Large enclosures | Highly complex |
Large sites often benefit from economies of scale because mobilisation, travel, calibration equipment, and reporting can be spread across many systems.
Not all LEV systems are equal.
Some systems can be examined relatively quickly, while others require extensive technical measurements, airflow balancing, containment assessment, or specialist instrumentation.
Simple Systems
Simple systems typically include:
These systems are generally quicker to inspect and test because airflow paths are straightforward and there are fewer components.
Typical examples include:
Moderate Complexity Systems
Moderate systems may include:
Complex LEV Systems
Complex systems typically include:
These systems require significantly more technical assessment and professional judgement.
Additional considerations may include:
These systems take considerably longer to test correctly.
The substances being controlled heavily influence cost.
Testing systems controlling low-toxicity nuisance dusts is very different from testing systems controlling:
Higher-risk substances require greater scrutiny, additional controls, and sometimes enhanced PPE or respiratory protection (RPE).
HSG258 and COSHH ACOP L5 place significant emphasis on ensuring exposure is adequately controlled where carcinogens and asthmagens are involved.
In some situations, additional air sampling or containment testing may also be recommended.
Access can dramatically affect testing costs.
Many LEV systems include:
If specialist access is required, costs may increase substantially.
Examples include:
Access Requirement | Impact on Cost |
Standard workshop access | Low |
Mobile tower scaffold | Moderate |
MEWP / cherry picker | Moderate to high |
Confined space entry | High |
Cleanroom protocols | High |
Where confined spaces are involved, additional planning, permits, rescue arrangements, gas monitoring, and specialist competency may be required.
Similarly, work at height often requires:
These factors increase both time on site and operational costs.
A compliant LEV TExT is far more than “just taking airflow readings.”
A proper examination follows a structured process involving:
This four-stage LEV Control Review process is outlined within Armstrong Environmental’s operating procedures.
A low-cost “tick-box” inspection may not provide sufficient technical assessment to determine whether workers are genuinely protected.
Report turnaround expectations also influence cost.
Standard Turnaround
Many providers issue reports within:
This is usually sufficient for most routine compliance programmes.
Priority Reporting
Some sites require faster turnaround times.
Urgent reporting often requires:
This may increase project costs.
Critical defects should be reported promptly to the duty holder, especially where systems may not adequately control exposure.
Why Cheap LEV Testing Can Become Expensive
Choosing the cheapest provider can sometimes create significant downstream costs.
Poor-quality examinations may fail to identify:
The consequences can include:
An LEV TExT should ultimately help answer one key question:
“Is the system adequately controlling exposure to substances hazardous to health?”
That requires competent assessment, technical understanding, and professional judgement.
Typical LEV TExT Pricing Structure
Factors usually included within pricing are:
Specialist services such as:
are normally additional services.
What Should Be Included in an LEV TExT Quote?
When comparing providers, check whether the quote includes:
A detailed specification helps ensure both parties understand the scope of work.
LEV TExT Reports May Be Scrutinised During Investigations
LEV Thorough Examination and Test reports are often reviewed following HSE inspections, occupational illness investigations, insurance claims, and internal audits.
The quality of the examination, the competency of the examiner, and the clarity of the professional judgement may therefore become critically important if the adequacy of exposure control is challenged.
Final Thoughts
The cost of an LEV Thorough Examination and Test depends on far more than simply “how many systems” are on site.
The real drivers are:
A small workshop with a few extraction arms may require only a straightforward routine TExT.
By contrast, a pharmaceutical facility, university laboratory, or naval yard with muiltiple complex systems may require extensive technical assessment, specialist instrumentation, high-level access, confined space entry, cloud-based document storage and rapid reporting turnaround.
Ultimately, a good LEV TExT is an investment in:
and should always be undertaken by competent personnel using a structured, technically robust approach in line with HSG258 and COSHH ACOP L5 guidance.
Ultimately, determining whether an LEV system provides adequate control is a matter of competent professional judgement based on the evidence gathered during the examination.
Duty Holders seeking advice on LEV Thorough Examination and Testing, complex LEV systems, or specialist occupational hygiene support can contact Armstrong Environmental’s LEV Specialists for further guidance
