LEV Testing Companies
At Clean Air 24 Seven, we are one of the UK’s trusted LEV testing companies, providing comprehensive testing, inspection, and maintenance services.
In every industry where airborne contaminants are produced — from welding and woodworking to car manufacturing, laboratories, and pharmaceutical production, maintaining clean and safe air is essential. Local Exhaust Ventilation (LEV) systems are the first line of defence, capturing harmful substances before they reach workers’ breathing zones.
To ensure these systems remain efficient and compliant with UK regulations, you need the expertise of professional LEV testing companies. Our engineers are BOHS-qualified, holding P601, P602, P603, P604, and W501 certifications, giving you confidence that every test meets the highest occupational hygiene standards.
We are here to help, if you require any advice, simply call 0203 6408 247
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What LEV Testing Companies Do
LEV testing companies are responsible for ensuring that local exhaust ventilation systems are working correctly and safely. Testing is a legal requirement under the Control of Substances Hazardous to Health (COSHH) Regulations 2002.
An effective LEV system removes hazardous airborne contaminants such as:
- Welding fumes and metal particulates
- Wood dust and sawdust
- Paint mist and solvent vapours
- Chemical fumes and powders
- Pharmaceutical dusts and biological agents
LEV testing companies assess whether these contaminants are being adequately captured at the source. During a test, engineers measure airflow, static pressure, and capture efficiency, ensuring the system performs as designed and complies with HSE guidance (HSG258).
Why Choose Professional LEV Testing Companies
Working with qualified LEV testing companies is essential for both safety and compliance. Incorrect or incomplete testing can put workers at risk, invalidate insurance policies, and lead to enforcement action by the Health and Safety Executive (HSE).
Clean Air 24 Seven stands apart from many other LEV testing companies because we combine experience, technical competence, and clear communication. We understand the unique demands of different working environments — from high-precision laboratories to large-scale manufacturing sites — and adapt our testing methods to suit.
Our Credentials:
- BOHS-qualified engineers with P601–P604 and W501 certifications.
- Decades of combined experience in industrial ventilation and air hygiene.
- Detailed, easy-to-understand reports that meet COSHH and HSE standards.
- Transparent pricing and nationwide coverage.
When you work with Clean Air 24 Seven, you’re partnering with one of the UK’s most reliable and competent LEV testing companies.
For a FREE Quote or Any Advice Simply Call 0203 6408 247
What LEV Testing Companies Do
LEV testing companies are responsible for ensuring that local exhaust ventilation systems are working correctly and safely. Testing is a legal requirement under the Control of Substances Hazardous to Health (COSHH) Regulations 2002.
An effective LEV system removes hazardous airborne contaminants such as:
- Welding fumes and metal particulates
- Wood dust and sawdust
- Paint mist and solvent vapours
- Chemical fumes and powders
- Pharmaceutical dusts and biological agents
LEV testing companies assess whether these contaminants are being adequately captured at the source. During a test, engineers measure airflow, static pressure, and capture efficiency, ensuring the system performs as designed and complies with HSE guidance (HSG258).
Why Choose Professional LEV Testing Companies
Working with qualified LEV testing companies is essential for both safety and compliance. Incorrect or incomplete testing can put workers at risk, invalidate insurance policies, and lead to enforcement action by the Health and Safety Executive (HSE).
Clean Air 24 Seven stands apart from many other LEV testing companies because we combine experience, technical competence, and clear communication. We understand the unique demands of different working environments — from high-precision laboratories to large-scale manufacturing sites — and adapt our testing methods to suit.
Our Credentials:
- BOHS-qualified engineers with P601–P604 and W501 certifications.
- Decades of combined experience in industrial ventilation and air hygiene.
- Detailed, easy-to-understand reports that meet COSHH and HSE standards.
- Transparent pricing and nationwide coverage.
When you work with Clean Air 24 Seven, you’re partnering with one of the UK’s most reliable and competent LEV testing companies.
For a FREE Quote or Any Advice Simply Call 0203 6408 247
The LEV Testing Process Explained
While every site and system is unique, most LEV testing companies follow a structured process. Clean Air 24 Seven takes a meticulous, data-driven approach to ensure accuracy and reliability at every step.
Initial AssessmentWe review your LEV system documentation, previous reports, and operational processes. This helps us identify which extraction points, hoods, and duct runs require testing and ensures full compliance with COSHH regulations.
Airflow and Pressure Measurements Using calibrated instruments, our engineers measure:
- Air velocity at capture hoods
- Air volume flow rates in ducts
- Static and differential pressure across filters and fans
These measurements confirm whether the system is maintaining adequate airflow and control efficiency.
Physical and Visual Examination We inspect all parts of the system — from extraction hoods and ductwork to filters and fans — for blockages, corrosion, leaks, or damage.
Performance Comparison Results are compared against design specifications or HSE performance standards to determine whether the LEV system meets the required control levels.
Detailed Reporting and Certification Every client receives a comprehensive report, which includes:
- System identification details
- Airflow and pressure readings
- Visual observations and findings
- Pass/fail outcomes for each capture point
- Recommendations for maintenance or improvements
This report acts as formal evidence of compliance and must be retained for at least five years under COSHH.
We are here to help, if you require any advice, simply call 0203 6408 247
Industries Served by LEV Testing Companies
LEV systems are used in countless industries, each presenting its own challenges. Clean Air 24 Seven works with businesses of all sizes across the UK.
Welding and Fabrication Welding produces metal fumes containing hazardous substances such as manganese, chromium, and nickel. We ensure your LEV system is capturing fumes effectively and keeping your operation COSHH-compliant.
Woodworking and Joinery Wood dust is a known respiratory hazard and potential fire risk. Our engineers test extraction systems to confirm that dust is being safely controlled at saws, sanders, and other machinery.
Automotive Workshops and Car Manufacturing From paint spray booths to exhaust extraction systems, the automotive industry relies on properly functioning LEV. We test and certify systems to protect employees from harmful fumes and particulates.
Laboratories and Chemical Handling Laboratory fume cupboards and extraction systems require precise airflow control. We test, balance, and certify these systems to ensure safe working conditions and compliance with HSE requirements.
Pharmaceutical Manufacturing Air purity is critical in pharmaceutical environments. Our testing confirms that airborne contaminants are effectively captured while maintaining cleanroom integrity.
Clean Air 24 Seven is proud to be one of the few LEV testing companies with expertise spanning all these sectors.
Benefits of Partnering with Clean Air 24 Seven
There are many LEV testing companies operating in the UK, but few offer the same level of expertise, consistency, and customer care as Clean Air 24 Seven.
BOHS-Qualified Engineers All testing is carried out by engineers certified in P601–P604 and W501, ensuring accuracy and compliance.
Comprehensive Testing and Reporting Our reports are clear, detailed, and designed to help you make informed decisions about system performance and maintenance.
Industry-Specific Knowledge We adapt our approach to suit your environment, whether it’s a noisy workshop or a sterile laboratory.
National Coverage and Flexible Scheduling We operate across the UK, minimising disruption to your daily operations with convenient on-site visits.
Full Legal Compliance We help you stay compliant with COSHH regulations, providing complete documentation for audits and inspections.
By choosing Clean Air 24 Seven, you’re selecting one of the most dependable LEV testing companies in the industry.
How Often Should LEV Systems Be Tested?
According to HSE guidance (HSG258), all LEV systems must undergo a Thorough Examination and Test at least once every 14 months. However, depending on your process, testing may be required more frequently:
Leading LEV testing companies, including Clean Air 24 Seven, can help you create a tailored testing schedule that ensures ongoing compliance and safe operation year-round.
Your Trusted Partner in LEV Compliance
Selecting the right LEV testing company isn’t just about meeting a legal requirement — it’s about protecting the health of your workforce and maintaining a safe, efficient working environment.
As one of the UK’s premier LEV testing companies, Clean Air 24 Seven provides reliable, precise, and fully certified LEV testing services for all types of industries and systems. Our commitment to technical excellence and worker safety sets us apart.
LEV Testing Companies FAQs
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What do LEV testing companies do?
LEV testing companies carry out Thorough Examination and Testing (TExT) of local exhaust ventilation systems. Their role is to ensure that the system effectively captures and removes hazardous airborne contaminants such as dust, fumes, vapours, or gases. They measure airflow, pressure, and capture efficiency to confirm that the system complies with HSE and COSHH regulations.
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Why should I use professional LEV testing companies?
Using professional LEV testing companies ensures your ventilation system is tested by competent, qualified engineers who understand both the technical and legal aspects of LEV performance. Trained engineers can identify inefficiencies, verify compliance, and recommend improvements that protect workers’ health and help you meet COSHH obligations.
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How often should LEV systems be tested?
According to HSE guidance (HSG258), LEV systems should be tested at least once every 14 months. However, some processes require more frequent testing:
- Metal dust or fume (e.g. welding): every 6 months
- Wood dust extraction: every 12 months
- Laboratory fume cupboards: every 14 months
- Chemical or pharmaceutical processes: every 6–12 months Reliable LEV testing companies will advise the correct testing schedule for your specific system and environment.
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What qualifications should LEV testing companies have?
Reputable LEV testing companies employ engineers who hold BOHS qualifications, including P601, P602, P603, P604, and W501. These certifications demonstrate expertise in system design, performance evaluation, and hazardous substance measurement — ensuring accurate, compliant testing and reporting.
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What industries need LEV testing companies?
LEV testing companies work across a range of industries, including:
- Welding and metal fabrication
- Woodworking and joinery
- Automotive workshops and car manufacturing
- Laboratories and chemical handling environments
- Pharmaceutical manufacturing
Any business that generates airborne contaminants or hazardous dusts is legally required to test its LEV systems regularly.
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What happens if I don’t use LEV testing companies to inspect my system?
Failing to have your LEV system tested by a competent company can lead to serious consequences, including:
- Non-compliance with COSHH Regulations
- Enforcement action or fines from the Health and Safety Executive (HSE)
- Reduced system performance and increased exposure to hazardous substances
- Health risks for employees, including respiratory illness
Working with certified LEV testing companies such as Clean Air 24 Seven ensures full legal compliance and protects your workforce.
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What should I expect in an LEV testing report?
A professional LEV testing report from reputable LEV testing companies includes:
- Identification of each LEV system and capture point
- Airflow and pressure readings
- Visual inspection notes
- Pass/fail results
- Recommendations for maintenance or remedial work
This report is your proof of compliance and should be kept for at least five years as part of your COSHH records.
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How do I choose the right LEV testing company?
When selecting from the many LEV testing companies available, look for:
- BOHS-qualified engineers (P601–P604, W501)
- Experience in your industry
- Detailed, easy-to-read reports
- Nationwide service coverage
- Positive customer reviews or case studies
Clean Air 24 Seven meets all these criteria, making us one of the UK’s most trusted LEV testing companies.
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Do LEV testing companies also provide maintenance or repairs?
Many LEV testing companies, including Clean Air 24 Seven, also offer system maintenance, filter changes, and performance optimisation. Regular servicing helps ensure your extraction systems continue to operate efficiently between annual tests.
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10. Are LEV testing companies required by law?
While not every company must hire an external contractor, the COSHH Regulations require that LEV systems are tested by a competent person. In practice, most businesses choose professional LEV testing companies because they have the expertise, calibrated equipment, and legal understanding to perform accurate and compliant testing.
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