LEV Testing and Commissioning

Does your facility need reliable, accurate and independent LEV testing? Total Clean Air delivers accredited testing solutions with quick turnaround times to help you meet regulatory obligations. We are one of the UK’s leading providers of LEV testing and commissioning services, ensuring that you comply with HSG258 standards and maintain appropriate control overexposure to airborne contaminants.

Our experienced laboratory technicians and engineers not only offer a large range of testing and inspection services, but can also validate all your LEV systems. Let us make sure your business is safe, for a free no-obligation survey, call us on 01737 924 700.

What Is LEV?

LEV stands for Local Exhaust Ventilation. It is the fitting of a ventilation system that is designed to remove any contaminated or polluted air from a specific work area. LEVs are used in a wide range of industrial facilities to ensure that workers are not exposed to harmful airborne contaminants. They are particularly effective for removing contaminants at close quarters where a suitable extraction system will not be feasible.

Total Clean Benefits

  • All Work Is Guaranteed
  • Full Manufacturer Warranty
  • ISO Accredited Validation
  • Operational Qualification
  • Performance Qualification
  • References Available

What Is LEV Testing & Commissioning?

LEV Testing

LEV Testing refers to the testing of ventilating equipment, especially hoods and ductwork, for leaks. It is part of building commissioning and ensures the required resistance to hazardous material exposure is achieved.

Local Exhaust Ventilation testing is a way to ensure that all LEV and local vacuum systems provide their intended protection to employees, keeping them safe against potential exposure to hazardous materials. LEV testing typically includes visual inspection of ducts, hoods, filters and associated components for leaks or tears, as well as a solvent or smoke test.

LEV Commissioning

Commissioning is the process of checking that a building system or piece of equipment has been correctly installed and is functioning correctly.

Commissioning is carried out by an independent third party who has specialist knowledge of the design and operation of the system or equipment to be commissioned.

Total Clean Air can assist you in LEV testing and commissioning to help you stay above legalrequirements and achieve your facility’s compliance objectives. For cost-effective solutions, contact us today on 01737 924 700.

Why Do You Need LEV Testing?

To discover any inefficiencies in your equipment

According to the HSE, it is imperative to make sure that all new systems are checked and tested thoroughly prior to them becoming operational. Proper LEV testing and LEV commissioning can ensure that your ventilation systems are working correctly and are keeping everyone safe.

To comply with COSHH law

The Control of Substances Hazardous to Health Regulations 2002 (COSHH) mandates employers to make sure that employees are not exposed to hazardous substances. Where substances are present in the workplace, exposure controls must be installed. These controls can take various forms including methods of containment and local exhaust ventilation (LEV).

To ensure a safe working environment

LEV is an integral part of your workplace safety system that ensures the efficient removal of contaminated air from a hazard area without creating a negative pressure. LEV systems protect both your employees and furnishings from the unpleasant effects of contaminant exposure.

To reduce the risk of long-term health problems

LEV testing can help protect the environment and minimise the risk of adverse health impacts while ensuring efficiency and economical operation, because it prevents dust and gases from rising to the ceiling and spreading throughout your workplace.

What Are COSHH Regulations?

COSHH stands for Control of Substances Hazardous to Health 2002 (COSHH) and is legislation which places the responsibility on employers to protect their employees from exposure to hazardous substances at work.

Any material or substance which poses a significant risk to employee health, will be considered as hazardous and must be controlled as part of your COSHH management system. COSHH requires all employers to:

  • Identify and assess the risks from hazardous substances in the workplace
  • Put in place controls to reduce those risks
  • Provide information, instruction, and training to people likely to be affected by those hazards

What Are the Substances Classified as Hazardous to Health Under COSHH?

A substance is classified as hazardous to health if it falls into one of several categories or classes as detailed in The Control of Substances Hazardous to Health Regulations 2002. These include:

  • Chemicals
  • Products containing chemicals
  • Fumes
  • Dusts
  • Vapours
  • Mists and gases
  • Biological agents

Total Clean Air - Testing & Validation Services

Contact us today and find out how we can best serve you on your next project.

Dangers of not Complying with COSHH Regulations

Compliance with COSHH Regulations is compulsory, and the consequences of non-compliance can be severe:

Employees may become ill

Failure to control exposure to hazardous substances in the workplaces can result in individuals suffering from illnesses, such as cancer and asbestosis as well as materials degradation, or even death.

Legal sanctions

You could face legal sanctions if you fail a COSHH inspection. The HSE has the power to prosecute offences.

Hefty fines

If you fail to comply with COSHH, the authorities can impose fines up to £20,000. Inspections are typically announced so it is unlikely your business will be visited suddenly.


Failure to comply with COSHH regulations, especially in relation to the local exhaust ventilation (LEV) testing leading to the deterioration and deterioration of employee’s health can cause the offending business to be prosecuted.

Business closures

Not complying with COSHH regulations can result in your company being shut down by health and safety authorities or having your license revoked.


If total violation of the COSHH regulations is discovered, it may result in a prison sentence of up to two years. Total Clean Air can help you avoid future problems and associated lawsuits by making sure your equipment is safely working properly now.

How Can Total Clean Air Help You Comply with COSHH Regulations?

LEV Testing & Validation Services

Total Clean Air specialises in the testing, validation, and commissioning of Local Exhaust Ventilation systems. Our experts can provide advice on the requirements of your test and your specific circumstances. With more than XXX years’ experience, Total Clean Air has worked with clients across the UK from London to Belfast. Our experienced team delivers innovative solutions to enable businesses to operate safely in compliance with regulations whilst reducing costs for our clients. Call us today on 01737 924 700.

Air Quality Testing

Total Clean Air is the nation’s premier provider of LEV testing and commissioning. We offer a range of services for regulated pollutants that include aerosols, asbestos, crystalline silica, formaldehyde, hydrocarbons, lead, molds/fungi, polycyclic aromatic hydrocarbons, radon, and dust. Contact us today on 01737 924 700 to learn more about how we can help get your facility into compliance as fast and efficiently as possible.

Preliminary Checks/Qualification

Preliminary checks are carried out as a matter of course to ensure that the equipment will not be damaged and that all aspects of the installation are as they should be.

After these checks, our engineer can issue a qualification report in accordance with HSE guidelines HSG258. By issuing this certification Total Clean Air ensures the client has their equipment fully commissioned ready for use.

We have excellent project management skills which means we can deliver client projects on time and on budget. If you need to get started with any type of LEV testing, then talk to us about how we can help you. Call 01737 924 700.

Filter Maintenance & Testing

Get the most out of your air filters again with expert filter maintenance and testing from Total Clean Air. Our filter maintenance and testing services promote efficiency, safety and longevity of equipment whilst ensuring that safety standards are always maintained.

With our filter testing and maintenance service, our team of experts help to maintain optimal performance in your LEV system, protect the environment while extending system life, and assure safety and compliance.

Our filter testing, cleaning and maintenance services are designed to take all the worry out of ensuring your system is always running at its peak. Call our team on 01737 924 700 today to schedule a regular filter maintenance to optimise the performance of your system.

Periodic Testing for Leaks

LEV systems need to be tested regularly to make sure they are complying with the COSHH standard and your organisational health and safety policies. A periodic test for leaks will help ensure that your exhaust system does not pose an ergonomic hazard to any exposed employees. Total Clean Air specialises in both systematic testing and visual inspection methods to ensure that ductwork is not allowing contaminants into the breathing zone of workers.

With high accuracy and total flexibility, Total Clean Air services have been proven successful in the most demanding of environments around the UK. Our vapour detection equipment can detect and locate the exact point where a leak has occurred to allow for easy repair on site if needed. Call Total Clean Air today on 01737 924 700 to see how we can help you achieve compliance.

On-site Dispersed Oil Particulate (DOP) Testing and Validation of HEPA Filters

Good air filtration is the foundation of a healthy workplace environment. Total Clean Air can perform DOP testing on your High Efficiency Particulate Air (HEPA) filter to validate its performance. The testing provides detailed test reports specific to each site, along with recommendations to improve overall filtration efficiency, resulting in better compliance with any regulatory controls. Contact us today at 01737 924 700 to test and validate your systems.

Preparing Design Specifications for New Filter Systems

Filtration is a highly effective way to protect workers and other occupants from the risk of inhalation or ingestion of harmful airborne contaminants. In some instances, however, the design specification for a new air-filtering system may not be sufficient to adequately limit employee exposures, particularly if such a system is intended for use in an environment where airborne chemical hazards are present.

We offer our customers a dedicated service which starts with proven design specifications for new filter systems, continued by independent verification. The system is designed to ensure that you have minimal downtime and are compliant with all regulations in place in your sector. Get in touch to request more information. Please call 01737 924 700.

Supply and Installation of New HEPA filters

Total Clean Air is proud to supply and install quality, high-performance European-designed HEPA filters at an affordable price with a XXX years warranty.

Our workforce are trained in the installation of HEPA filters, and we tirelessly inspect each filter for quality assurance before they leave our factory.

We know that a well-maintained mechanical system is crucial to your business being able to function at full capability, which is why we work with only the highest quality brands on the market.

We have been serving businesses in the UK since year XXX, and in that time have established great relationships with many clients as a ‘go-to’ company for HEPA filters supply and installation. If you need a new filter installed or simply need some advice, please call us on 01737 924 700.

Total Clean Air - Testing & Validation Services

Contact us today and find out how we can best serve you on your next project.

Integrity Testing

LEV ventilation systems must be tested and certified annually by a Technically Competent Person (TCP) in accordance with HSE guidelines to ensure that they are in good operating condition.

We specialise in providing clients with instant, on-site audits of their buildings’ ventilation systems. Our experienced and impartial team offers highly practical advice on how best to maintain the health and welfare of your employees and customers. Speak to our expert team on 01737 924 700 today.

How Are LEV Systems Tested and Validated?

The following test methods can be used to test and validate LEV systems:

  • System airflow measurement using an anemometer (results are expressed at standard air conditions)
  • System tests using a smoke generator
  • Detection of hazardous atmospheres using a portable gas chromatography
  • Detection of minimal airborne concentrations using a diffusion sampler
  • Detection of hazardous atmospheres by gas sampling or by visual observations

How Do I Get my LEV System Tested?

To get your LEV system tested, simply contact an accredited testing facility that is capable of LEV tests such as Total Clean Air.

We will carry out a visual assessment of your LEV System to ensure compliance with regulatory control requirements. There is a whole range of individual tests on key elements such as the design, operation and performance.

Tests may include:

  • Exhaust system – this will usually be through vacuum/pressure testing using flow measurement at different operating conditions
  • Fan or blower – Should be frequency controlled
  • Airflow measurement at various positions within the hazard zone
  • Temperature measurement which may include thermocouples
  • Duct leakage

Our technicians will be able to offer advice on how the testing was carried out, and if your system follows current legislation.

Get in touch with Total Clean Air to get started.

Why Choose Total Clean Air?

We Provide Expert Advice

Total Clean Air will provide you with expert advice on air pollution control, any environmental compliance issues, and all types of energy efficiency helpful with your project. We pride ourselves in working closely with you to ensure that you get the best solution for your needs.

Prompt and Reliable Service

With a team of highly qualified engineers and technicians on hand, Total Clean Air can be on-site within hours – so if you need us, we are there for you. With an extensive fleet of specialist vehicles, Total Clean Air offers a fast and efficient service that is flexible to your needs. You can always expect a friendly and helpful response from a team that is passionate about what they do.

Nationwide Coverage

We provide complete LEV Testing and Commissioning services to the UK. From our base in Surrey, we operate throughout the country and can carry out small-scale projects up to entire site installations. Our team has a wealth of experience and is fully qualified to provide a consultative service ensuring your project is delivered on time and within budget.

Minimal Disruption

As a specialist in LEV Testing and Commissioning, we provide a complete solution with minimal disruption to your works. This means no loss of you experience minimal downtime until we complete our work and leave you with a clean bill of health.

Unmatched Industry Experience

We have over XXX years of experience within the cleaning industry, specialising in providing fully engineered ventilation solutions designed to improve occupational health and safety and reduce costs. Our experience enables us to offer a complete service from design, manufacturing, and installation through to service and maintenance.

Custom or Standard Solutions

Total Clean Air provides a fit for purpose solution to safety, quality, and performance needs. From sampling and monitoring to prediction modelling, we provide a total air quality solution. You have the choice from a number of different testing systems. All our testing meets national standards and local application requirements. All results are reliable, robust, and credible.

Comprehensive Testing & Report

We undertake a comprehensive analysis of your business. We then discuss our findings with you whilst providing you with advice and recommendations on the best solution to suit your needs. During this process we consider how effective your current system is, identifying areas for improvement. All reports are written up by us in a clear, easily understood format so that you can understand the precise issues and problems with your existing system as well as potential options for improvement.

Total Clean Air - Testing & Validation Services

Contact us today and find out how we can best serve you on your next project.

Contact us for Expert Analysis and Practical Recommendations

Do you have questions about LEV systems? Whether you are a contractor, or building owner or just want to learn more about LEV systems for the workplace and your business premises in general?

Total Clean Air can help you with any LEV testing and commissioning advice, guidance, or related queries that you may have.

Contact us and we will review your scenario, then determine the best approach for your project. Please call 01737 924 700.


Is LEV testing a legal requirement?

LEV testing and commissioning is a legally required procedure designed to ensure that machinery safely disperses contaminants at the right rate, through the correct system. The Control of Substances Hazardous to Health Regulations 2002 (COSHH) requires employers to assess the risks from hazardous substances in the work environment and to minimize or eliminate these risks, as far as is reasonably practicable.

How often should LEV be tested?

It is essential that LEV units, like all process plant equipment, are regularly examined and maintained. The frequency of examination depends on the level of risk posed by the hazardous process and its associated environment. The employer must assess the nature and extent of risk to determine how often to carry out inspections, tests, and commissioning. Whilst there is no statutory guidance on how frequently LEV should be examined, it is recommended to give your LEV a thorough inspection at least every 6 months, as within this time, dust, dirt and other contaminants in the air may have built up in your equipment and reduce efficiency. If your business uses particularly hazardous substances it is advisable to clean your system more frequently.

When should LEV be used?

A local exhaust ventilation system (LEV) should be used to remove contaminated air from all processes when there is a potential for airborne contamination. LEV can also be used to comply with controls for substances that have no threshold values such as volatile organic compounds (VOCs).

Who should I get to complete my LEV tests?

If you need your LEV systems tested, then you should get a competent person or team to complete your LEV tests. A competent person is an individual who can recognise the dangers of working with hazardous materials and implement controls to ensure safety measures. Total Clean Air has many years of experience in testing and commissioning many LEV Systems. Our staff are competent persons for LEV testing and commissioning in the UK.

What are my responsibilities as a business owner?

The law requires you to make sure your workplaces are safe. This includes making sure that any effects of airborne contaminants on workers are limited. You must: use a competent person to assess the risk from hazards; produce a suitable written assessment detailing how risks have been controlled; carry out regular checks to make sure controls continue to work as planned.

What should be contained in the LEV examination report?

The LEV Examination Report needs to demonstrate that the results of the inspection meet the expected standards. The main purpose of this document is to provide sufficient evidence to support management decisions relating to HSG258 and COSHH regulations.

Total Clean Air - Testing & Validation Services

Contact us today and find out how we can best serve you on your next project.

Phillip Godden

Phillip Godden is the Founder & Chief/Executive Officer at Total Clean Air.

Working Hours

  • Monday 08:00 - 19:30
  • Tuesday 08:00 - 19:30
  • Wednesday 08:00 - 19:30
  • Thursday 08:00 - 19:30
  • Friday 08:00 - 19:30