Every day, thousands of workers across the UK and Ireland breathe in dust, fumes, and vapours that can slowly harm their health. In industries like manufacturing, engineering, and woodworking, these risks are unavoidable. Thus, having a proper exhaust ventilation system is crucial.
That’s where local exhaust ventilation (LEV) comes in. A good LEV system captures harmful substances right at the source, helping to keep your air clean and your team safe.
But as DevineAir often reminds employers, having an LEV system in place isn’t enough. It must be properly tested, maintained, and compliant with the law. Neglecting this not only risks your employees’ health but also exposes your business to serious legal and financial consequences.
This guide explains what local exhaust ventilation regulations require, how they differ between the UK and Ireland, and what steps you can take to stay compliant and confident that your system is doing its job.
Poor air quality at work can lead to serious health problems, including respiratory issues and long-term conditions such as asthma or occupational lung disease.
In the UK, the Health and Safety Executive (HSE) estimates thousands of people die each year due to exposure to workplace dust and fumes. In Ireland, the Health and Safety Authority (HSA) also reports a rise in work-related respiratory illnesses.
The goal of local exhaust ventilation regulations is to prevent this harm by ensuring employers properly control hazardous substances and keep exposure as low as reasonably practicable.
The UK and Ireland have clear laws that set out what employers must do to protect their workers from harmful airborne substances.
Let’s look at what those regulations actually mean in practice.
United Kingdom: COSHH Regulations 2002
In the UK, the key legislation governing LEV systems is the Control of Substances Hazardous to Health (COSHH) Regulations 2002. These regulations apply to almost every workplace, from factories and laboratories to construction sites and woodworking shops.
Under COSHH, employers must:
The HSE (Health and Safety Executive) provides detailed guidance in HSG258: Controlling Airborne Contaminants at Work. This document explains how to design, test, and maintain LEV systems so they meet COSHH requirements.
What this means in practice:
If your business relies on LEV to control harmful substances, such as dust from sanding, welding fumes, or solvent vapours, you must ensure the system is functioning as designed. Regular testing isn’t optional. If your system fails or hasn’t been tested within 14 months, you could face enforcement action or fines from the HSE.
Ireland: Chemical Agents Regulations 2001
In Ireland, the equivalent legislation is the Safety, Health and Welfare at Work (Chemical Agents) Regulations 2001, along with its amendments. These regulations set out similar duties for employers who use or produce hazardous chemical agents in the workplace.
Under the Irish regulations, employers must:
The Health and Safety Authority (HSA) enforces these regulations and provides guidance on testing, record-keeping, and maintenance of LEV systems.
What this means in practice:
Every Irish employer who uses LEV must have a maintenance plan, arrange regular inspections, and keep clear records. If an inspector visits your site, you’ll be expected to produce documentation proving your LEV system has been tested within the last 14 months and is operating effectively.
Both HSE and HSA guidance require a Thorough Examination and Test (TExT) of your LEV system. This goes far beyond a quick visual check. It’s a structured, evidence-based process carried out by a competent person, someone with the right knowledge, skills, and experience to evaluate system performance.
A proper LEV examination and test includes:
If defects are found, employers are expected to fix them as soon as possible, not simply wait until the next inspection.
The law places ultimate responsibility on you as the employer, even if you use contractors or maintenance providers. You must ensure that:
Remember: “I didn’t know” or “my contractor handles that” is not a valid defence under COSHH or the Chemical Agents Regulations.
Both UK and Irish authorities require detailed record-keeping to prove compliance. Your LEV test report should include:
Keep these records for at least five years, and ensure they are available for inspection by the HSE (in the UK) or the HSA (in Ireland).
If inspectors find missing records, overdue tests, or defective systems, they can issue:
The cost of failing to comply can be far higher than the cost of regular testing and maintenance.
Through years of testing and inspection, DevineAir has seen many recurring issues that can easily be avoided:
If you’ve noticed any of these signs, don’t wait until it becomes a compliance headache. A quick check now can save you a lot of trouble later.
Complying with local exhaust ventilation regulations isn’t just about meeting legal requirements or avoiding fines. It’s about building a healthier, more productive, and more resilient workplace. When your air quality is under control, everything else improves, too.
Clean air means fewer cases of asthma, respiratory irritation, and fatigue. When workers aren’t struggling with the effects of poor air quality, they take fewer sick days and feel more comfortable doing their jobs. That’s good for morale and retention, and it reduces the hidden costs of absenteeism.
People work better when they can breathe easily. Studies show that good ventilation leads to sharper concentration, fewer mistakes, and a noticeable boost in output. A well-functioning LEV system keeps your operations running smoothly and consistently.
Regular testing and maintenance might feel like an extra expense, but it’s far cheaper than fixing a failed system or facing enforcement action. Spotting small faults early prevents bigger breakdowns and costly production downtime.
Clients, auditors, and employees all notice when you take health and safety seriously. A compliant LEV system demonstrates that your business is responsible, professional, and forward-thinking.
In short, effective LEV management protects your people, supports your productivity, and safeguards your bottom line. Compliance isn’t just the right thing to do; it's also a smart thing to do.
At DevineAir, we help businesses stay compliant and protect their people through every stage of LEV management. Our services include LEV Testing, LEV Design, and LEV Consultancy, backed by full LEV Logbooks to keep your records in order.
We also provide LEV Awareness Training to help your team understand their responsibilities, along with maintenance and performance support for Fume Cupboards, Microbiological Safety Cabinets (MSCs), and KI Discus testing. For ongoing reliability, our Maintenance & Contract Services and Airflow Indicators ensure your systems continue to perform safely and efficiently.
With Devine Air, you’re not just meeting compliance standards, you’re building a safer, healthier workplace where everyone can breathe easy.
Need help with your LEV system? Get in touch with our team today to book your next LEV test or discuss a tailored maintenance plan.
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