Is Your Workplace Air Safe? What LEV Systems Actually Do — And Why It Matters More Than You Think

If you work in manufacturing, woodworking, welding, pharmaceuticals, or any industry where dust, fumes, or vapours fill the air — you already know the feeling. That slightly stale, chemical-edged air. The fine particles you can see dancing in a shaft of light. The cough that never quite goes away.

Here's the reality: what you can't see is often far more dangerous than what you can. And that's exactly where LEV systems come in.

So, What Exactly Are LEV Systems?

LEV systems — short for Local Exhaust Ventilation systems — are engineered solutions designed to capture airborne contaminants right at the source before they have a chance to spread through your workplace.

Think of them as the first line of defence against occupational lung disease, chemical exposure, and long-term health damage. Rather than relying on workers to wear masks all day — which is uncomfortable, impractical, and often inconsistently used — LEV systems tackle the problem at the point of generation.

A well-designed LEV system typically consists of a hood or capture point, ducting, an air cleaner or filter unit, and a fan. Each component plays a role, and each needs to be correctly specified for the job it's doing. There's no one-size-fits-all here — a LEV system for a sanding booth looks very different from one designed to capture hexavalent chromium fumes in a chrome plating facility.

Why So Many Businesses Get It Wrong

Here's something that surprises a lot of people: having a LEV system installed doesn't automatically mean your workers are protected.

Systems get clogged. Fans lose efficiency. Ductwork develops leaks. Hoods get repositioned by workers who find them inconvenient. Over time, even a brilliantly designed system can become almost useless — and the scary part is, it can look completely fine from the outside.

That's why regular maintenance and inspection aren't optional extras. They're a legal requirement under the Control of Substances Hazardous to Health (COSHH) Regulations — and more importantly, they're what actually keeps people safe.

Understanding LEV Testing: More Than Just a Tick-Box Exercise

Let's talk about something that doesn't get nearly enough attention: LEV testing.

LEV testing is the process of formally examining, measuring, and verifying that your Local Exhaust Ventilation system is actually performing to the standard it was designed for. It's not just a visual check — it involves airflow measurement, face velocity testing, capture velocity assessments, and a detailed inspection of every component in the system.

Under COSHH Regulations, most LEV systems must undergo thorough examination and testing at least once every 14 months. For higher-risk processes — like those involving carcinogens or respiratory sensitisers — that interval can be as short as every month.

At Ventx Labs, our LEV testing process goes well beyond the minimum. We use calibrated equipment to measure actual airflow performance, compare results against your system's original design specifications, and produce a detailed written report you can rely on — not just for compliance, but as a genuine tool for understanding your workplace risks.

5 Signs Your LEV System Might Not Be Doing Its Job

Not sure if your current system is up to scratch? Here are some red flags to look out for:

• Visible dust or fume build-up on surfaces near the work area

• Workers complaining of irritated eyes, throat, or persistent coughing

• A noticeable change in the sound of the extraction fan

• It's been more than 14 months since the last formal LEV testing

• The system has been modified or the process has changed since installation

If any of these sound familiar, it's time to pick up the phone.

Why Ventx Labs?

At Ventx Labs, we've been working with businesses across the UK to design, install, maintain, and test LEV systems that actually perform. We're not here to sell you a box that looks good on paper and collects dust in the corner. We're here to make sure the air your team breathes is genuinely clean.

Our engineers understand that every workplace is different. The way you work, the materials you handle, the layout of your floor — all of it shapes what a good LEV solution looks like for you. We take the time to get it right, because the stakes are too high not to.

Whether you're starting from scratch, need an existing system assessed, or are overdue for LEV testing — we've got you covered.

The Bottom Line

LEV systems save lives — but only when they're properly designed, maintained, and tested. Don't wait for a health scare or a regulatory visit to find out yours isn't working.

Your workers trust you to protect them. Ventx Labs is here to help you do exactly that.

Ready to get your LEV system assessed? Contact Ventx Labs today.