When a Health and Safety Executive (HSE) inspector walks into a motor vehicle repair (MVR) workshop unannounced, they aren’t looking for clipboard paperwork. They are looking for physical proof that you are protecting your mechanics from invisible, long-term health hazards like occupational asthma, chronic obstructive pulmonary disease (COPD), and lung cancer.
If your garage handles welding, body prep, spray painting, or indoor engine testing, local exhaust ventilation (LEV) is almost always top of their hit list.
1. The 14-Month LEV Test Logbook (COSHH Regulation 9)
This is the first thing an inspector will ask for. Under COSHH Regulation 9, every LEV system—whether it’s a flexible welding fume arm, a body shop extraction wall, or a tailpipe hose reel; must undergo a Thorough Examination and Test (TExT) by a competent person at least once every 14 months.
- What they check: The date on the test certificate/label attached to the unit.
- The trap: If that date is even a single week past the 14-month ceiling, or if you have no paperwork to prove a competent engineer (such as someone holding a BOHS P601 qualification) tested it, you are instantly in breach of the law. They will also check that you’ve kept those reports on file for at least 5 years.
2. Daily and Weekly User Checks
An HSE inspector knows that a system can pass a test once a year and still fail in day-to-day operation. They want to see evidence that your team is performing and recording routine visual checks.
- What they check: Are filters clogged? Are flexible hoses ripped, taped up, or dragging on the floor? Are airflow indicators (like magnehelic gauges or pressure drop meters) sitting in the green, or are they broken and ignored?
- The trap: A torn flexible duct on a welding extractor means the system is drawing ambient air through the rip instead of capturing fumes at the torch tip. Inspectors spot damaged ducting instantly.
3. Hood Positioning and Operator Habit
Even the best-engineered LEV system is useless if your mechanics don’t use it correctly. An inspector will watch how your team actually works on the shop floor.
- What they check: Is the extraction hood pulled close enough to the source? For welding, the capture hood generally needs to be within one duct diameter of the arc to be effective. Are mechanics leaving tailpipe hoses dangling or actually hooking them up during indoor engine idling?
- The trap: If a mechanic is MIG welding two feet away from a swing-arm hood because it’s “in the way,” the inspector will flag it immediately as a failure of supervision and staff training.
4. Paint Spray Booth and Isocyanate Controls
If your garage does accident repair or smart repairs, the spray booth is heavily scrutinized due to isocyanatesin two-pack paints, which are powerful respiratory sensitizers capable of triggering life-changing occupational asthma.
- What they check: Airflow velocity across the booth filters, door seals, pressure differentials, and whether operatives are relying on proper breathing apparatus (RPE) alongside the ventilation.
- The trap: Running a spray booth with saturated, choked filters or a faulty extraction fan motor creates a back-pressure risk that forces paint mists back out into the general workshop air.
5. The COSHH Risk Assessment Link
An inspector won’t just look at the hardware; they will look at the paper trail connecting the hazard to the control.
- What they check: Do you have a written COSHH risk assessment for the specific chemicals and processes used in your garage (e.g., welding fumes, solvent-based clearcoats, brake dust)? Does that assessment explicitly state that LEV is the primary control measure?
- The trap: Having an LEV system installed “just because” without a matching risk assessment shows a lack of systematic health and safety management.
The Bottom Line
When an HSE inspector finds failing LEV compliance, they don’t just leave a note. They can issue an Improvement Notice, a Prohibition Notice that shuts down an MOT bay or welding station on the spot, or prosecute the business directly.
Are your LEV tests coming up to that 14-month wire? Don’t wait for an inspector to find out. Take the free 10-minute COSHH Reality Check
to see where your workshop stands today, or message our team on WhatsApp
to get your testing sorted before your next audit window closes.