'It's all right, it's HEPA' isn’t enough.
HEPA refers to air filter efficiency, but M-class is a certification for industrial vacuums and dust extractors, designed to protect operators from harmful dust that could cause diseases.
There’s a clear difference between what’s called an M-class filter and a certified M-class vacuum. To clarify, there’s no such thing as an 'M-class filter'. Some filters meet M-class standards, but adding one to your vacuum doesn’t make it M-class certified. Here's why…
An M-class vacuum must meet specific standards, but it’s not just about using HEPA. And if you did, which HEPA grade would you choose? The best, of course—but that still doesn’t guarantee certification.
Avoid vague terms like ‘best’ or ‘safest’ without clear definitions. Understanding your requirements and aligning expectations with the supplier ensures an informed decision.
M-class certification involves strict testing. Gone are the days when substandard equipment could sneak into the market with fake M-class labels. If you're after cheap imitations, look elsewhere.
It’s neither responsible nor smart to mislead about uncertified control measures.
Key points of M-class certification:
- The filter passes tests for efficiency, burst, and sharp object penetration.
- The system allows safe dust removal without risk to the operator.
- A signal alerts the operator before airflow drops below 20 litres per second in the largest hose.
Certification applies to the whole system. Only when all criteria are met can it carry the M-class label.
Practical points:
- The filter must withstand dust loading and pulsing air. Substandard filters would burst. It’s then tested with carpet tacks to ensure they’re safely deflected.
- Efficiency is tested, and while HEPA filters are common, they aren’t required.
- The system must support and remove the bag without dust leakage.
