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What Are M-Class Vacuums?

M Class dust extractors, also known as M Class vacuums, are an essential tool for capturing and filtering mid-level hazardous dusts such as those found in hard woods, board materials, some paints, concrete, bricks, and crystalline silica. These dust extractors have been tested and certified to capture at least 99.9% of dust particles, making them suitable for use in a variety of professional and industrial settings.

In addition to their high level of filtration, some M Class dust extractors have features such as flow sensors or alarms that alerts the user to a drop in suction, ensuring that all dust is effectively and efficiently captured. More expensive M-Class vacuums provide additional features such as an auto-start and delayed shut-off function for power tools, automatic filter cleaning and the ability to handle both wet and dry cleaning.

What’s The Difference Between M-Class, L-Class & H-Class Filtration?

The difference between L/M/H Class vacuums are their level of filtration, in the most simple explanation, M-class vacuums (medium risk), L-class (low risk), H-class (high risk). Each dust filtration level is suitable for handling more hazardous dust, be sure to always check the dust types you are dealing with before assuming your dust extractor is capable of safely handling your materials.

This is a simple explanation of the dust exposure levels each class of filtration can handle:

L-Class = 99% filtration suitable for exposure standard of >1mg/m3

M-Class = 99.9% filtration suitable for exposure standard of >0.1mg/m3

H-Class = 99.995% filtration suitable for exposure standard <0.1mg/m3

For more information we have an in-depth article explaining the L/M/H Dust class difference here

What are the requirements for using M-class Vacuums/Dust Extractors in compliance with OSHA regulations and guidelines?

All M-Class vacuums must comply with Class M requirements outlined in Australia WHS guide here. Keep in mind, each M-Class machine has its own operating manual which must be followed.

You Cannot install an M-class Filter into any non M-class labelled dust extractor and be protected from M-class level hazardous dusts.

What are the requirements for using M-class Vacuums/Dust Extractors in compliance with OSHA regulations and guidelines?

All M-Class vacuums must comply with Class M requirements outlined in Australia WHS guide here. Keep in mind, each M-Class machine has its own operating manual which must be followed.

You Cannot install an M-class Filter into any non M-class labelled dust extractor and be protected from M-class level hazardous dusts.

Is M-Class Or L-Class Better?

M-Class Dust extractors serve a different purpose than L-class as they are able to handle a more hazardous dust exposure. This does mean the filtration on an M-Class vacuum is superior to that of an L-class vacuum.