H Class < 0.005% Dusts with maximum allowable concentrations (MAC) < 0.1 mg/m³ But what does this actually mean? M Class < 0.1% Dusts with maximum allowable concentrations (MAC) ≥ 0.1 mg/m³ L Class ≤ 1.0% Dusts with maximum allowable concentrations (MAC) > 1 mg/m³ The official wording of the differences are as follows: There are three main classes of dust extraction on the UK market currently L, M and H Class. These three factors highlight the importance of using dust extraction, but what about using the correct type of dust extractor? This brings me on to the second question “What is the difference between the various classes?” Legal requirements in the UK – the government run Health and Safety Executive (HSE) have made dust a primary focus, giving out fines of up to £2000 where inefficient, the wrong or no dust extraction is being used. The same applies to the tool accessories, with dust removal increasing the life by up to 3x longer. If your tool isn’t constantly clogged with dust, it will simply work more efficiently and require much less maintenance. Extracting dust will also prolong the life of your tool and accessories. Save loads of time and money – if you’re not having to clean-up dust and other cuttings, whether working on-site or in a workshop, packing away is much quicker meaning you can get home or moved on to the next job much sooner. The HSE reported that there were around 39,000 individuals suffering breathing and lung problems in the UK and there are around 8,000 deaths per year as a result of occupational cancer. The effect of exposure to dust may not only be felt by you, but also by those working in close proximity.Only a tiny amount of silica is needed to cause long term damage to your lungs. Your health and well-being is paramount – if you can see dust then you’re definitely breathing in dust, which can lead to many serious lung illnesses and diseases. I proceeded to answer the first question “why should I use dust extraction?” as follows: I paused for thought and realised there are numerous reasons why dust extraction should be used, but equally as important, it’s vital the right class is used for the task in hand. “Why should I use dust extraction?” and “What is the difference between the various classes?” I was recently working on the trade counter at one of our depots and was asked two questions regarding dust extraction…