The purchase of the vacuum cleaner seems trivial, but the right choice is determined by various factors and often some of these are underestimated or ignored.

The use of vacuum cleaner must guarantee the operator acoustic comfort, maximum performances again dust, dirt and health harmful substances. One of the factor that determine these aspects is the dust filtering class. 

The main features that are normally evaluated before purchasing a safety vacuum cleaner are:

• The Power in Watt
• The Capacity in litres
• The Price
• The Noisiness
• The Strenght of the product
• The Easy access to filters

Just the latter have a filtering ability  that can vary depending on the model. The constructional combination of the vacuum cleaner and its filter determine the filtering class.
Not everyone knows that filtering is divided into various classes that distinguish its efficiency. This class is expressed with letters (L, M, H). 

The choice of the right filtering class   can be a determining  factor and it is important to know the difference.

So, let's see their meaning and analize the different features that will make your choice the right one. 

L Class

Suitable filtering for any kind of suction and cleaning job in absence of health harmful dusts. For all powders with occupational exposure limit values 
(VLEP)  >1 mg/m³

M Class

Suitable filtering for health harmful powders with automatic filter cleaning. For all powders with occupational exposure limit values
(VLEP) ≥ 0,1 mg/m³.
Particularly suited for mineral powders and wooden powders.

H Class

Suitable for the processing of asbestos and the right choice for the restoration of surfaces subject to mold. Suitable for dry powders, harmful to health, non-flammable and for carcinogens with occupational exposure limit values
(VLEP) < 0,1 mg/m³.

 

Conclusions

Well, now you know what class L, class M and class H of vacuum cleaners mean; your next purchase will also be determined by this value.

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