HEPA filter fume extractors

The term HEPA filter (from the English High Efficiency Particulate Air filter) indicates a particular high efficiency filtration system present in the most diverse sectors thanks to their many possibilities of use and applications.

HEPA filters are part of the category of so-called "absolute filters", in particular they have a filtration efficiency between 85% and 99.995% and are classified according to their filtration efficiency in accordance with the UNI EN 1822 standards. They are in fact grouped into 5 classes with increasing performance characteristics.

The European standard for the classification of filters EN 1822-1:2009 refers to the classes:
 

• E10-E12 (EPA) high efficiency class also called “semi-absolute filters”;
• H13–H14 (HEPA) very high efficiency class also called “absolute filters”;
• U15–U17 (ULPA) very low penetration class.

The rating of the filter presents an index of least efficiency or maximum penetration, for a specific particle size. The certification of the class is based on the tests required by the EN 1822 standard and are indicated in the following tables: