Hepa Filter The Astroven ATEX, is a Hepa filter suitable for filtering particles in the air such as viruses, germs, toxic dust or aerosols. For applications in special air conditioning and ventilation systems for food, chemical, pharmaceutical, etc. Which have to meet the demanding requirements of explosive atmospheres. In areas with potentially explosive atmospheres (those that in atmospheric conditions are a mixture of air and hazardous substances in the form of gases, vapors, mists or dusts and, in which after ignition occurs, combustion spreads to the whole of the unburned mixture) the filters are conductors of electricity, prepared by means of a connection cable for electrostatic discharge, comply with the European ATEX directive for products used in explosive atmospheres. Astroven (Galvanizado) ATEX. Astroven (MDF) ATEX.