The apparatus has a prefilter (2) and a helical suction fan (4) provided in a bottom part of a rigid box (1), and an acoustic silencer (5) i.e. noise trap, and an absolute filter (6) provided in a top part of the box. The prefilter communicates with an air intake (3), and retains major particles present in ambient air. The fan allows circulation of large volume of air toward the top part of the box. The acoustic silencer comprises absorbing elements to reduce noise level of aerodynamic installation. The absolute filter retains 99.999 percent of the particles present in the air.
