This invention relates to a filtering assembly for air and gaseous fluids in general, which comprises a duct (2), which can be crossed by a gaseous fluid carrying pollutants of various types. The filtering assembly comprises: at least one filtering station to remove pollutants of the type of toxic gases and solid particles of dimensions preferably greater than 50 µm at least one conductive grille (4), having at least one hole (5) which faces and is proximate to at least one conductive filament (6), this grille (4) and this filament (6) being kept at a negative electric potential for the emission of electrons, which can be paired with pollutants of the solid particles and micro-organisms type of dimensions preferably comprised between 10 nm and 50 µm, in addition, downstream of the grille (4) is placed at least one accumulation plate (7), being kept at a positive electrical potential for the stable collection of pollutants paired with the electrons at least one emission source of ions (A), for the restoration of the electric charge of the gaseous fluid, flowing over the source.
