Filtering panel for the passive filtering of air and gases

A filtering panel configured for the passive adsorption, by natural non-forced convection, of micro particles such as atmospheric pollutants or the like, said panel comprising a first outer layer, a second outer layer and an intermediate filtering layer arranged between said first and second outer layers, said intermediate filtering layer comprising a support structure impregnated with porous active carbons, wherein said support structure of said intermediate filtering layer is composed of heat-welded polyester fibres, wherein a weight per square meter of said active carbons is equal to 50% of a weight per square meter of said support structure, and wherein said support structure has a weight of 280 g. per square meter, and an exposed surface area of said active carbons has a value up to 280,000 square meters per square meter of said intermediate filtering layer.