Mobile filtering unit designed for internal use aside the machine, particularly suitable for the extraction and filtration, in occasional and noncontinuous operations, of coarse dusts and/or shavings coming from dry processing of wood, leather, paper, plastic, rubber, composite materials, etc… It is complete of electrical board and electro-fan certified ATEX integrated in the structure with an anti-spark brass coating on the clearance disc of the inlet port. Filtering system with antistatic polyester sleeves with direct discharge into plastic bags.