The filter box belongs to the entire drying air circuit system and serves to contain the filter that in turn captures the tissue residues (fluff) produced in the drying operation. The filter box is a component manufactured by IMESA, made of carbon steel and painted. The perforated section prevents the movement of the filter bag in the direction of the fan and prevent linen from damages. The filter mounted on our dryers has been continuously improved. Today, the filters we use are more capacious and built with a performing fabric also used in the medical sector for its high filtering power. The simultaneous evolution of the assembly system allows ordinary cleaning operations to be carried out with ease.