Refrigerated display unit comprising: - at least one refrigerating machine; - at least one refrigerated volume configured for containing a plurality of products to be kept at a temperature lower than the room temperature by means of the refrigerating machine; - at least one technical volume configured for containing an air treatment unit operatively connected to the refrigerating machine, said air treatment unit comprising at least one heat exchange battery, by means of which a cooling fluid and a carrier fluid exchange heat, and a plurality of fans placed at the inlet surface of said heat exchange battery; - one or more ducts of an air flow system, placed in fluid connection with the heat exchange battery and configured for conveying the refrigerated carrier fluid, moved by the fans, towards the refrigerated volume, wherein each conduit is provided with at least one outlet opening placed in fluid communication with the refrigerated volume, such as to diffuse a flow of refrigerated carrier fluid, according to a predefined direction, inside such refrigerated volume, wherein each conduit is divided into at least one first conduit portion with substantially vertical development, placed at a vertical wall of the refrigerated volume that is opposite the doors or walls, and into at least one second conduit portion with substantially horizontal development, hydraulically placed downstream of the respective first conduit portion, as well as above the refrigerated volume, wherein said second conduit portion is hydraulically connected to said at least one outlet opening, wherein said vertical wall is provided with a plurality of slots which put the first conduit portion in fluid communication with the refrigerated volume and, consequently, directly send part of the refrigerated carrier fluid flowing in each conduit to said refrigerated volume, - at least one carrier fluid flow distributor device, placed at the inlet surface of the heat exchange battery and between at least two fans, said at least one carrier fluid flow distributor device being arranged to avoid the overlapping of the carrier fluid flows of the fans placed at the sides of said carrier fluid flow distributor device, eliminating or reducing the mutual interference of such fans, the refrigerated display unit being characterised in that it comprises one or more doors or walls isolating the refrigerated volume from the external environment and in that said flow of said refrigerated carrier fluid is substantially parallel to the developing plane of said one or more doors or walls in a closed configuration and in that each slot has a substantially horizontal development and a width that is equal to ten times the respective height. - at least one refrigerating machine; - at least one refrigerated volume configured for containing a plurality of products to be kept at a temperature lower than the room temperature by means of the refrigerating machine; - at least one technical volume configured for containing an air treatment unit operatively connected to the refrigerating machine, said air treatment unit comprising at least one heat exchange battery, by means of which a cooling fluid and a carrier fluid exchange heat, and a plurality of fans placed at the inlet surface of said heat exchange battery; - one or more ducts of an air flow system, placed in fluid connection with the heat exchange battery and configured for conveying the refrigerated carrier fluid, moved by the fans, towards the refrigerated volume, wherein each conduit is provided with at least one outlet opening placed in fluid communication with the refrigerated volume, such as to diffuse a flow of refrigerated carrier fluid, according to a predefined direction, inside such refrigerated volume, wherein each conduit is divided into at least one first conduit portion with substantially vertical development, placed at a vertical wall of the refrigerated volume that is opposite the doors or walls, and into at least one second conduit portion with substantially horizontal development, hydraulically placed downstream of the respective first conduit portion, as well as above the refrigerated volume, wherein said second conduit portion is hydraulically connected to said at least one outlet opening, wherein said vertical wall is provided with a plurality of slots which put the first conduit portion in fluid communication with the refrigerated volume and, consequently, directly send part of the refrigerated carrier fluid flowing in each conduit to said refrigerated volume, - at least one carrier fluid flow distributor device, placed at the inlet surface of the heat exchange battery and between at least two fans, said at least one carrier fluid flow distributor device being arranged to avoid the overlapping of the carrier fluid flows of the fans placed at the sides of said carrier fluid flow distributor device, eliminating or reducing the mutual interference of such fans,