The air chiller is designed to lower the temperature of the eviscerated birds from about +38° C to approximately +2°/4° C by forced cooled air. The birds are hung on single bird shackle or on different types of multi birds carriers according to necessities, the capacity of the plant and the space available. Cattaruzzi s.r.l. has been the first company in the world in year 1982 to install a single shackle air chilling/grading line 1.200 mt. long and in 1992 a single shackle air chilling/grading line 4.127 mt.long.