Cooling system

The cooling unit has several individual box-shaped coolers (2,15), each having a cooling network (5) and two side parts (16), where at least one has a different network depth (t). At least one cooler has a different height from the other coolers and a projection (ue) in the front or rear wall area. The edge areas of the box arrangements are formed by a collection box of each adjacent cooler. The cooling unit has a radial ventilator (8) inside the box-shaped arrangement, which sucks in fresh air through a suction opening (9) in the front wall (10) and blows cool air through the coolers. The rear wall of the unit is closed.