Improved generating set

Generator set, comprising an internal combustion engine (2) that is fitted onto a platform (1), and at the opposite axial ends of which are associated a current generator (3) and a cooling fan (4) suitable for creating a flow of fresh air that flows according to the direction taken up by the axis of the engine, where said platform is equipped with an overlying sound-proofed shell (6) that provides, at the bottom, a surrounding case (60) that contains the engine and its additional parts, and takes care of channelling the flow of fresh air in transit, and at the top a service chamber that provides two manifolds for fresh air and exhaust air respectively, the first of which places the outside in communication with one end of the case, and the second of which places the opposite end of the case in communication with the outside.