An agricultural harvester, comprising: a chassis; a threshing and separating system for separating grain from MOG; a grain cleaning system for further separating grain from residual MOG; the grain cleaning system having at least two grain pans (44, 102) for receiving a mixture of grain and residual MOG from the threshing and separating system; the grain cleaning system further having at least one sieve (46, 48, 50) for further separating grain, tailings, and residual MOG located beneath and rearward of the at least two grain pans (44, 102); and the grain cleaning system further having a grain transfer pan located beneath the at least two grain pans (44, 102); the at least two grain pans (44, 102) and the at least one sieve (46, 48, 50) being so arranged that, when in use, the mixture of grain and residual MOG undergoes at least two fall steps (100, 104); the grain cleaning system further having a cleaning fan for blowing air into and through the mixture of grain and residual MOG as it undergoes the at least two fall steps (100, 104) and as it moves over the at least one sieve (46, 48, 50); the cleaning fan having a fan wrapper terminating in a wrapper cut-off point; the cleaning fan further having a fan outlet air guide terminating in a vortex cut-off point; the fan wrapper and the fan outlet air guide together defining a fan main outlet leading to at least one additional fan outlet (106, 108, 110); and the wrapper cut-off point and the vortex cut-off point together defining a fan inlet, the wrapper cut-off point being located at an angle α counterclockwise from a vertical centerline through the center of the cleaning fan, the vortex cut-off point being located at an angle β clockwise from the vertical centerline through the center of the cleaning fan, the angle α being between 40° and 70°, and the angle β being between 30° and 60°. a chassis; a threshing and separating system for separating grain from MOG; a grain cleaning system for further separating grain from residual MOG; the grain cleaning system having at least two grain pans (44, 102) for receiving a mixture of grain and residual MOG from the threshing and separating system; the grain cleaning system further having at least one sieve (46, 48, 50) for further separating grain, tailings, and residual MOG located beneath and rearward of the at least two grain pans (44, 102); and the grain cleaning system further having a grain transfer pan located beneath the at least two grain pans (44, 102); the at least two grain pans (44, 102) and the at least one sieve (46, 48, 50) being so arranged that, when in use, the mixture of grain and residual MOG undergoes at least two fall steps (100, 104); the grain cleaning system further having a cleaning fan for blowing air into and through the mixture of grain and residual MOG as it undergoes the at least two fall steps (100, 104) and as it moves over the at least one sieve (46, 48, 50); the cleaning fan having a fan wrapper terminating in a wrapper cut-off point; the cleaning fan further having a fan outlet air guide terminating in a vortex cut-off point; the fan wrapper and the fan outlet air guide together defining a fan main outlet leading to at least one additional fan outlet (106, 108, 110); and the wrapper cut-off point and the vortex cut-off point together defining a fan inlet, the wrapper cut-off point being located at an angle α counterclockwise from a vertical centerline through the center of the cleaning fan, the vortex cut-off point being located at an angle β clockwise from the vertical centerline through the center of the cleaning fan, the angle α being between 40° and 70°, and the angle β being between 30° and 60°.