Ventilators for Bulbs “Klima” Axial fans. Number of blades depending on back pressure. “Klima” Axial fans. Beside blades, diameter is also important for air and pressure. Number of fan blades variable. Plan of cel with fans on 80% capacity. Fans setup page. Fan status: off – stand-by – on – alarm/failure. Vertical air circulation. Horizontal air circulation. Easy to move. Easy to move.