Oven the energy consumption of which is reduced

An oven (1) comprising an exterior body (2), a cooking cavity (3) wherein the cooking process is performed, a heater (4) that provides foodstuffs placed into the cooking cavity (3) to be cooked, a cooling fan (5) arranged between the exterior body (2) and the cooking cavity (3), that provides air circulation around the cooking cavity (3), and a control unit (6) that performs the cooking process in at least three phases being the first phase, the second phase and the third phase from the start to end of the cooking, in the first phase at a first temperature (T1) defined by the user at the start of cooking process for a first phase duration (t1), in the second phase, at a second temperature (T2) lower than the temperature (T1) defined by the user for a second phase duration (t2) and in the third phase at a third temperature (T3) higher than the temperature in the first or second phase for a third phase duration (t3), characterized by the cooling fan (5), the activation of which is delayed by the control unit (6) until the end of the first phase and that is activated in the second phase.