A baking oven and a method for controlling the exhaust flow from a cooking chamber of the baking oven, the flow being discharged by a fan. The method includes increasing a speed of the fan during a first time interval after. A first temperature of the baking oven is measured using a first temperature sensor during the first time interval. At the same time a second temperature of the baking oven is measured using a second temperature sensor. An electronic controller is used to determine the temperature difference between the temperatures during the first time interval. At a selected fan speed, the determined temperature difference varies from an initial temperature difference measured at the beginning of the first time interval. The controller sets at least one of the fan speed and a position of a bypass damper as a function of the selected fan speed.