- An exhaust hood , which is positioned above a cooking device , comprising a body ; an exhaust duct which is connected to a chimney opening to the outer environment; one or more than one fan which is mounted into the exhaust duct ; one or more than one temperature sensor which is disposed onto the body and/or into the exhaust duct , and which measures the temperature of the air rising from the cooking device and from a cooking receptacle by heating up during a cooking process; a timer which measures the heating time (T) elapsing until the temperature of the air rising from the cooking device reaches a preset value; and a control unit which is adapted to - calculate the rate of increase in temperature according to the data received from the temperature sensor and the timer , - determine, according to the rate of increase in temperature, the type of the cooking device and - determine, according to the type of the cooking device , an operation level of the exhaust hood which is defined as the fan motor speed or the number of fans to be activated, characterized in that , the control unit is further adapted to - compare the heating time (T) elapsing until the temperature sensor detects a predetermined temperature value after the operation of the cooking device with a predetermined first threshold heating time (T1) and a predetermined second threshold heating time (T2) in the control unit and determine if the cooking device is a gas cooker (X), an induction heating cooker (Y) or an electric cooker (Z), - determine that the cooking device is a gas cooker (X) if the heating time (T) is lower than the first threshold time (T1) (T<T1), - determine that the cooking device is an induction heating cooker (Y) if the heating time (T) is higher than the first threshold time (T1) (T<T1) and lower than the second threshold time (T2) (T1<T<T2), and - determine that the cooking device is an electric cooker (Z) if the heating time (T) is higher than the second threshold time (T1) (T>T2). - calculate the rate of increase in temperature according to the data received from the temperature sensor and the timer , - determine, according to the rate of increase in temperature, the type of the cooking device and - determine, according to the type of the cooking device , an operation level of the exhaust hood which is defined as the fan motor speed or the number of fans to be activated, - compare the heating time (T) elapsing until the temperature sensor detects a predetermined temperature value after the operation of the cooking device with a predetermined first threshold heating time (T1) and a predetermined second threshold heating time (T2) in the control unit and determine if the cooking device is a gas cooker (X), an induction heating cooker (Y) or an electric cooker (Z), - determine that the cooking device is a gas cooker (X) if the heating time (T) is lower than the first threshold time (T1) (T<T1), - determine that the cooking device is an induction heating cooker (Y) if the heating time (T) is higher than the first threshold time (T1) (T<T1) and lower than the second threshold time (T2) (T1<T<T2), and - determine that the cooking device is an electric cooker (Z) if the heating time (T) is higher than the second threshold time (T1) (T>T2). <EOS>