Aircraft cabin comprising an area to permit administration of first aid medical care to a passenger, with said area comprising at least a regulatory space located in front of an access door to said cabin, characterized by the fact that the rest of this area is occupied by a medical module fully dedicated to said first aid medical care. A heating unit heats an object to be heated by irradiating a light onto the object. An airflow deflector plate has a back face fixed on a sidewall of a region interconnecting the fan outlet and plenum inlet to modify the airflow pattern and obtain an airflow that is at a uniform pressure and flow rate for each product distribution line. Thereby, the method can effectively reduce the number of operations for merging data and increase the data writing speed.