The invention relates to an arrangement and method for heating objects in the microwave field, the operating space being enclosed in a pressure-tight manner. In consequence, pressures occur which are dependent on the respective temperature. The necessary moisture is present in the or is added from the start. The energy is radiated in through pressure-tight windows. The operating space is dimensioned such that the radiation is distributed uniformly over the object. The cooling-down method is of particular importance, consisting essentially of the coolant being sprayed into, or flowing through the complete operating space at the respective pressure.
