Abstract: A heating device includes a main body able to house in its interior at least one heating element having means to adjust the temperature of such a heating element, characterized in that the heating device further comprises a system able to determine the possible variation of the temperature of the heating element according to the amount of energy provided to the heating element. Examples of such a heating device include heating pads, electro-blankets, heating mats and the like. A related method for possibly vary such temperature of the heating element is also disclosed. The heating device is capable of maintaining the temperature of the outer surface of the heating device within predetermined limits of efficiency and safety to the user.