NOVELTY - The heating device has metallic and non-metallic conductive materials in the form of thin films printed on flexible substrates, which are made of polyethylene terephthalate, polyethylene naphthalate, cork, thermoplastic polyolefin or meshes coated with polymer films. The rigid substrates are of concrete, glass, ceramic or wood agglomerates made by screen printing, rotogravure or inkjet printing on roll to roll or sheet to sheet systems. A barrier film provides mechanical and electrical protection. An electronic control system has a power supply for heating circuits and a temperature sensor.    USE - Heating device for heating indoor and outdoor deck, chair, sofa and benches, particularly seats, footrests and arms and doors and dashboards of cars (Claimed).    ADVANTAGE - The geometry used for printing the bus bars is perpendicular, which allows subsequent cutting of printed circuits in two different directions, without any interruption in conduction of electric current through the bus bars, and thus ensures efficient conduction of electric current through the bus bar. The continuous film of carbon or carbon composite material ensures high temperature uniformity over the entire surface of the device by obtaining a larger heating area and opportunity to perform the required size sectioning circuit in two different directions without loss of functionality. The device has low weight, thinness and a high flexibility and is easily rolled with another type of material. The power dissipated at the surface is lower, due to which lower energy is consumed.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a method for printing a sheet-system on flexible or rigid substrates of a heating device;    (2) a method for printing a roll to roll system on flexible substrates of a heating device; and    (3) a printing method by ink jet technology in a sheet-fed system of a heating device.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a heating device.    Carbon composite material (1)    Bus bar (2,3)