Patent ID: 8059944

Claim:
A heating device, comprising a housing ( 15 ) through which air to be heated can pass delimiting a heating space controlled by an electrical power supply control circuit connected to a power supply source, characterised in that the heating space comprises a plurality of electrical heating modules ( 14 ) mounted to the housing ( 15 ), each heating module being independently separable from the housing ( 15 ) and the heating space and including a first and a second approximately parallel metallic ribbon ( 10 , 10 â€²) along a transverse direction (D) and by resistive elements with a positive temperature coefficient ( 12 ) fixed between the two metallic ribbons, wherein the housing ( 15 ) also comprises power supply compartments ( 20 ) with a shape suitable for housing power supply modules ( 200 ) that can be connected to the electrical power supply control circuit and to a group consisting of at least one heating module ( 14 ), each power supply module comprising an electronic switching element ( 203 ), and wherein the power supply control circuit is arranged on one side of the housing, in a power supply control compartment ( 50 ), and wherein the power supply compartments ( 20 ) are arranged in parallel close to the control circuit along the transverse direction (D) with an equal spacing between each compartment.