A heating, ventilation, and/or air-conditioning system, comprising at least one ventilation device able to force an air flow to circulate through the heating, ventilation, and/or air-conditioning system and an electric radiator, through which the air flow is heated, the electric radiator including at least one heating body fitted with at least one heating element, at least one electronic control unit configured to power and control the operation of the at least one heating element and a housing in which the at least one electronic control unit is seated, the at least one heating body being fastened to the housing, the housing including a back wall facing the at least one heating body extending in a main plane of extension, the at least one heating element of the at least one heating body extending perpendicularly to the main plane of extension of the back wall and principally in a longitudinal direction having a first longitudinal end facing the at least one electronic control unit and an opposite second longitudinal end, the at least one heating element including several resistive elements and plates forming electrodes, the resistive elements being framed by the plates, wherein each plate of the at least one heating element is configured to have a connection component at one longitudinal end of the at least one heating element for the electrical connection of mid e at least one electronic control unit, at least one of there connection components being disposed at each of the longitudinal ends of this heating element.