Abstract: A method for producing an electrical fluid heater, in particular an air heater for a motor vehicle, including at least one fluid guiding channel for the fluid to be guided through, wherein at least one conductive polymer structure containing a polymer component and a conductive component, in particular carbon component, is coated, in particular cohesively, with at least one metallic layer.

Abstract: The invention relates to an electric heater, in particular auxiliary heating system, for a motor vehicle, comprising a volume (15) for receiving and conducting a liquid, in particular water, as well as a liquid inlet (13) and a liquid outlet (14) in such a manner that liquid can flow into the volume (15) via the liquid inlet (13) and can flow out via the liquid outlet (14), wherein at least one heating element (16), in particular a heating resistor, and a flow-conducting device (12) is disposed in the volume (15), wherein the flow-conducting device (12) comprises at least one flow-deflecting and/or turbulence-generating device (25) for deflecting the flow and/or for generating turbulence.