The present invention relates to a heating system component (100, 700, 900) for a heating system for heating a fluid medium, said heating system component (100, 700, 900) comprising: a carrier unit (110, 910) comprising a wet side, wherein said wet side corresponds to a surface of said carrier unit (110, 910) configured to be in contact with said fluid medium; a heating unit (120, 720, 920). The heating unit (120, 720, 920) may be coupled to the carrier unit (110, 910) by means of a coupling step, wherein said coupling step comprises at least one of a soldering step, a laser welding step, a gluing step, an ultrasonic welding step, and/or a friction welding step. The carrier unit (110, 910) may comprise aluminum.