Aluminum Bi-Metal Radaitors

Hey everyone I’m new here and haven’t really said much minus the occasional post or two. Today I stumbled upon something I have yet to see in the plumbing industry, and wanted everyone’s thought on the topic. It was an “Aluminum Bi-Metal Radiator” for heating. Seems as if they are pretty efficient with btu outputs and work with both steam and water. Has anyone heard or seen these radiators around their neck of the woods?