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Explanation: Although I can still here my mother yelling at me every cold winter morning to get off the register (vent) and get to school, I believe that in this case, Ernst's "damper register" will better suit your needs (Ernst: WB der industriellen Technik). Hope this helps, Will
Explanation: Just to cloud the issue a bit -- strictly speaking, the register is the plate through which the heated air passes (hence the term in Ernst, since it often incorporates a damper to regulate the air flow). If the 'Heizregister' actually means the heating element (usually one or several parallel lengths of pipe with fins), it should be called a 'Heizkörper', and then in English, in this case, it would be a 'sub-floor radiator'.
Ken Cox Local time: 10:53 Native speaker of: English PRO pts in category: 281
Explanation: I also stood on the register when I was a kid, Will, but we certainly did not have what the Germans refer to today as "Bodenheizung". If this gizmo "contains" the copper pipe then damper might not be right because the damper = register from Ernst might mean a regulator of some type. This "Register" might be a sort of framework to hold the piping in the right position, keep the piping "in register" – not too deep or high, etc called "clipping rack" at this British site:
OR like Ken says, it might be an under floor arrangement of special flat, thin heating panels, like a modern radiator, which would more efficiently transfer heat energy to the floor surface above than just simple piping would.
In these references, they speak of heating systems of various types but they write WITH register:
"Bodenheizung mit Register" or "Kachelofen mit Registereinsatz" and " Nachdem die Form der Verkleidung als Gestaltungselement bestimmt worden ist, werden die Heizregister auf die gegebene Paneel-bzw. Brüstungfläche verteilt.
I give up! - Dan
Dan McCrosky Local time: 10:53 Native speaker of: English PRO pts in category: 20