Which word corresponds to "duct" in German?

The term "duct" in the context of air systems, plumbing, or similar fields refers to a channel or tube designed for conveying fluids or air. In German, the word "Kanal" translates to "channel" or "duct," which is the appropriate equivalent for this context. This aligns closely with the primary function of a duct, which is to facilitate the flow of air or liquid through a defined passage.

Other terms provided do not relate directly to the concept of a duct. "Lüfter" translates to "fan," which pertains to devices generating airflow rather than the conduits themselves. "Überschuss" means "surplus" or "excess," and does not reflect any aspect of a duct's purpose or design. Finally, "Öse" translates to "eyelet" or "loop," which again does not connect with the definition or functionality of a duct. Thus, "Kanal" is the correct translation for "duct" in German.