A duct may refer to: Duct (HVAC) (Heating Ventilating and Air-Conditioning), for transfer of air between spaces in a building Duct (anatomy), various ducts in anatomy and physiology Ducted fan, motor for aircraft Electrical bus duct, a metal enclosure for bus bars Duct tape, a kind of adhesive tape Telecommunication Atmospheric duct A set of Electrical conduits, entering a building underground is referred to as a duct bank.… (More on Duct)