noun

a tube or passageway in a building or machine for air, liquid, cables, etc.

leading the air through ducts in the floor

tube,channel,passage,canal,vessel,conduit,culvert,pipe,pipeline,outlet,inlet,flue,shaft,vent,airway,ductus,ductule,vas,trachea

verb

convey through a duct.

a ventilation system that must be ducted through the wall