An exhaust Duct is mainly used to carry exhaust out of a work area or the inside of a structure. This can be connected to an exhaust outlet or a fume hood. This duct's pipe should ideally run straight to prevent obstructions to the air's unimpeded movement through the ductwork.
A fabric Duct is a round, semi-round, or quarter-round duct intended for the supply and distribution of warm or cooled air. This duct is made of lightweight fabric rather than, say, galvanised steel, stainless steel, or aluminium. As part of the supply air, ducts frequently transport ventilation air as well.