Grainger carries a wide range of duct fans and accessories to help complete, repair and add capacity to HVAC systems. Add booster fans to existing ductwork to help move air through ducts and increase the flow of cold and warm air to a room. Find replacement dryer duct fans to help clothes dryers run more efficiently. Search a wide range of inline centrifugal and mixed flow duct fans to help find the fan that can fit your application. Make Grainger your one source for duct fans and accessories. Shop online today!