Ducts are a series of sectioned tubes, which transfer either heated or cooled air from the furnace or air conditioner, throughout the building.
![Large diameter duct work for ammonia plant](https://usbellows.com/wp-content/uploads/2019/06/ductwork-21-300x195.jpg)
Ducts are a series of sectioned tubes, which transfer either heated or cooled air from the furnace or air conditioner, throughout the building.