Ductwork supplies are essential components for any HVAC system. They are the conduits that allow air to flow from the furnace or air conditioner to the various rooms in a home or building. Ductwork supplies can include a variety of items, such as flexible ducts, rigid ducts, registers, grilles, dampers, and diffusers. Flexible ducts are used to connect the furnace or air conditioner to the main ductwork, while rigid ducts are used to carry air to the various rooms in the home or building. Registers, grilles, dampers, and diffusers are used to control the air flow and direct it to the various rooms. All of these components are necessary for a properly functioning HVAC system.