The answer to 'what is ductwork' is the system of ducts, or pipes, that carries heated or cooled air from your HVAC system throughout your home. Ductwork is an essential component of a central heating and cooling system, transporting air from the furnace or air conditioner to the various rooms in your home.
Ductwork is typically made of sheet metal, flexible plastic, or fiberglass, and it is designed to minimize air leaks and distribute air efficiently. The size, shape, and layout of the ductwork are critical to the performance of your HVAC system, as they determine how effectively the air is circulated throughout your home.