The answer to 'types of ductwork' is that there are several common types of ductwork used in HVAC systems for homes. The most common are metal ducts, flex ducts, and ductboard. Metal ducts are made of galvanized steel or aluminum and are the most durable option, but they can be more expensive to install. Flex ducts are made of a flexible, insulated material and are easier to install in tight spaces, but they may not be as efficient as metal ducts. Ductboard is a rigid, insulated material that is lightweight and easy to work with, but it is not as durable as metal ducts.
The type of ductwork used in a home depends on factors like the size and layout of the home, the HVAC system, and the budget. It's important to work with a professional HVAC technician to determine the best ductwork solution for your home.