When most people think of their air conditioning, they don’t stop to think about their ductwork. However, ductwork is just as important as the air conditioner itself, without ductwork what would happen to all that cold air? Without ductwork, we would not be able to direct the cold air to individual rooms. Any A/C system is only as good as the duct system set to deliver the air to each room. There are several types of ductwork systems and all have their pros and cons.
Metal duct is galvanized metal and can be insulated internally or wrapped on the outside, both of these are great ways to distribute the air, however both can be extremely expensive, with the wrapped being less expensive but still costly. Metal duct is made for the long haul, I’ve seen duct work that is 50 plus years old which is a great benefit if you can afford the upfront costs. Metal duct is rigid and once in place, unmovable. There can be no moving it out of the way when storing things in your attic or if it were necessary for a cable or repair person who had to move around it. On the other hand, the metal duct is more resilient and will stand up to more.