What is the role of insulation in ductwork?

Insulation in ductwork primarily serves to maintain the desired temperature of the air traveling within the ducts. When heating or cooling air moves through ducts, it can lose or gain heat depending on the surrounding temperature. Proper insulation minimizes this heat transfer, helping to keep the air at the set temperature as it travels from the HVAC system to the living or working spaces. This not only enhances the efficiency of the HVAC system by reducing energy loss but also ensures that the conditioned air remains at optimal levels for comfort.

While sound reduction, protection from physical damage, and moisture barriers are relevant considerations in ductwork design and construction, they do not encompass the primary purpose of insulation. Insulation's most crucial role is to create a thermal barrier that keeps the conditioned air at its intended temperature until it reaches its destination.