What is a common consequence of not properly insulating ductwork?

Not properly insulating ductwork commonly leads to poor energy efficiency. When ductwork is not insulated, heated or cooled air can escape into unconditioned spaces, such as attics or walls, leading to significant energy loss. This means that the heating or cooling system has to work harder to maintain the desired temperature within the living space, resulting in higher energy consumption and costs. Furthermore, inadequate insulation can cause temperature imbalances throughout a building, making it less comfortable and more expensive to operate.

In contrast, overheating, mold growth, and air contamination can sometimes be associated with ductwork issues, but they are not as direct a consequence of insufficient insulation as energy inefficiency is. Overheating typically results from problems like incorrect system sizing or mechanical failure. Mold growth can occur due to humidity and moisture issues, which are more related to stagnant air rather than insulation alone. Air contamination can arise from various sources, including dirt accumulation or issues with the HVAC system itself, rather than insulation problems.