In most older homes and many newer homes, metal ductwork carries hot or cold air from the HVAC equipment to rooms throughout the house. Most of the time, homeowners pay little attention to their ductwork as long as the HVAC equipment itself is working and the indoor environment remains comfortable.
But what homeowners don’t realize is that their ductwork could easily be leaking one-third or more of that conditioned air into the attic or building envelope before it ever reaches its final destination. The result is an HVAC system that works harder and longer, and consumes much more energy, in order to heat and cool a home.