What does 'duct leakage' refer to in HVAC contexts?

In HVAC contexts, duct leakage refers to unintentional air escaping from ductwork, which can lead to significant inefficiencies in heating and cooling systems. When air leaks from ducts, the conditioned air intended for living spaces can escape into unconditioned areas, such as attics or crawlspaces. This not only causes a loss of efficiency because the HVAC system must work harder to maintain desired temperatures but can also lead to increased energy bills and uneven temperature distribution within a building.

Duct leakage can negatively impact indoor air quality, as outside contaminants can be drawn into the system through these leaks. Ensuring ducts are properly sealed and insulated is vital for maintaining an efficient and effective HVAC system.