Several signs can indicate that your air ducts may be leaking. Uneven heating or cooling in different rooms, higher-than-usual energy bills, and difficulty maintaining a consistent indoor temperature are common indicators. Audible whistling or hissing sounds from the ductwork can suggest air escaping through leaks. Visible dust or dirt around the duct openings and the presence of musty odors might indicate that unfiltered air is entering the system. Inspecting the ductwork for visible damage, such as disconnected joints or visible gaps, can also provide clues. Professional duct inspections using specialized tools, like smoke pencils or infrared cameras, can identify leaks that may not be easily visible. If you suspect duct leakage, addressing the issue promptly through professional inspection and sealing can improve energy efficiency, indoor comfort, and the overall performance of your HVAC system.