The answer to 'how to fix air duct sealing' is to properly seal any leaks or gaps in your HVAC ductwork. This helps improve energy efficiency, indoor air quality, and the overall performance of your heating and cooling system.
Start by visually inspecting your ductwork for any cracks, holes, or gaps. Use a duct sealant or mastic compound to seal these areas. You can also use foil-backed duct tape, but mastic is a more durable and long-lasting solution. Make sure to clean the duct surfaces before applying the sealant. For larger holes, you may need to use a duct patch kit. After sealing, you can also insulate the ducts to further improve efficiency.