The answer to 'how much to replace air duct sealing in my area' is that the cost can vary significantly based on several factors. Generally, the cost to replace air duct sealing in your home can range anywhere from a few hundred dollars to several thousand, depending on the size of your home, the accessibility of the ducts, and the complexity of the work required.
Some key factors that influence the cost include the square footage of your home, the number of ducts that need to be sealed, the materials used (such as mastic sealant or foil-backed tape), and whether any ductwork repairs or replacements are needed. Additionally, labor costs can vary based on your local market and the expertise of the HVAC technician performing the work.