The answer to 'how much to fix air duct sealing in Illinois' is that the cost can vary widely depending on several factors. In general, the cost to properly seal and insulate air ducts in a home in Illinois can range from $500 to $2,000 or more, depending on the size of the home, the accessibility of the ductwork, and the extent of the repairs needed.
The cost is influenced by factors like the materials used (mastic sealant, foil tape, insulation), the number of leaks or gaps that need to be sealed, and whether any ductwork needs to be replaced. Homes with older or hard-to-access ductwork may require more labor and therefore have higher costs. Getting multiple quotes from local HVAC contractors is essential to determine the right price for your specific situation.