The answer to 'how much to replace air duct sealing in Illinois' is that the cost to replace air duct sealing can vary significantly depending on several factors. Generally, the cost for professional air duct sealing in Illinois can range from $500 to $2,000 or more, depending on the size of your home, the complexity of the ductwork, and the extent of the sealing required.
The key factors that influence the cost include the square footage of your home, the linear feet of ductwork that needs sealing, the accessibility of the ductwork, and any necessary repairs or modifications to the existing ductwork. Additionally, the experience and expertise of the HVAC contractor you hire can also impact the overall cost.