The answer to 'how much to replace air handler in Illinois' is that the cost can vary significantly depending on several factors. As a general range, a typical air handler replacement in Illinois can cost between $2,000 to $6,000, including labor and materials. The exact price will depend on the size and efficiency of the new unit, the complexity of the installation, and any necessary ductwork modifications.
Factors that can influence the cost include the brand and model of the air handler, the accessibility of the installation site, the need for any electrical or plumbing work, and the experience and labor rates of the HVAC contractor. It's important to get multiple local quotes to compare prices and find the best value for your home.