The answer to 'how much does heat exchanger cost in Illinois' is that the cost can vary significantly depending on several factors. Typically, heat exchanger replacement for a residential HVAC system in Illinois can range from $800 to $2,500 or more, installed.
The exact cost will depend on the size and type of your HVAC system, the complexity of the repair, the brand and quality of the heat exchanger, and the labor rates in your local area. It's essential to get quotes from multiple licensed and insured HVAC contractors in your local Illinois market to get the best price.