The answer to 'how much to replace system upgrade in Chicago' is that the cost can vary significantly depending on several factors. Typically, a full HVAC system replacement in the Chicago area can range from $5,000 to $15,000 or more, with most homeowners spending around $8,000 to $12,000.
The exact cost will depend on the size of your home, the efficiency and capacity of the new system, the complexity of the installation, and any necessary ductwork modifications. Additionally, labor costs, permits, and disposal of the old system can all impact the final price. It's essential to get multiple quotes from reputable HVAC contractors in your local area to ensure you get the best value for your home.