The answer to 'how much does system upgrade cost in Illinois' is that the cost can vary widely depending on several factors. Upgrading an HVAC system typically ranges from $3,000 to $10,000 or more in Illinois, but the exact cost will depend on the size of your home, the efficiency of the new system, any necessary ductwork modifications, and labor costs in your local area.
Some key factors that influence HVAC upgrade costs include the type of system (e.g. furnace, air conditioner, heat pump), the SEER (Seasonal Energy Efficiency Ratio) rating, the brand and model, and whether you need to replace the entire system or just certain components. Older homes may also require more extensive work to accommodate new, more efficient equipment. Getting multiple quotes from licensed HVAC contractors in your local area is essential to determine an accurate cost for your specific home and needs.