The answer to 'average cost for system upgrade' is that the cost can vary significantly depending on several factors. Typically, a full HVAC system upgrade can range from $3,000 to $15,000 or more, depending on the size of your home, the complexity of the installation, and the quality of the new equipment.
Some key factors that influence the cost include the type of HVAC system (e.g., furnace, heat pump, or air conditioner), the efficiency rating, the brand, and any necessary ductwork modifications. Additionally, labor costs, permit fees, and disposal of the old system can all add to the overall price. It's essential to get multiple quotes from local HVAC contractors to determine the most accurate cost for your specific situation.