The answer to 'how much to replace preventive maintenance' is that the cost can vary significantly depending on several factors. Typical preventive maintenance service for an HVAC system can range from $100 to $500 or more, depending on the size and complexity of the system, the age and condition of the equipment, and your location.
Some key factors that influence the cost include the number of units serviced, the specific maintenance tasks performed, the type of HVAC system (e.g., furnace, air conditioner, heat pump), and whether any repairs or part replacements are needed. Prices also tend to be higher in areas with a higher cost of living. Getting multiple quotes from local HVAC contractors is essential to finding the best value for your home.