The answer to 'how much does preventive maintenance cost in Illinois' is that the cost can vary widely depending on several factors. Typical ranges for annual HVAC preventive maintenance in Illinois are generally between $100 to $300 per unit, but the exact price will depend on the size and complexity of your system, the contractor's service fees, and your location within the state.
Factors that can influence the cost include the number of HVAC units, the age and condition of your equipment, the level of service required (basic tune-up vs. comprehensive inspection), and whether any repairs or part replacements are needed. Regular maintenance is essential to keeping your system running efficiently and avoiding more costly breakdowns, so it's important to budget for these services annually.