Illinois HVAC System Replacement Cost (2026)

How much does hvac system replacement cost in Illinois? 2026 ranges run $5.3k–$13.1k (avg $7.9k). Equipment, ductwork, refrigerant, and permits factored in.

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HomeScore forecasts repairs, replacement timing, and total ownership cost across 40+ home systems. Used by 8,200+ buyers, sellers, and long-term homeowners in 2026.