HVAC System Replacement Cost in Illinois
Across Illinois, homeowners pay $10,200 to $22,100 for full HVAC system replacement. Climate, labor rates and housing age all move the price. In Illinois's cities, the median home dates to about 1969.
HVAC System Replacement Prices in Illinois Cities
| City | Estimate | Heating / cooling degree days |
|---|---|---|
| Chicago | $9,900 to $21,500 | 6,017 / 861 |
| Aurora | $10,200 to $22,200 | 6,255 / 910 |
| Naperville | $13,300 to $28,900 | 5,975 / 938 |
| Joliet | $10,000 to $21,800 | 6,171 / 872 |
| Rockford | $8,400 to $18,300 | 6,496 / 838 |
| Elgin | $10,200 to $22,300 | 6,591 / 807 |
| Springfield | $8,600 to $18,600 | 5,455 / 1,094 |
| Peoria | $8,400 to $18,200 | 5,613 / 1,157 |
| Champaign | $8,600 to $18,700 | 5,656 / 1,072 |
| Waukegan | $9,300 to $20,300 | 6,702 / 683 |
| Cicero | $9,200 to $19,900 | 5,752 / 1,111 |
| Bloomington | $9,300 to $20,200 | 6,022 / 977 |
| Schaumburg | $10,700 to $23,300 | 6,462 / 879 |
| Evanston | $11,500 to $25,000 | 6,365 / 805 |
| Arlington Heights | $11,700 to $25,600 | 6,085 / 933 |
| Bolingbrook | $10,800 to $23,600 | 6,062 / 947 |
| Decatur | $8,000 to $17,400 | 5,443 / 1,115 |
| Palatine | $11,100 to $24,100 | 6,816 / 652 |
| Skokie | $10,900 to $23,700 | 6,365 / 805 |
| Des Plaines | $10,500 to $22,800 | 5,974 / 1,003 |
| Orland Park | $10,800 to $23,500 | 6,040 / 1,119 |
| Oak Lawn | $9,700 to $21,200 | 5,698 / 1,161 |
| Mount Prospect | $11,100 to $24,200 | 6,085 / 933 |
| Berwyn | $9,600 to $20,900 | 5,752 / 1,111 |
| Tinley Park | $10,800 to $23,600 | 6,349 / 858 |
| Wheaton | $11,900 to $26,000 | 5,975 / 938 |
| Normal | $9,000 to $19,600 | 6,022 / 977 |
| Oak Park | $11,500 to $25,000 | 5,752 / 1,111 |
| Hoffman Estates | $11,300 to $24,600 | 6,462 / 879 |
| Downers Grove | $11,900 to $25,900 | 5,975 / 938 |
From 2020 through 2025, NOAA recorded 746 winter storm and ice events, 783 heat events, 440 extreme cold events and 1,773 hail reports in Illinois. Those are the days when emergency HVAC calls pile up.
When Replacement Makes Sense
- Both the heating and cooling equipment are 15 years old or more
- Both units keep needing repairs
- Some rooms are uncomfortable, and the energy bills are high
- An old R-22 AC paired with an aging furnace
What Moves the Price
- Furnace plus AC, or heat pump plus air handler
- Efficiency ratings: SEER2, AFUE and HSPF2
- Equipment sized to the house and climate
- Duct repair or replacement
- Thermostat and zoning upgrades
- Permits and electrical work
Common Questions
How often should an HVAC system be replaced?
Most systems get replaced every 15 to 20 years. AC units and heat pumps usually wear out before gas furnaces do.
Can I replace only the AC and keep my furnace?
Yes, as long as the indoor coil and blower work with the new AC. A mismatched system loses efficiency and can void the warranty.
Other HVAC Prices in Illinois
- Furnace Replacement in Illinois
- Furnace Repair in Illinois
- AC Installation in Illinois
- AC Repair in Illinois
- Heat Pump Installation in Illinois
- Heat Pump Repair in Illinois
- Ductless Mini-Split Installation in Illinois
- Emergency HVAC Repair in Illinois
- HVAC Tune-Up & Maintenance in Illinois
- Boiler Replacement in Illinois
- Air Duct Cleaning in Illinois
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