Furnace Replacement Cost in Chicago, Illinois
Furnace replacement in Chicago runs about $6,600 for a typical job. Basic installs start near $3,700. High-efficiency equipment with duct or electrical work can reach $9,000.
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Chicago Weather and HVAC Load
In a normal year, Chicago racks up 6,017 heating and 861 cooling degree days (NOAA 1991-2020 normals). Heating is the bigger job here, and furnaces and heat pumps in Chicago put in far more hours than the air conditioner. Count on roughly 96 nights below 32°F and 13 afternoons past 90°F in a typical year. Snowfall averages about 39 inches. For a 2,000 sq ft house, this climate points to a heating load somewhere near 65,000 BTU/h. Treat that as a starting number. A Manual J calculation will move it up or down based on insulation and windows.
| Heating degree days / year | 6,017 |
|---|---|
| Cooling degree days / year | 861 |
| Nights at or below 32°F | 96 |
| Days above 90°F | 13 |
| Average low / high | 44.1°F / 57.4°F |
Chicago Housing Stock
The median Chicago home dates to 1952, according to the Census ACS. That makes the typical house about 74 years old. Houses that old often still have duct runs sized for an old coal or oil furnace and 60- or 100-amp electrical panels. Both can add cost when new equipment goes in. About 522,000 households here own their home, 45.5% of the occupied total. The median home value is $315,200, and median household income is $75,134. We use both figures to adjust labor and pricing for this page.
NOAA storm reports for Cook County show 27 hail days and 75 days with damaging thunderstorm winds over the six years from 2020 to 2025. The largest hail reported was 2.75 inches across. Hail flattens the thin aluminum fins on condenser coils and cuts airflow. After a big storm, take a look at the outdoor unit; homeowners insurance often covers the damage. Cook County also had 8 tornado days in that period.
When Replacement Makes Sense
- The furnace is 15 to 20 years old or more
- A repair quote runs past a third of the cost of a new unit
- Some rooms stay cold, the burner short-cycles, or the ignitor keeps failing
- Gas or electric bills keep climbing even though usage hasn't changed
What Moves the Price
- Condition of the existing ductwork and any changes it needs
- BTU size, which should come from a Manual J load calculation
- Single-stage, two-stage or modulating gas valve
- AFUE rating: a basic 80% unit vs. a 96% condensing furnace
- New PVC venting if you move to a condensing model
- Permit and inspection fees, which the local building department sets
We raised the national figures about 16% for Chicago using local income, home values and the equipment size this climate needs. Real bids can still come in outside the range, so collect three written quotes.
What the Quote Should Cover
- The permit and the manufacturer warranty registration
- Gas line and vent connections
- The new furnace, filter rack and thermostat wiring
- Combustion and safety tests
- Removing and hauling away the old furnace
Illinois Permits, Efficiency Rules and Rebates
Illinois falls in the DOE's North region. New split central air conditioners must meet at least 13.4 SEER2, and heat pumps sold anywhere in the U.S. need 14.3 SEER2 and 7.5 HSPF2. Plan on a mechanical permit for most replacements in Chicago; the contractor normally pulls it. Before you sign, ask each bidder for their Illinois license or registration number and proof of insurance. The federal 25C tax credit ended for equipment installed after December 31, 2025, so incentives now come mostly from utilities and state programs. Check your electric and gas utility's rebate page before you pick equipment.
Before You Hire
- Replace it in early fall if you can. A no-heat emergency in January costs more and leaves you fewer choices.
- Look up utility rebates on 95%+ AFUE units before you buy.
- Make sure all three quotes are for the same AFUE and staging, or you can't compare them.
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Furnace Replacement Questions from Chicago Homeowners
How much is furnace replacement in Chicago?
Plan on $3,700 to $9,000, with most jobs near $6,600. Equipment efficiency, house size and the condition of the ducts and wiring decide where your quote falls.
When is the best time to schedule furnace replacement in Chicago?
Between late spring and early fall. Chicago averages 96 freezing nights a year, and heating calls spike from November through February.
How long does a furnace replacement take?
A straight swap is usually done in one day, somewhere between 4 and 10 hours. Moving to a condensing furnace with new PVC venting can add a few more.
Is a high-efficiency furnace worth it?
In cold climates, a 95%+ AFUE furnace usually earns back the price difference in lower gas bills. Where winters are mild, the payback can take a very long time.
Furnace Replacement Near Chicago
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Chicago Northerly Island; NOAA Storm Events Database 2020-2025, Cook County. Prices are our estimates, not contractor quotes. Updated 2026.