HVAC System Replacement Cost in Evanston, Illinois
Our 2026 estimate for full HVAC system replacement in Evanston, IL is $11,500 to $25,000. That puts Evanston 35% above the national average, mainly because of higher incomes and home values, which push labor rates up and the bigger heating equipment this climate calls for.
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Evanston Weather and HVAC Load
Evanston logs 6,365 heating degree days and 805 cooling degree days in a normal year, based on the closest NOAA weather station. Heating is the bigger job here, and furnaces and heat pumps in Evanston put in far more hours than the air conditioner. Count on roughly 128 nights below 32°F and 17 afternoons past 90°F in a typical year. Snowfall averages about 34 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 | 6,365 |
|---|---|
| Cooling degree days / year | 805 |
| Nights at or below 32°F | 128 |
| Days above 90°F | 17 |
| Average low / high | 40.3°F / 59°F |
Evanston Housing Stock
The median Evanston 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 18,000 households here own their home, 55.8% of the occupied total. The median home value is $472,300, and median household income is $95,766. We use both figures to adjust labor and pricing for this page.
Cook County had 27 hail days and 75 days with damaging thunderstorm winds from 2020 through 2025, according to NOAA storm records. 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
- An old R-22 AC paired with an aging furnace
- Both units keep needing repairs
- Some rooms are uncomfortable, and the energy bills are high
What Moves the Price
- Permits and electrical work
- Equipment sized to the house and climate
- Thermostat and zoning upgrades
- Efficiency ratings: SEER2, AFUE and HSPF2
- Furnace plus AC, or heat pump plus air handler
- Duct repair or replacement
We raised the national figures about 35% for Evanston 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
- Startup, testing and warranty registration
- Duct connections and sealing
- New, matched heating and cooling equipment
- Removing the old equipment
- A load calculation and system design
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. Expect the contractor to pull a mechanical permit for a replacement job in Evanston. If a bidder suggests skipping it, move on. Also ask for a 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
- Ask for a duct leakage test. Leaky ducts can lose 20 to 30% of what the system puts out.
- Replacing both pieces at once usually costs less than two separate jobs a few years apart.
- Get one quote for a heat pump system and one for a furnace plus AC.
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HVAC System Replacement Questions from Evanston Homeowners
How much is full HVAC system replacement in Evanston?
Plan on $11,500 to $25,000, with most jobs near $18,900. Equipment efficiency, house size and the condition of the ducts and wiring decide where your quote falls.
When is the best time to schedule full HVAC system replacement in Evanston?
Between late spring and early fall. Evanston averages 128 freezing nights a year, and heating calls spike from November through February.
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.
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.
HVAC System Replacement Near Evanston
- Skokie $10,900 to $23,700
- Schaumburg $10,700 to $23,300
- Arlington Heights $11,700 to $25,600
- Bloomington $9,300 to $20,200
- Bolingbrook $10,800 to $23,600
- Cicero $9,200 to $19,900
- Decatur $8,000 to $17,400
- Waukegan $9,300 to $20,300
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 Botanic Garden; NOAA Storm Events Database 2020-2025, Cook County. Prices are our estimates, not contractor quotes. Updated 2026.