HVAC System Replacement Cost in Dearborn, Michigan
Our 2026 estimate for full HVAC system replacement in Dearborn, MI is $9,100 to $19,900. That puts Dearborn 8% above the national average, mainly because of lower local labor costs and the bigger heating equipment this climate calls for.
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Dearborn Weather and HVAC Load
In a normal year, Dearborn racks up 6,365 heating and 735 cooling degree days (NOAA 1991-2020 normals). Heating is the bigger job here, and furnaces and heat pumps in Dearborn put in far more hours than the air conditioner. On average, Dearborn gets 136 freezing nights and 16 days above 90°F per year. Snowfall averages about 31 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 | 735 |
| Nights at or below 32°F | 136 |
| Days above 90°F | 16 |
| Average low / high | 40°F / 59°F |
Dearborn Housing Stock
Half the homes in Dearborn were built before 1952 (Census ACS median), so the typical house is 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 25,000 households here own their home, 68.2% of the occupied total. The median home value is $205,900, and median household income is $65,192. We use both figures to adjust labor and pricing for this page.
NOAA storm reports for Wayne County show 5 hail days and 30 days with damaging thunderstorm winds over the six years from 2020 to 2025. The largest hail reported was 1.5 inches across. Storms here are more likely to cause power surges than coil damage, so a surge protector on the outdoor unit is worth the small cost. Wayne County also had 2 tornado days in that period.
When Replacement Makes Sense
- Both the heating and cooling equipment are 15 years old or more
- Some rooms are uncomfortable, and the energy bills are high
- An old R-22 AC paired with an aging furnace
What Moves the Price
- Permits and electrical work
- Efficiency ratings: SEER2, AFUE and HSPF2
- Duct repair or replacement
- Furnace plus AC, or heat pump plus air handler
- Equipment sized to the house and climate
- Thermostat and zoning upgrades
We raised the national figures about 8% for Dearborn 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
- A load calculation and system design
- Removing the old equipment
- Duct connections and sealing
- New, matched heating and cooling equipment
- Startup, testing and warranty registration
Michigan Permits, Efficiency Rules and Rebates
Michigan 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. Equipment replacements in Dearborn generally need a mechanical permit, and a reputable contractor will pull it for you. Ask for their Michigan license or registration number and a certificate of insurance with the quote. 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
- Replacing both pieces at once usually costs less than two separate jobs a few years apart.
- Make every bidder quote the same efficiency ratings, or the prices won't compare.
- Ask for a duct leakage test. Leaky ducts can lose 20 to 30% of what the system puts out.
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HVAC System Replacement Questions from Dearborn Homeowners
How much is full HVAC system replacement in Dearborn?
Plan on $9,100 to $19,900, with most jobs near $15,000. 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 Dearborn?
Between late spring and early fall. Dearborn averages 136 freezing nights a year, and heating calls spike from November through February.
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.
HVAC System Replacement Near Dearborn
- Dearborn Heights $8,800 to $19,300
- Lansing $8,400 to $18,300
- Livonia $10,700 to $23,300
- Ann Arbor $10,900 to $23,800
- Troy $11,900 to $26,000
- Sterling Heights $9,900 to $21,600
- Farmington Hills $11,200 to $24,400
- Warren $8,900 to $19,300
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Dearborn; NOAA Storm Events Database 2020-2025, Wayne County. Prices are our estimates, not contractor quotes. Updated 2026.