HVAC System Replacement Cost in Pontiac, Michigan
Expect to pay $8,400 to $18,200 for full HVAC system replacement in Pontiac, MI. Most homeowners end up near $13,800, depending on the equipment tier and how much of the old setup can be reused.
Compare Free Quotes in Pontiac
Pontiac Weather and HVAC Load
Pontiac logs 6,474 heating degree days and 720 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 Pontiac put in far more hours than the air conditioner. A normal year brings 135 nights at or below freezing and 10 days over 90°F. Snowfall averages about 36 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 | 6,474 |
|---|---|
| Cooling degree days / year | 720 |
| Nights at or below 32°F | 135 |
| Days above 90°F | 10 |
| Average low / high | 40.2°F / 58°F |
Pontiac Housing Stock
Half the homes in Pontiac were built before 1960 (Census ACS median), so the typical house is about 66 years old. A lot of these homes are on their second or third system by now. The ductwork is usually original, and leaky joints are common. About 11,000 households here own their home, 44.2% of the occupied total. Homes here have a median value of $110,600 and households a median income of $42,791. Those two numbers drive the labor adjustment in our estimate.
Oakland County had 9 hail days and 41 days with damaging thunderstorm winds from 2020 through 2025, according to NOAA storm records. The largest hail reported was 1.25 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. Oakland County also had 4 tornado days in that period.
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
What Moves the Price
- Duct repair or replacement
- Thermostat and zoning upgrades
- Efficiency ratings: SEER2, AFUE and HSPF2
- Furnace plus AC, or heat pump plus air handler
- Permits and electrical work
- Equipment sized to the house and climate
We kept the national figures close to unchanged for Pontiac 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
- Removing the old equipment
- A load calculation and system design
- Duct connections and sealing
- New, matched heating and cooling equipment
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 Pontiac 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
- 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.
- Get one quote for a heat pump system and one for a furnace plus AC.
Get Free HVAC System Replacement Quotes in Pontiac
Tell us where you are and up to three licensed local pros will get in touch. You don't have to hire any of them.
HVAC System Replacement Questions from Pontiac Homeowners
How much is full HVAC system replacement in Pontiac?
Plan on $8,400 to $18,200, with most jobs near $13,800. 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 Pontiac?
Between late spring and early fall. Pontiac averages 135 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 Pontiac
- Rochester Hills $11,800 to $25,700
- Troy $11,900 to $26,000
- Novi $11,900 to $25,800
- Taylor $8,500 to $18,500
- Kalamazoo $8,400 to $18,200
- Dearborn Heights $8,800 to $19,300
- Southfield $9,500 to $20,600
- Royal Oak $10,500 to $22,900
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Pontiac Wastewater Plant; NOAA Storm Events Database 2020-2025, Oakland County. Prices are our estimates, not contractor quotes. Updated 2026.