HVAC System Replacement Cost in Eugene, Oregon
Full HVAC system replacement in Eugene runs about $15,600 for a typical job. Basic installs start near $9,500. High-efficiency equipment with duct or electrical work can reach $20,600.
Eugene Weather and HVAC Load
In a normal year, Eugene racks up 4,615 heating and 292 cooling degree days (NOAA 1991-2020 normals). Heating is the bigger job here, and furnaces and heat pumps in Eugene put in far more hours than the air conditioner. Count on roughly 52 nights below 32°F and 18 afternoons past 90°F in a typical year. Snowfall averages about 3 inches. For a 2,000 sq ft house, this climate points to a heating load somewhere near 55,000 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 | 4,615 |
|---|---|
| Cooling degree days / year | 292 |
| Nights at or below 32°F | 52 |
| Days above 90°F | 18 |
| Average low / high | 41.9°F / 64.3°F |
Eugene Housing Stock
Census figures put the median build year in Eugene at 1979, so a typical house here has about 47 years on it. A lot of these homes are on their second or third system by now. The ductwork is usually original, and leaky joints are common. Owners live in 47.6% of occupied homes, roughly 36,000 households. Homes here have a median value of $435,400 and households a median income of $63,836. Those two numbers drive the labor adjustment in our estimate.
Lane County had 2 hail days and 1 day with damaging thunderstorm winds from 2020 through 2025, according to NOAA storm records. The largest hail reported was 1.25 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.
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
- Efficiency ratings: SEER2, AFUE and HSPF2
- Permits and electrical work
- Duct repair or replacement
- Equipment sized to the house and climate
- Furnace plus AC, or heat pump plus air handler
- Thermostat and zoning upgrades
We raised the national figures about 11% for Eugene 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
- New, matched heating and cooling equipment
- Startup, testing and warranty registration
- A load calculation and system design
- Duct connections and sealing
- Removing the old equipment
Oregon Permits, Efficiency Rules and Rebates
Oregon 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 Eugene generally need a mechanical permit, and a reputable contractor will pull it for you. Ask for their Oregon 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.
- Replacing both pieces at once usually costs less than two separate jobs a few years apart.
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HVAC System Replacement Questions from Eugene Homeowners
How much is full HVAC system replacement in Eugene?
Plan on $9,500 to $20,600, with most jobs near $15,600. Equipment efficiency, house size and the condition of the ducts and wiring decide where your quote falls.
When is the best time to schedule full HVAC system replacement in Eugene?
Between late spring and early fall. Eugene averages 52 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 Eugene
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Eugene Mahlon Sweet Airport; NOAA Storm Events Database 2020-2025, Lane County. Prices are our estimates, not contractor quotes. Updated 2026.