Furnace Replacement Cost in Centennial, CO
Wondering what a new furnace really costs in Centennial? Here are honest 2026 installed price ranges, what moves the number, and how to tell repair from replacement, before anyone quotes you.
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How Much Does Furnace Replacement Cost in Centennial, CO?
Furnace replacement in Centennial typically runs $4,500–$12,000 installed in 2026. A standard 80% unit sits at the low end; a high-efficiency 95%+ model at the top. Home size, ductwork and altitude setup decide the figure. We serve 80112, 80111, 80121 and 80122 with free written quotes.
Prices vary by system, parts, and unit age. We confirm your exact price before any work begins.
2026 Furnace Replacement Price Breakdown
| Furnace type | Efficiency (AFUE) | Typical installed price | Best for |
|---|---|---|---|
| Single-stage, standard | 80% | $4,500 – $7,000 | Tight budgets, milder-use homes |
| Two-stage, mid-efficiency | 90–92% | $6,500 – $9,500 | Most Centennial homes |
| Modulating, high-efficiency | 95–98% | $8,000 – $12,000 | Larger homes, lowest gas bills |
| Furnace + AC coil combo | Varies | Add $1,200 – $2,500 | Replacing both at once |
Installed ranges, not quotes. Your written estimate may differ based on your home. Financing available on approved credit.
What’s Included in That Price
Every replacement quote covers the furnace unit, full removal and disposal of the old one, labor, the Arapahoe County permit, and a startup safety check. If your gas line, venting or thermostat needs work, we tell you before we start, not after.
What Changes Your Furnace Replacement Cost
Home size and capacity. A 1,400 sq ft ranch near Cherry Knolls needs far less furnace than a 3,500 sq ft two-story out by Piney Creek. Bigger output costs more.
Efficiency rating. A 95% unit costs more up front but burns less gas every long Centennial winter. Over 15 years that gap often pays for itself.
Altitude setup. At 5,800 feet a furnace must be derated and its combustion adjusted, or it runs rich and wastes fuel. A cheaper out-of-area bid that skips this costs you on every gas bill.
Ductwork condition. Undersized or leaking ducts mean uneven heat no matter how good the furnace. Repairs add cost but stop you paying for heat that escapes.
Venting changes. High-efficiency units vent through PVC, not the old metal flue. Switching from an 80% unit sometimes means new venting, a real cost worth knowing early.
Repair or Replace? When Replacement Saves Money
The rule we give Centennial homeowners: if the repair costs more than half the price of a new unit, and the furnace is over 12 years old, replacement usually wins. Signs it’s time include rising gas bills two winters running, uneven heat, a cracked heat exchanger (a safety issue, never ignore it), or three or more repairs in two years. Our guide on whether to repair or replace walks through the full decision.
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Furnace Replacement Cost in Centennial, CO FAQs
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Areas We Serve
Southglenn
The Streets at SouthGlenn and the older streets around it.
Willow Creek
Established homes east of Quebec, many original systems.
Piney Creek
Eighties and nineties builds, ducts worth checking.
Foxridge
Split-levels where upstairs never quite cools.
Smoky Hill
East Centennial, 80015 and 80016.
Walnut Hills
Mature trees, mature furnaces.
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