AC Replacement in Centennial, CO
If your AC needs a big repair every summer or is past 12 years, replacing it on your terms beats an emergency swap in July. See 2026 costs, SEER guidance and the signs it's time.
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- Workmanship Warranty
- Upfront Pricing
- Serving the south Denver metro
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How Much Does AC Replacement Cost in Centennial, CO?
AC replacement in Centennial typically costs $5,000–$11,000 installed in 2026. A standard 15 SEER2 system sits at the low end; a high-efficiency 17+ SEER2 unit at the top. Pricing includes the condenser, coil, labor and permit. We serve 80112, 80111, 80121 and 80122 with free written estimates.
Prices vary by system, parts, and unit age. We confirm your exact price before any work begins.
2026 AC Replacement Price Ranges
| System type | Efficiency | Typical installed price | Best for |
|---|---|---|---|
| Standard central AC | 14–15 SEER2 | $5,000 – $7,500 | Budget-focused replacements |
| Mid-efficiency central AC | 16 SEER2 | $7,000 – $9,000 | Most Centennial homes |
| High-efficiency central AC | 17+ SEER2 | $9,000 – $11,000 | Hot-exposed or larger homes |
| Ductless mini-split | Varies | $4,500 – $9,000 | Homes without ductwork |
Installed ranges, not quotes. Financing available on approved credit.
Signs It’s Time to Replace Your AC
It’s over 12 years old. Older units use R-22 refrigerant, which is expensive and being phased out. A leak on an old system often costs more to recharge than the unit is worth.
Rising summer power bills. A tired AC works harder for less cooling. If your bills climb every July with no other change, the unit is losing efficiency.
Repeated repairs. Two or more repairs in two summers usually means more are coming. At some point repair money is better spent on a new, warrantied system.
Hail damage. Centennial gets real hail. A condenser with badly bent fins loses efficiency and may be cheaper to replace than repair, and your homeowner’s insurance may help.
Why Size and Altitude Matter Here
An AC that’s too big short cycles and never dehumidifies; one too small never keeps up on a 95-degree afternoon. We do a proper load calculation for your home rather than guessing from square footage, and we size for Centennial’s altitude and dry air, not a generic sea-level chart.
Related: AC repair if a fix will do · ductless AC · furnace replacement at the same time.
Adding AC to a Home That’s Never Had It
Not every AC job in Centennial is a swap. A fair number of older homes here were built with a furnace and ductwork but no air conditioning at all — window units did the job for decades. If your ducts are already sized reasonably, new AC installation is usually a straightforward tie-in to the existing furnace, not a bigger project than a replacement. If there’s no ductwork in the house, a ductless mini-split installation is typically the faster, cheaper route than retrofitting ducts into finished ceilings.
Either way — installing central air for the first time or replacing a unit that’s finally worn out — the sizing, permitting and altitude-adjusted setup are the same job done right. Tell us which one you’re facing and we’ll quote accordingly.
Related Pages
Replacing more than the AC, or comparing options?
How Service Works
Three easy steps — no runaround, no surprise pricing.
Call or Fill Out the Form
Tell us your system type, what it’s doing (or not doing), and your area or ZIP code.
Get an Upfront Quote First
We diagnose the real problem and give you a flat, written price before any work starts — so you decide, not us.
We Fix It — Often Same Day
A background-checked technician arrives, gets it running, and cleans up. Most repairs are done in one visit.
AC Replacement in Centennial, CO FAQs
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Explore Our Services
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.
Ready to Get Comfortable Again?
Skip the form — the fastest way to get help is a phone call. Tell us what your system is doing and we’ll give you a straight answer and an upfront price.
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