How much does an HVAC system cost in Castle Rock?
Most Castle Rock and south Denver Metro homeowners pay $8,500–$14,500 to replace a central AC, or $6,500–$11,500 to replace a furnace — each range is for that one system on its own, not both together. Dual-fuel packages after rebates typically land $18,500–$23,500. Your exact number depends on system type, efficiency, ducts, and home size.
Central AC replacement
$8,500 – $14,500
Furnace replacement
$6,500 – $11,500
Each range is one system installed on its own — replacing both together is quoted separately.
Most installs: 1 day · dual-fuel / duct / electrical: up to 2 days
No-obligation estimate · Honest pricing before any work begins
What does each HVAC system type cost?
Installed price ranges for Castle Rock and the south Denver Metro. Your estimate depends on your home — the considerations below explain what moves it.
Central AC
Installed replacement for a typical Front Range home — equipment, labor, and haul-away.
$8,500 – $14,500
Gas Furnace
High-efficiency gas furnace installed and commissioned for Colorado winters.
$6,500 – $11,500
Dual-Fuel Heat Pump + Furnace
After rebatesCold-climate heat pump with gas-furnace backup — heating and cooling in one package.
$18,500 – $23,500
Ductless Mini-Split
Per zonePer-zone pricing. Multi-zone systems scale with the number of indoor heads.
Starting at $9,000
Ranges are representative Front Range market estimates for Colorado Bear jobs. Dual-fuel pricing is shown after typical qualifying rebates. You get a personalized written estimate — and we explain what affects it — before any work begins.
What affects your HVAC system price
System type & efficiency tier
A code-minimum single-stage unit costs less up front than a variable-speed, high-SEER2 / cold-climate system — but the efficient tier lowers monthly bills and often unlocks utility rebates.
Ductwork condition
Leaky, undersized, or missing ducts add cost. Ductless mini-splits skip ductwork entirely, which can be the smarter path in additions or older homes.
Electrical & gas readiness
A heat pump may need panel or circuit capacity. A new furnace may need venting or gas-line work. We call that out before you commit.
Home size & load
Square footage, insulation, windows, and elevation determine the tonnage you actually need — use our HVAC Size Calculator, then we confirm with Manual-J on site.
Spread the cost over time
Special financing available — apply in minutes. Qualified homeowners can finance into affordable monthly payments — and still lock today’s installed price.
Frequently asked questions
Installed ranges. They reflect typical south Denver Metro jobs — equipment, labor, haul-away of the old system, and standard startup. Unusual duct, electrical, or structural work is quoted separately so there are no surprises.
That range assumes common Xcel Energy and related incentives are applied to a qualifying dual-fuel / heat-pump package. Final rebate amounts depend on your utility account, equipment model, and program year — we verify eligibility on your estimate.
A straightforward AC or furnace replacement is usually a one-day job. Dual-fuel conversions, ductwork, or electrical upgrades can take up to two days. We confirm the timeline in your written estimate.
Yes. Qualified homeowners can apply for Synchrony financing — often with promotional options that keep comfort within reach while locking today’s price.
Get your HVAC system estimate
No pressure, no surprises. Talk to a real Colorado Bear technician — you’ll get a clear, upfront price before any work begins.
5.0★ rating from 200+ verified reviews
Factory-Authorized Daikin Dealer
Same-day & 24/7 emergency service