Free in-home estimates, written options and high-efficiency equipment set up correctly for Boulder's elevation.
Replacing a furnace in Boulder is a fifteen to twenty year decision. Historic homes near downtown, mid-century homes in south Boulder, and a significant number of rental properties. Boulder has some of the most ambitious local climate and electrification goals in Colorado, which shapes how many owners think about their next system. We bring a calculated, written proposal to every estimate, and we install with floor protection, clean venting and full commissioning before we leave.
Many Boulder owners repairing an older furnace also want to understand their electrification path, so we lay out the repair and the long-term option side by side.
Good installs are deliberate. We size the furnace with a load calculation, plan venting and drainage for Colorado winters, and protect your home throughout the job. After installation we verify gas pressure, temperature rise and combustion against the manufacturer's altitude guidance, set up the thermostat and register the warranty.
At about 5,400 feet, altitude setup is not optional. A new furnace that is not configured for elevation can run hot and wear early. We set and verify every Boulder install against the manufacturer's altitude guidance before we leave.
| Service | Typical range |
|---|---|
| 80% AFUE single-stage furnace, straightforward replacement | $5,500 to $7,500 |
| 95%+ AFUE two-stage furnace with variable-speed blower | $7,500 to $10,500 |
| Modulating premium furnace, zoning or communicating controls | $10,000 to $12,000+ |
| Furnace and central AC replaced together | $11,000 to $22,000+ |
Typical range, exact quote after free estimate. Financing available. Pairing with a heat pump may qualify for Xcel Energy and Colorado incentives.
For the full picture on furnace installation, including how we approach every job, see our furnace installation in Denver guide. Members of our Comfort Club get free diagnostics, repair discounts and front-of-line priority, and you can always reach us directly.
We also provide furnace installation in nearby Louisville, Erie, Broomfield and Golden.
Send a few details and we'll get back to you the same day with honest, upfront pricing. Heat or AC down right now? Call or text, we're on it.
We received your request and will reply the same day. Need us now? Call (720) 610-1289.
White-glove heating and cooling, honest pricing and a free estimate on every new system.
