Free in-home estimates, written options and high-efficiency equipment set up correctly for Louisville's elevation.
Replacing a furnace in Louisville is a fifteen to twenty year decision. Historic mining-era homes in Old Town, 1970s through 1990s subdivisions, and newly rebuilt homes following the December 2021 Marshall Fire. Louisville is a small Boulder County city with a historic downtown, and part of the community has been rebuilding since the Marshall Fire. We bring a calculated, written proposal to every estimate, and we install with floor protection, clean venting and full commissioning before we leave.
In Old Town Louisville's historic homes, furnace work often means working around tight basements and older venting.
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.
Louisville sits at about 5,350 feet. Gas furnaces lose capacity with elevation, and many manufacturers specify derating or high-altitude kits. We follow those instructions and verify them on startup, which protects efficiency, the heat exchanger and your warranty.
| 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 Boulder, Broomfield, Erie and Westminster.
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.
