Free in-home estimates, written options and high-efficiency equipment set up correctly for Thornton's elevation.
Planning a new furnace in Thornton? Start with what is already in the house. Some of the metro's earliest planned post-war homes in the south of the city, and newer subdivisions to the north. Thornton started as a planned post-war community in the 1950s and has grown steadily north ever since. Our free estimates include a room-by-room load calculation, a duct review and clear options from standard to premium.
Thornton's original homes often have furnaces in small closets, which limits replacement options and makes sizing and access important.
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 5,300 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 Thornton 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 Westminster, Broomfield, Erie and Arvada.
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.
