Furnace Replacement Cost Guides

Jessica Martinez
By Jessica Martinez, Contributing Writer, Business & Finance
Updated 2026-07-08

Seven guides, each built around one decision homeowners face before signing an HVAC contract: which fuel to pick, whether efficiency upgrades pencil out, how a bundled AC job compares to doing it separately, and how to tell a fair labor line item from a padded one. Start with whichever question matches where you are in the process, and run the numbers on the calculator when you are ready for a figure tied to your ZIP code.

Furnace Replacement Cost in 2026: What to BudgetMost homeowners spend $3,500 to $5,500 on a mid-range gas unit installed in 2026. Here is what drives the price up and the ways to pull it back down.Gas vs Electric Furnace Replacement Cost: Full Comparison (2026)Gas runs $2,800 to $6,500 installed; electric starts lower at $1,500 to $4,000 but costs more to operate. The 10-year math usually favors gas in cold climates.High-Efficiency Furnace Cost: Is the Upgrade Worth It in 2026?A 96% AFUE furnace costs $400 to $1,200 more than a standard 80% model. Federal tax credits and lower gas bills typically recover that premium in four to eight years.Furnace and AC Replacement Cost: Bundle vs Separate in 2026Replacing both at once runs $5,000 to $12,000 installed and saves $1,000 to $2,500 in labor over two separate jobs. The case for bundling gets stronger when both units are old.Furnace Installation Cost: Labor, Permits, and What to Expect in 2026Labor alone runs $800 to $2,000 for a standard swap. New venting, gas line work, or ductwork changes push it higher. Here is what each line item should cost.Signs You Need a New Furnace: 8 Warning Signals to Watch in 2026Age over 15 years, a yellow burner flame, and two or more service calls in two years are the clearest signals. Repair costs on old units add up faster than most people expect.How Long Does a Furnace Last? Lifespan by Type and Maintenance (2026)Gas furnaces average 15 to 20 years; electric units reach 20 to 30. Annual tune-ups and regular filter changes are the two things that most reliably push a unit toward the long end.