Heating & Cooling · Costs, budgets and timelines · Updated November 2026
Furnace Replacement Cost: Like-for-Like vs. Fuel Conversion
Replacing a furnace with the same type of system usually costs $2,819–$6,878, according to HomeAdvisor. Switching fuel types (for example, electric to gas) adds gas lines, venting and other work, and can cost far more.
Like-for-like replacement
| Furnace type | Typical installed cost |
|---|---|
| Electric | $2,000–$7,000 |
| Natural gas | $3,800–$10,000 |
| Oil | $6,750–$10,000+ |
| Old furnace removal and disposal | $60–$330 |
From HomeAdvisor's furnace replacement cost guide.
Like-for-like jobs reuse the existing fuel supply, venting (if still up to code) and ductwork, which keeps costs down.
Fuel and system conversions
| Conversion | Typical cost | What gets added |
|---|---|---|
| Electric to gas | $5,000–$15,000 | New furnace, gas line and venting |
| Heat pump to gas furnace | $1,000–$5,500 plus possible gas, venting and duct work | Gas supply and venting |
| Boiler to furnace | $2,000–$6,000 plus ductwork | Ducts and vents if none exist |
| Relocating a furnace | $1,000–$20,000+ | Rerouting ducts, gas and electrical |
From HomeAdvisor.
Items to check in any quote
- A load calculation instead of matching the old furnace's size.
- Efficiency (AFUE) rating and model number.
- Venting: high-efficiency gas furnaces vent through plastic pipe; older chimneys may need a liner if a water heater still uses them.
- Gas line sizing, electrical connections and a new thermostat if needed.
- Duct condition and any sealing (duct sealing vs. replacement).
- Permit, warranty registration and annual maintenance ($100–$300 per year).
Considering a heat pump instead? See heat pump vs. AC and furnace.
Sources
- HomeAdvisor: Furnace replacement cost, accessed November 2026
Cost figures are national ranges from the sources listed above and in our heating & cooling cost guide, not a quote from FixFinch or any contractor. Calls connect you with an independent service provider in our network. FixFinch is not a contractor and does not perform the work.