Furnace Replacement Cost Guide
Estimate what a new furnace will cost installed based on fuel type, efficiency rating, home size, and any ductwork changes.
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Average cost
| Scenario | Range |
| Gas furnace (installed) | $3,000 – $6,000 |
| High-efficiency gas | $4,500 – $8,000 |
| Electric furnace | $2,000 – $4,500 |
| Oil furnace | $4,000 – $7,500 |
| With ductwork changes | $5,000 – $10,000 |
What affects the price
- Fuel type. Gas is common; oil and electric vary in price and running cost.
- Efficiency rating. Higher AFUE furnaces cost more upfront but save on energy.
- Furnace size. Bigger homes need higher-BTU units.
- Ductwork. New or modified ducts add cost.
- Labor and permits. Licensed HVAC installation and permits add to the total.
- Location. Climate and regional rates affect pricing.
FAQ
How much does a new furnace cost?
Installed, a gas furnace typically runs $3,000 to $6,000, more for high-efficiency or with ductwork.
Is a high-efficiency furnace worth it?
In colder climates, the energy savings and rebates often justify the higher upfront cost.
How long does a furnace last?
Most furnaces last 15 to 20 years with regular maintenance.
What size furnace do I need?
Sizing depends on square footage, climate, and insulation; an HVAC pro performs a load calculation.
Should I replace the AC at the same time?
If your AC is also old, replacing both together can save on labor and improve system matching.