Furnace Replacement Cost (2026 Guide)
Quick answer
Most homeowners pay about $4,000 to $10,000 to replace a gas furnace in 2026, including the unit, labor, materials and permits. A straight swap of a standard-efficiency furnace is often $3,000 to $8,000. High-efficiency furnaces, duct changes or hard-to-reach locations can push the cost above $10,000.
A furnace usually fails at the worst time, on the coldest night of the year. Knowing the normal price range ahead of time helps you make a calm decision instead of a rushed one.
Furnace replacement cost by type
| Furnace type | Efficiency (AFUE) | Typical installed cost |
|---|---|---|
| Standard gas furnace | 80% | $3,000 – $7,000 |
| High-efficiency gas furnace | 90% – 98% | $5,000 – $10,000+ |
| Electric furnace | Close to 100% at the unit | $2,500 – $7,000 |
AFUE tells you how much of the fuel becomes heat in your home. A 95% furnace turns 95 cents of every gas dollar into heat. High-efficiency models cost more but save more on gas in cold climates.
What adds to the cost
- New venting: high-efficiency furnaces need PVC intake and exhaust pipes and a condensate drain.
- Ductwork changes: repairs or resizing can add a lot to the bill.
- Hard access: furnaces in attics or tight closets take more labor.
- Fuel conversion: switching from oil or electric to gas needs a gas line and permits.
- Replacing the AC at the same time: often saves on labor. See our AC replacement cost guide.
Signs you need a new furnace
- The furnace is 15 to 20 years old or older
- Repairs are getting more frequent and more expensive
- Some rooms are always cold
- Heating bills keep rising
- You smell gas or see a yellow burner flame. Leave the house and call your gas company right away.
How to get a fair quote
- Ask for a load calculation so the furnace is the right size.
- Get at least three itemized quotes with the brand, model and AFUE rating.
- Ask about utility rebates and federal tax credits for efficient equipment. Check energy.gov for current rules.
- Confirm permits, removal of the old unit and the warranty are included.
Frequently asked questions
How long does a furnace last?
Most gas furnaces last about 15 to 20 years with regular maintenance.
How long does installation take?
A straight replacement usually takes one day. Jobs with new venting or ductwork can take two to three days.
Sources: Carrier, Inch Calculator, Budget Heating. Prices are national planning ranges, not quotes. See how we research costs.
