Calculator
Furnace Replacement Cost Calculator
Estimate what a furnace replacement should cost by output, efficiency and venting work.
Verified August 2026
Select a state to re-price the estimate with local labor and material costs.
Estimated installed cost
$4,677 – $6,644
- Furnace and labor
- $4,800
- Venting work
- $0
- Removal and permit
- $515
Estimates only. Local pricing, site conditions and code requirements change the real number.
The formula
Cost = base unit cost x efficiency multiplier + venting + removal + permit
High-efficiency condensing furnaces (90%+ AFUE) need new PVC venting and a condensate drain, which is why the jump from 80% to 96% AFUE costs more than the equipment difference alone.
Worked example
An 80,000 BTU 96% AFUE gas furnace with new venting typically runs $5,200 to $7,600 installed.
Frequently asked questions
How much is a new furnace installed?
Most homeowners pay $4,000 to $8,500 for a replacement gas furnace in 2026. Electric furnaces are cheaper to install but cost far more to run.
How long does a furnace last?
15 to 20 years for a gas furnace with annual service. Past year 15, repairs over about $1,500 usually favor replacement.
Price this job in your state
Same tool, re-priced with local labor, material and permit-fee indexes.
Sources
Sources & verification
Last verified August 2026. Cost figures are modeled estimates based on national baselines adjusted for local labor and material pricing — they are not quotes. Permit rules change; confirm with the building department before starting work.