Cost guide · HVAC
How much does furnace replacement cost in 2026?
Typical range
$4,500 – $13,500
installed (residential gas furnace)
Residential gas furnace replacement runs $4,500–$13,500 installed in 2026, with most operators quoting $5,500–$7,500 for an 80% AFUE system. High-efficiency 95–96% AFUE condensing furnaces run $7,500–$10,000; modulating-condensing 96%+ systems run $9,500–$13,500.
Why the range is wide
Pricing depends primarily on AFUE rating (efficiency), BTU capacity (sized to home heat load), and venting requirements. 80% AFUE single-stage gas runs $4,500–$6,500. 95-96% AFUE condensing runs $7,500–$10,000 (requires additional PVC venting). Modulating-condensing 96%+ furnaces with variable-speed blower run $9,500–$13,500.
Factors that affect price
AFUE rating
80% AFUE: base price. 95-96% (condensing): +$2,500–$3,500. 96%+ modulating: +$4,500–$6,000. High AFUE pays back faster in cold climates.
BTU capacity
60K BTU (1,500 sq ft home): $4,500–$6,500. 80K BTU (2,000 sq ft): $5,000–$7,500. 100K+ BTU (large home): $6,500–$10,500.
Fuel type
Gas: pricing above. Oil: similar pricing but limited remaining market. Electric: $1,500–$3,500 (resistance), $7,500–$15,000 (heat pump) — see heat-pump-replacement-cost.
Venting upgrade
80% AFUE uses metal flue (existing). 95%+ requires PVC venting (new). Add $400–$900 for venting reroute.
Gas line condition
If existing gas line is undersized for the new furnace, add $300–$800 for upgrade.
Region
Cold-climate states (MN, WI, ND, MT, NY): higher install volume, better pricing per unit. Warm-climate states see rare furnace installs at premium pricing.
Regional variation
Northeast and Midwest carry the bulk of US furnace replacement volume, which keeps pricing competitive. In milder climates (CA, FL, TX), homeowners increasingly replace gas furnaces with heat pumps under federal incentives — see heat-pump-replacement-cost.
DIY vs pro
Furnace replacement is not a DIY job: gas connections, combustion venting, and code sign-off require a licensed HVAC contractor. Homeowner scope is limited to filter changes and thermostat programming — anything involving the gas line, heat exchanger, or venting needs a permit and a pro.
Furnace replacement — frequently asked
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