HVAC Cost Guide
Furnace Replacement Cost
Furnace replacement can involve heating equipment, venting, gas piping, electrical, thermostat controls, air filtration, permits, and compatibility with the AC or heat pump.
Cost planning ranges
The total depends on furnace size, fuel type, efficiency, blower type, venting changes, access, ductwork, permits, and whether other HVAC components are replaced. These figures are planning ranges, not contractor quotes. Final pricing depends on the home, materials, labor, access, permits, and the written scope.
For broader planning, compare the HVAC hub and calculator, AC replacement cost guide, furnace replacement cost guide, heat pump replacement cost guide, HVAC sizing guide, and HVAC financing guide.
Basic gas furnace
$4,000-$7,500+
Standard efficiency and straightforward replacement conditions.
High-efficiency furnace
$6,500-$11,500+
Condensing equipment, venting changes, and drainage can add cost.
Furnace plus AC coordination
$8,000-$16,000+
May include coil, controls, blower compatibility, or matched system work.
Complex installation
$10,000-$18,000+
Duct, vent, gas, electrical, access, or code corrections can increase scope.
What affects the price?
Good estimates explain the scope and assumptions, not just the total. Use these factors to compare written quotes more clearly.
Heating load, BTU capacity, and fuel type
Standard, two-stage, variable-speed, or high-efficiency equipment
Venting, combustion air, condensate drain, gas line, and electrical needs
Ductwork, filter cabinet, return air, and airflow balance
Compatibility with existing AC coil or future cooling plans
Permits, warranty terms, rebates, and financing
Repair or replace the furnace?
Evaluate system age, safety, repair cost, comfort, utility use, and whether the AC or ductwork needs attention too.
Repair may fit when
Repair may work for a newer furnace with an isolated igniter, sensor, blower, thermostat, or minor component issue.
Replacement may fit when
Replacement may be prudent for older equipment, cracked heat exchanger concerns, repeated repairs, or major venting and comfort issues.
Compare Scope Before Price
Get estimates with the same details in writing
Use this guide to organize questions, then request local estimates that spell out materials, labor, permits, warranty, and exclusions.
Furnace estimate checklist
Keep notes from each contractor in the same format. It makes pricing, warranty, timeline, and scope differences easier to spot.
Ask for furnace model, efficiency, BTU capacity, and blower type
Confirm venting, condensate, gas, and electrical requirements
Ask whether the AC coil or thermostat must be updated
Review ductwork, return air, and filtration recommendations
Compare warranties, permits, rebates, and exclusions
Request written repair vs replacement options when possible
HVAC Resources
Related guides and calculators
Keep the next step close, whether you are comparing costs, system choices, warranties, or local estimates.
Furnace Replacement Cost FAQ
How much does furnace replacement cost?
Many furnace replacements fall between $4,000 and $11,500 or more. High-efficiency equipment, venting changes, ductwork, access, and code needs can raise the total.
How long does a furnace last?
Many furnaces last around 15 to 25 years, but lifespan depends on installation, maintenance, usage, fuel type, airflow, and operating conditions.
Is a high-efficiency furnace worth it?
It depends on climate, fuel rates, home insulation, venting requirements, rebates, and how long you plan to own the home. Compare installed cost and expected operating cost.
Can I replace only the furnace and keep the AC?
Often yes, but the coil, blower, controls, and airflow must be compatible. Ask whether keeping the AC creates future cost or warranty issues.
What furnace issues are urgent?
No heat in cold weather, suspected carbon monoxide, gas smell, flame rollout, or cracked heat exchanger concerns should be handled promptly by qualified professionals.
Next Step
Compare HVAC estimates
Return to the estimate form or use the HVAC calculator to organize the project before comparing quotes.