US calculator
Furnace Replacement Cost Calculator
Estimate installed US furnace replacement costs by capacity, fuel, efficiency, installation scope, and selected upgrades.
How this estimate is calculated
Fuel type supplies the installed furnace project allowance, while BTU capacity adds only a modest sizing component calibrated around an 80,000 BTU normal replacement. The full project cost is not multiplied by BTU. Efficiency adjusts the installed subtotal; installation changes and selected removal, permit, controls, ductwork, and utility work remain fixed allowances.
This is a planning estimate, not a contractor quote. Actual contractor quotes vary by location, specification, site conditions, labour, and project requirements.
Useful cost information
Planning assumptions
- This estimates furnace replacement, not a complete heating-and-cooling system replacement.
- Complete duct replacement is not included.
- Capacity must be confirmed through an appropriate heating-load calculation.
Data sources & methodology
Angi — How Much Does a New Furnace Cost? [2026 Data], updated September 2026
Last reviewed: 2026-09
Helpful guides
Furnace Replacement Cost Guide: Equipment, Efficiency and Installation
The shared calculator route contains two different projects: US forced-air furnace replacement and UK boiler replacement, each with separate cost drivers.
Repair or Replace Your Furnace? Age, Efficiency, Warning Signs and Costs
Age, comfort problems, and unusual operation can trigger evaluation, but they do not remotely diagnose a furnace or boiler or dictate replacement.
Central AC Replacement Cost Guide: System Size, Efficiency and Installation
A cooling-only replacement budget should account for matched equipment, distribution, controls, utilities, access, removal, approvals, and commissioning—not just the outdoor unit.
Boiler Replacement Cost Guide: Boiler Type, Size and Installation
The US calculator models hydronic boiler replacement; the UK calculator models wider boiler installation, conversion, relocation, and heating-system upgrades.
Repair or Replace a Boiler? Age, Efficiency, Problems and Cost Comparison
Boiler age and operating problems can trigger evaluation, but they do not remotely diagnose a fault or determine whether repair or replacement is financially preferable.