Furnace Replacement Cost Calculator
A planning range for a new installed furnace, based on published 2026 national cost ranges. 2026 dollars · Assumptions last reviewed October 2026.
What drives furnace replacement cost?
- Fuel type. Electric furnaces are cheapest to buy and install; oil furnaces are the most expensive. Gas and propane fall in the middle.
- Size. Larger-capacity units cost more, but the difference between neighboring sizes is modest.
- Efficiency. 90%+ condensing furnaces cost more and need PVC venting and a condensate drain (ENERGY STAR).
- Installation complexity. Attics, crawlspaces, relocations and fuel conversions add labor.
- Ductwork, removal and permits. Often quoted separately — ask what's included.
How accurate is this?
It starts from published 2026 national installed-cost ranges by furnace type (Angi, This Old House, Modernize) and uses your choices to place the estimate toward the low, middle or high part of that range — see the methodology. It is not a contractor quote. We don't adjust for your city because we haven't found defensible public data for local furnace labor rates. Your quotes may be higher in high-cost metro areas and lower elsewhere.
Tips for getting quotes
- Get at least two or three written quotes from licensed, insured contractors.
- Ask each to perform a Manual J load calculation rather than matching your old furnace's size.
- Confirm what's included: removal, permits, thermostat, venting, duct changes and warranty registration.
- Ask about utility rebates and current federal incentives for high-efficiency equipment.
Need a size first? Use the furnace size calculator.