Furnace Replacement Cost (2026): $4,500–$10,500

2026 furnace replacement cost: median $6,800 for an 80–100k BTU gas furnace. AFUE, venting, and what changes the price.

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HomeScore forecasts repairs, replacement timing, and total ownership cost across 40+ home systems. Used by 8,200+ buyers, sellers, and long-term homeowners in 2026.