HVAC Replacement Cost 2026: What Does a New System Cost?

Average HVAC Replacement Costs 2026

• Central AC unit only: $3,500–7,500 installed
• Gas furnace: $2,500–6,000 installed
• Heat pump (air source): $4,500–10,000 installed
• Full system (AC + furnace + coil): $7,000–15,000
• Mini-split (per zone): $1,500–4,000 per zone installed

What Drives HVAC Cost

• Efficiency rating (SEER2/AFUE): Higher-efficiency units cost 20–50% more upfront but reduce energy bills by 20–40%. Payback period: 5–10 years.
• System size (tonnage): Improperly sized systems fail faster. Proper Manual J load calculation is essential — avoid contractors who size "by rule of thumb."
• Ductwork condition: Leaky or improperly sized ducts add $1,000–5,000 for duct sealing or replacement.
• Brand tier: Economy (Goodman, Daikin): $3,500–6,000. Mid-range (Carrier, Lennox, Trane): $6,000–12,000. Premium: $12,000–20,000+.

Heat Pump vs. Furnace + AC

In mild climates (USDA zones 4+), heat pumps are more efficient than furnaces for heating. Cold climate heat pumps (down to -15°F) now work efficiently even in northern states. The IRA (Inflation Reduction Act) offers up to $2,000 in tax credits for heat pump installation through 2032 — a significant offset to higher upfront cost.