HVAC Replacement Cost Calculator: 2026 AC, Furnace & Heat Pump Prices
A full HVAC replacement runs $6,500-$14,500 in 2026 for the average US home. This guide breaks down real 2026 pricing for AC, furnaces, heat pumps, and mini-splits — plus what SEER2, tonnage, and ductwork add to the bottom line.
HVAC pricing changed meaningfully in 2026: the SEER2 minimum jumped to 14.3 nationally (15.2 in the South), R-454B refrigerant replaced R-410A across most new equipment, and heat pump tax credits under the IRA still return up to $2,000.
2026 HVAC Cost by System Type
- Central AC only (14.3 SEER2): $4,500-$7,800 installed
- High-efficiency AC (16-18 SEER2): $6,000-$10,500
- Gas furnace only (80% AFUE): $3,800-$6,200
- High-efficiency furnace (96% AFUE): $5,200-$8,500
- AC + furnace combo (3-ton): $8,500-$14,500
- Heat pump (3-ton, 16 SEER2): $7,500-$13,000 (before $2K IRA credit)
- Ductless mini-split (per zone): $3,500-$6,500
Sizing: Why Tonnage Matters More Than SEER
A rough US rule: 1 ton of cooling per ~500 sq ft. Oversizing wastes money and short-cycles the compressor; undersizing runs the unit non-stop. Always ask the contractor for a Manual J load calculation — it's the difference between a 15-year system and a 7-year one.
The Formula
Total = (Base install + Tons × Per-ton equipment cost + Ductwork + Thermostat) × Regional cost index
Hidden Costs to Budget
- New / modified ductwork: $2,500-$5,000
- Line set replacement (R-454B): $600-$1,200
- Electrical disconnect + whip: $250-$450
- Permit + inspection: $150-$400
- Old refrigerant recovery + haul-away: $200-$350
Get an instant 2026 estimate for your home.
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