Furnace & AC Replacement Cost Calculator
Heating and cooling equipment is the biggest energy and comfort decision in a home. This estimates furnace and central AC replacement cost by home square footage and efficiency tier.
System size follows home square footage and climate zone. Efficiency tier drives price: 80% furnace/13-14 SEER AC is standard; 96%+/16+ SEER is efficient and cuts utility bills; 98%+/heat pumps are premium. Regional: 0.85× rural to 1.35× metro. Rebates: many utilities and the federal government offer efficiency rebates that can offset a good chunk of the premium tier.
FAQ
How much does a new furnace and AC cost?
Roughly $12,000-$28,000 installed in 2026 examples for a 2,000 sq ft home, depending on efficiency tier. Doing both together is cheaper than replacing them separately.
Should I replace furnace and AC together?
Usually yes — they share the air handler and ductwork, and installing matched units is more efficient and cheaper per unit. If one is near end-of-life, pairing them now avoids a second service call and labor charge soon.
Are high-efficiency units worth the premium?
High-efficiency units (96% furnace, 16+ SEER AC) cut utility bills and often qualify for rebates, but the payback depends on local energy prices and climate. Have a load calculation done and compare lifetime cost, not just sticker price.
These are editable example ranges for budgeting, not contractor bids. Actual project cost varies by region, site condition, and finish level. Get 3 quotes before committing.