HVAC Replacement Cost Calculator

Estimate the installed replacement cost range for a central HVAC system from home and equipment inputs.

2026 headline: replacing a central HVAC system typically costs $7,800–$16,500 installed, national median ≈ $11,200 (3-ton, 16 SEER2, 1,800–2,200 sq ft).

Home & system inputs

0% is typical. 100% adds ≈$3,000–$8,000.

Used for repair-vs-replace guidance (typical life 15–25 yrs).

System size: derived automatically from square footage and climate (snaps to standard 2 / 2.5 / 3 / 3.5 / 4 / 5 tons). Manual J load calc required for true sizing.

Estimated installed cost

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10-year total cost of ownership (mid-tier baseline)

Decision guidance

  • Replacing a central HVAC system typical runs $7,800–$16,500 installed; ~$11,200 for a 3-ton mid-tier combo on a 1,800–2,200 sq ft home.
  • Get a Manual J load calculation before any contractor sizes the system — oversizing/undersizing is the #1 cause of premature failure. Sizing here is by square footage only (budgeting, not engineering).
  • New federal SEER2 minimums took effect 2023 (14 SEER North / 15 South) — make sure any quote is SEER2-rated with a matching coil.
  • Ductwork can add meaningfully if included (0% typical, up to ~$3,000–$8,000 at 100%).
  • Beyond ~15 years, frequent repairs are common — replacement often beats continued repairs.

Worked reference: a 3-ton, 16 SEER2 combo on a ~2,000 sq ft mild-climate home lands near the $11,200 national median.

Data sources

Costs from HomeScope, CostPrism, Zone Air, ScoutMyTool, ProjectCostPro (2025–26). Tonnage × efficiency price table from HomeScope 2026 installed median pricing (incl. labor, materials, permits, disposal). Efficiency-tier multipliers per ProjectCostPro.

Tax credit: The federal §25C heat-pump credit (up to $2,000) applies only to systems placed in service on or before Dec 31, 2025 — 2026 installs generally do NOT qualify. Utility rebates vary by state. SEER2 replaced SEER in 2023; federal minimum 14 SEER (North) / 15 (South). Do not purchase without a Manual J load calculation. Estimates are directional; actual cost requires local contractor bids. All math runs in your browser.