Buyer's Leverage
Buyer's Leverage
Inspection Intelligence
HVAC Replacement Cost Calculator (Free, )
HVAC

HVAC Replacement Cost Calculator

Free HVAC replacement cost calculator. Estimate AC, furnace, heat pump, and full-system replacement costs — with negotiation guidance for inspection findings.

R-22 has been banned since 2020 — systems must be replaced, not recharged.

Enter your inputs and we'll show you the estimated exposure, severity, urgency, and recommended next steps.

About this calculator

HVAC is the #2 most-expensive system in most homes after the roof. The 2020 R-22 refrigerant ban means many 2015-and-older AC systems can't legally be repaired — they must be replaced. This calculator covers central AC, heat pumps, furnaces, ductwork, and the smart-thermostat upgrade that improves any new install.

Free calculator vs full Buyer's Leverage report

What this calculator shows you

  • Estimated repair exposure range
  • Severity, urgency, and negotiation relevance for this issue
  • General next-step checklist
What a full Buyer's Leverage report unlocks
  • Issue-by-issue inspection analysis across your whole report
  • Total repair exposure with prioritization
  • Negotiation strategy + seller-credit guidance
  • Repair timeline and specialist recommendations
  • Related-issue patterns the inspector may have missed
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Related reading

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Frequently asked questions

How long does an HVAC system last?
Central AC: 12-15 years. Gas furnace: 15-20 years. Heat pumps: 12-15 years. Boilers: 20-30 years. Beyond these ranges, repair-vs-replace economics tip toward replacement — and energy efficiency gaps (15+ year systems use 30-50% more energy than modern ones).
What's the R-22 refrigerant issue?
R-22 (Freon) was banned in the U.S. on Jan 1, 2020 due to ozone depletion. AC systems using R-22 (built before 2010) cannot legally be recharged with R-22, and conversion is impractical. If an inspector flags R-22, the system needs full replacement — not a recharge — and sellers should credit the cost.
Heat pump vs furnace + AC — which is right for my home?
Heat pumps are the smarter choice in moderate climates (Zone 4 and warmer) — they replace both AC and furnace with one unit, qualify for $2,000 federal IRA tax credits, and are 2-3× more efficient than gas furnaces. Cold-climate homes (Zone 5+) usually still need a backup gas/electric furnace for sub-15°F days.
Can I negotiate a new HVAC system as a credit?
Yes — and especially if the system is 15+ years old or uses R-22. Sellers know HVAC is a buyer dealbreaker. The going strategy is to ask for the upper end of your replacement estimate as a credit, not a repair. Credits let you choose your installer and unit; repair-before-closing locks you into the seller's preferred vendor.
Calculator results are estimates for educational planning only. Actual repair costs, negotiation outcomes, and professional recommendations vary by property, location, contractor, inspection findings, and market conditions. Buyer's Leverage does not replace licensed inspectors, contractors, engineers, real estate agents, attorneys, lenders, or insurance professionals.
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