Installed system prices, equipment plus labor. If your repair quote is more than half of these numbers and the unit is 10+ years old, replacement usually wins.
Your estimated installed cost
How this works: base installed ranges (central AC $6,000–$12,000, furnace $4,500–$9,000, heat pump $8,000–$16,000) adjusted for home size and efficiency tier. Heat pumps may qualify for federal tax credits and utility rebates that change the math by thousands. Full breakdown in our HVAC cost guide.
Unlock the project-cost checklist
Use this after the calculator so every quote includes the same scope, assumptions, and warranty details. Nothing is emailed yet; it opens on this page.
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Checklist unlocked.
Ask whether the quote is based on a Manual J load calculation or a rule-of-thumb replacement.
Confirm equipment model numbers, efficiency ratings, thermostat, permits, electrical, venting, and disposal.
Get labor warranty, parts warranty, registration deadline, rebate assumptions, and change-order rules in writing.
Ask what repair diagnosis would make replacement unnecessary before approving a full system quote.