Age versus condition
Manufacture date, installation quality, usage, maintenance, climate, and equipment type all affect remaining life. An older maintained system may still operate; a newer system can still have installation or performance problems.
Colorado buyer due diligence
Furnace & Air-Conditioning Age: A Buyer’s Guide
Age is only one clue. Learn how to review model numbers, service history, safety, performance, replacement planning, and the limits of a general inspection.
Quick checklist
Questions to investigate before the deadline
- Photograph model and serial numbers
- Request service and repair records
- Observe heating and cooling operation when conditions allow
- Budget using condition and professional findings—not age alone
What buyers can review
Locate the furnace, condenser or heat pump, thermostat, filter, condensate route, flue, and accessible service labels. Ask for permits, invoices, warranties, and recent service reports, and note unusual noise, corrosion, leakage, or short cycling.
Inspection and planning
A general inspector observes accessible systems under the conditions available. When operation, safety, combustion, refrigerant, ductwork, or remaining life is a concern, obtain an HVAC evaluation and current replacement options before relying on a rough online lifespan.
Verified August 2026. General education only—not inspection, engineering, insurance, tax, title, or legal advice. Your signed contract controls rights and deadlines.