How old is my Concord equipment?
Enter the serial number from the label. The date comes from Concord's documented serial rules, not a guess.
Free, no account needed Photo scanning coming soon
By equipment type
Concord furnace age
Typical life: 15–20 years
Concord air conditioner age
Typical life: 10–15 years
Concord heat pump age
Typical life: 10–15 years
Questions
- How do I find the age of my Concord equipment?
- Enter the serial number from the rating plate above. Concord uses the Lennox family serial format, which includes the manufacture date.
Same serial format
Sources
- Lennox model and serial nomenclature (archived 2010)
- Allied Air warranty procedures WP20565203 Rev 10 (2015): serial number formats
- Building-Intelligence Center: Lennox HVAC age
- Electrical-Forensics: Air conditioner date codes
Rules last reviewed 2026-09-28. These rules are in Beta while we verify more real-world examples, so results are capped at medium confidence.
Manufacture dates are decoded from manufacturer serial-number conventions and available documentation. Serial formats can change. Verify critical equipment information with the manufacturer when necessary.