Concord HVAC Age Lookup by Serial Number
Decode your Concord serial number to find the manufacturing date, system age, and maintenance recommendations. Free and instant. No account needed.
Finding Your Concord Serial Number
Check these four spots on your HVAC system
Common Locations
What to Look For
- White or metallic manufacturer sticker
- Labeled "Serial No." or "S/N"
- Typically 8–12 characters long
- Usually near the model number
Can't find it? Try the electrical access panel on the front of the outdoor unit or inside the air handler cabinet.
Serial Number Examples
Don't worry if yours looks different — each brand has multiple formats and our system can decode most variations.
About Concord HVAC Systems
Concord is a Lennox brand built at the Allied Products facility in West Columbia, South Carolina. It was positioned as a mid-price alternative to the Lennox premium line and sold through independent dealers. The serial number format is a little different from most Lennox and Allied brands. Instead of the date code at the front, Concord puts it at the end. The last four digits encode the year and week of production.
Supported Brands
Share this tool with friends!
The free HVAC age checker
Need an HVAC pro? Get free quotes from trusted local HVAC contractors
Are you an HVAC contractor? Learn about our partner programShare this tool with friends!
The free HVAC age checker