Concord HVAC Age Lookup Tool
Concord is a Lennox International value brand built at the Allied Air plant in South Carolina and sold through independent dealers. The manufacturing date is the quickest way to gauge its age and remaining life. Enter your Concord serial number to find the manufacturing date and system age.
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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
Owned by Lennox International
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.
Common Concord HVAC Models & Series
The most-installed Concord residential systems on the market today, organized by tier. Knowing your series helps narrow down service parts and warranty terms.
| Series | Type | Tier | Efficiency | Notes |
|---|---|---|---|---|
| 4SCU16LB Air Conditioner | Air Conditioner | Mid-range | Up to 16 SEER2 | Single-stage scroll compressor; Concord's higher-tier outdoor unit. |
| 4AC13L / 4AC14L | Air Conditioner | Entry | Up to 14.3 SEER2 | Single-stage; the volume builder unit. |
| 4HP16LB / 4HP14L Heat Pump | Heat Pump | Entry | Up to 14.3 SEER2 / 7.5 HSPF2 | Single-stage heat pump for moderate climates. |
| 92G1UH Gas Furnace | Gas Furnace | Mid-range | Up to 92 AFUE | Single-stage condensing furnace. |
| 80G1UH Gas Furnace | Gas Furnace | Entry | Up to 80 AFUE | Single-stage 80% furnace common in mild climates. |
Concord HVAC Quick Facts
Warranty
Concord offers a 10-year parts warranty and 10-year compressor warranty when registered within 60 days; unregistered units default to 5 years parts. Heat exchangers carry a 20-year limited warranty.
Expected Lifespan
AC / Heat pumps: 12 to 17 years
Furnaces: 15 to 22 years
Where It's Built
Orangeburg, South Carolina (Allied Air Enterprises plant). Concord shares production with AirEase, Aire-Flo, Armstrong Air, and Ducane.
Price Positioning
Budget-to-mid tier — typically priced 25-35% below comparable Lennox-branded equipment for similar Allied chassis.
Known Concord Issues to Watch For
A short list of patterns reported on Concord equipment. Most have been addressed with revised designs or service bulletins, but they're useful context if you're diagnosing an older system.
- •Concord units use the same Allied chassis as AirEase and Aire-Flo, so coastal corrosion and coil joint issues from the 2010-2015 era apply equally here.
- •The reverse-position serial format (date code at the end instead of the front) trips up some older online decoders; when in doubt look at the last 4 characters.
- •Concord's dealer network is smaller than other Allied brands, so warranty service can take longer in some regions.
Concord HVAC FAQs
Related HVAC Brands
Concord shares a parent company with these brands, so they often use similar serial number formats and components.
Helpful HVAC Guides
Now that you know your Concord system's age, these guides help you decide what to do next.
Repair or Replace Your Central Air Conditioner?
Should you repair or replace your AC? Covers the 5,000 rule, repair cost benchmarks, efficiency savings, and when replacement is the smarter choice.
MaintenanceHVAC Maintenance Checklist: What to Do Every Season
A no-fluff seasonal HVAC maintenance checklist. What to DIY each month, what a pro should do twice a year, and what it actually costs to skip it.
Buying GuideWhat Size AC Do I Need? Tonnage Calculator and Guide
How to size a central AC the right way: square footage rules of thumb, when they're wrong, and why a Manual J load calculation is worth insisting on.
Energy EfficiencyHow to Lower Your AC Electric Bill: 12 Proven Ways
Cut summer cooling costs without sweating. 12 changes ranked by payback period, with worked math on what each one actually saves.
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The free HVAC age checker
Time to repair or replace your HVAC system?
Compare free quotes from top-rated local pros near you.
Share this tool with friends!
The free HVAC age checker