Ducane HVAC Age Lookup Tool
Built at the Allied Air Enterprises plant in Orangeburg, South Carolina, Ducane is a Lennox International brand that shares its line with AirEase and Concord. The build date helps you plan maintenance and weigh repairs against a replacement. Enter your Ducane serial number to find the manufacturing date and system age for free.
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Finding Your Ducane 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 Ducane HVAC Systems
Owned by Lennox International
Ducane is a Lennox brand built at the Allied Products facility in West Columbia, South Carolina. Lennox uses the West Columbia plant for several of its brands, including Concord and Ducane.
Ducane was positioned as a mid-price residential brand distributed through independent dealers. The serial number format has two styles. The older format encodes the year and week in the last four digits, while a newer style uses a month letter code. Both are handled by this decoder.
Common Ducane HVAC Models & Series
The most-installed Ducane 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 |
|---|---|---|---|---|
| 4AC16L Air Conditioner | Air Conditioner | Mid-range | Up to 16 SEER2 | Single-stage scroll compressor; Ducane's higher-tier outdoor unit. |
| 4AC13L / 4AC14L | Air Conditioner | Entry | Up to 14.3 SEER2 | Single-stage; the volume builder unit. |
| 4HP16L Heat Pump | Heat Pump | Mid-range | Up to 16 SEER2 / 8.1 HSPF2 | Single-stage heat pump for moderate climates. |
| 97G2DF Gas Furnace | Gas Furnace | Premium | Up to 97 AFUE | Two-stage condensing furnace with variable-speed blower. |
| 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 for mild climates. |
Ducane HVAC Quick Facts
Warranty
Ducane offers a 10-year parts warranty and 10-year compressor warranty when registered within 60 days; without registration, parts coverage drops to 5 years. Heat exchangers carry a 20-year limited warranty, with Lifetime Heat Exchanger coverage available on premium 97G2DF furnaces.
Expected Lifespan
AC / Heat pumps: 13 to 18 years
Furnaces: 18 to 25 years
Where It's Built
Orangeburg, South Carolina (Allied Air Enterprises plant). Ducane shares production with AirEase, Aire-Flo, Armstrong Air, and Concord.
Price Positioning
Mid-tier — typically priced 20-30% below comparable Lennox-branded equipment for the same Allied chassis.
Known Ducane Issues to Watch For
A short list of patterns reported on Ducane equipment. Most have been addressed with revised designs or service bulletins, but they're useful context if you're diagnosing an older system.
- •Ducane uses the same Allied chassis as Concord and AirEase, so the same coil corrosion patterns apply in coastal environments.
- •Older Ducane units (pre-2007, before Lennox bought the brand) used a different serial format and may not decode with current tools.
- •Distribution is regional, so finding parts and warranty service for older Ducane equipment may require working through a Lennox-affiliated dealer.
Ducane HVAC FAQs
Related HVAC Brands
Ducane 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 Ducane 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