DucaneAllied Air Enterprises / Lennox International
Ducane HVAC Age Lookup
Find the manufacture year of any Ducane AC, heat pump, or furnace.
Air ConditionerHeat PumpFurnace
Enter Serial Number
How to decode the serial number
Ducane is manufactured by Allied Air Enterprises (Lennox International subsidiary) using the same year-week serial format as Lennox and Armstrong Air.
1993 to Present
First two digits = year, next two = week.
2317A12345
Position
Meaning
Example
1–2
Year — 2023
23
3–4
Week — Week 17
17
5+
Sequence — Ignore
A12345
Where to find the serial number
Data plate on unit side panel or inside furnace cabinet.
Decoded examples
2217A12345
→ Week 17, 2022
22 = 2022, 17 = week 17
Life expectancy
Expected lifespan: 15–18 years.
Common questions
Ducane is made by Allied Air Enterprises, a Lennox International subsidiary. Similar components and manufacturing process but sold as a value brand below Lennox pricing.