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Official AirEase warranty & serial services

Read the plate. Check the evidence.

AirEase HVAC Serial Number Lookup & Age Decoder

Decode documented Allied Air manufacture dates, including the 1978–1992 historical suffix and the plant/year/month system used since 1993.

Browse AirEase manuals and guides →
Find the serial or date-code label ↓

Check a documented system

What’s on the rating plate?

Furnaces, central air conditioners, heat pumps, air handlers and packaged HVAC

Spaces and dashes are accepted. Check O/0 and I/1, and keep any leading zeros.

Checks ENERGY STAR model records and searches manuals separately from the serial. Certification records do not establish this unit’s manufacture date.

Known product context (optional)

Choose a system only when it matches the product family and its documentation. A purchase year or a manual’s publication date does not establish a manufacturing date.

Explore a sourced example:

Read the label on your product

Where to find the numbers.

Use the label on the main unit, not a separate component, accessory or shipping barcode.

Ducted HVAC rating plate

Look for
Model and Serial Number
Label location
Read the unit rating/data plate; Armstrong identifies the front or side of the unit. Record indoor and outdoor units separately.
Format / what to enter
Current documented example 1611A12345; historicalC89274AAC

Keep the model separate from the serial.

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Scope matters

Supported formats
and historical limits.

  • These rules apply to Allied Air equipment with the matching documented layout. They are not a universal Lennox-brand or ductless-product rule.
  • The serial does not establish installation date, active warranty, capacity or the full model.

Research reviewed October 16, 2026. This independent tool applies published rules and retains unresolved years and model candidates.

Source references

Allied Air documented plant, year and month

Allied Air ducted HVAC using the manufacturer's ten-character system since January 1993

The first two digits identify the documented plant reference; digits 3–4 encode year and the fifth character gives month. Date is manufacture, not installation or warranty expiry.

Allied Air historical month/year/factory suffix

Allied Air historical units produced 1978–1992

Manufacturer chart gives sequence-code letter(s), five sequence digits, month letter, year code and final factory letter. No precise day or complete model is encoded.

Reading your result

AirEase lookup questions

Why does the year code match more than one year?

Some systems reuse letters or only encode the last one or two year digits. Every supported interpretation is retained. A decade supplied from reliable records can narrow the reading; the tool does not automatically pick the newest year.

Does the serial identify my exact model?

Usually the model is a separate plate field. Where published serial ranges actually identify a model, the result shows model candidates and links to their manuals. Overlapping ranges remain ambiguous.

Can I share the result?

After a lookup, the address includes the serial in a fragment beginning with #serial=. Use “Copy share link” to share the serial and selected context. Opening the link runs the same lookup. The fragment is not a query-string result page.