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ICP family

How old is my Comfortmaker equipment?

Enter the serial number from the label. The date comes from Comfortmaker's documented serial rules, not a guess.

Look for “Serial No.” or “S/N” on the label. Spaces and dashes are fine.

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Comfortmaker is an ICP brand, and two of the oldest plate-confirmed examples of the ICP serial layout are Comfortmaker units from 1992. R921500600 has MFG. DATE 04/92 printed on its plate, and R920500318, a furnace, reads 01/92. In both, the digits right after the letter are the year (92), followed by the production week.

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Questions

Is the first letter of a Comfortmaker serial the month?
No, although some inspection charts say so. The plates don’t agree: R921500600 prints MFG. DATE 04/92, and R isn’t a month letter in any of those charts. We treat the letter as the plant code, as the plate-confirmed examples show.
What does E072514528 mean?
E is the plant, 07 is the year and 25 is the week: the 25th week of 2007, around June. An inspector reference shows it on the data tag of a 2007 Comfortmaker air conditioner.
Why doesn’t my older Comfortmaker serial show a date?
According to industry references, some Comfortmaker units from before 1991 have serials that don’t contain a date at all. Those plates print a separate MFG date, and that’s the date to use.
How do I find the age of my Comfortmaker equipment?
Enter the serial number from the rating plate above. Comfortmaker uses the ICP family serial format, which includes the manufacture date.

Heil, Tempstar, Arcoaire, KeepRite, AirQuest, International Comfort Products

Sources

Rules last reviewed 2026-09-28. These rules are in Beta while we verify more real-world examples, so results are capped at medium confidence.

Manufacture dates are decoded from manufacturer serial-number conventions and available documentation. Serial formats can change. Verify critical equipment information with the manufacturer when necessary.