Armstrong Air serial number with year code D: 1983
In the Armstrong Air 1978 to 1992 format the year letter D means 1983.
Serial number decoder for Armstrong Air
Type the serial from the data plate, not the model number. Nothing is sent anywhere; the tables are in this page.
Format example: A14019ELA
- A Armstrong Air serial number with year code D was built in 1983 (1978 to 1992 format; source: building-center.org).
The full year-letter table
| Year code | Year(s) |
|---|---|
| 8 | 1978 |
| 9 | 1979 |
| A | 1980 |
| B | 1981 |
| C | 1982 |
| D | 1983 |
| E | 1984 |
| F | 1985 |
| G | 1986 |
| H | 1987 |
| J | 1988 |
| K | 1989 |
| L | 1990 |
| M | 1991 |
| N | 1992 |
Month letters
| Month code | Month |
|---|---|
| A | January |
| B | February |
| C | March |
| D | April |
| E | May |
| F | June |
| G | July |
| H | August |
| J | September |
| K | October |
| L | November |
| M | December |
Official lookup: the authority
Open the official Armstrong Air lookup takes serial number; returns warranty / registration lookup; URL verified live
This site is a reference built from published tables. The manufacturer's own lookup wins whenever the two disagree.
Sources
- https://www.building-center.org/armstrong-air-hvac-age/
- https://www.building-center.org/wp-content/uploads/2017/09/ARMSTRONGAIR2-HVAC-Age.png
- https://www.building-center.org/armstrong-hvac-age/
- https://www.building-center.org/airease-hvac-age/
- https://www.building-center.org/wp-content/uploads/2015/09/Style-2_Airease-Date-of-Manufacture_Serial-Number-Nomenclature.png
- https://www.building-center.org/magic-pak-hvac-age/
- https://www.armstrongair.com/owners/warranty-registration/official
