Westinghouse®
How to determine the date of production/manufacture or age of Westinghouse® HVAC Systems.
The date of production/manufacture or age of Westinghouse® HVAC equipment can be determined from the serial number located on the data plate.
Parent Company: Nortek (formerly Nordyne Manufacturing)
Sister or similar Brands Include: AirBloc | AMBIRAD | Benson | Broan | Frigidaire | Gibson | Intertherm | Kelvinator | Manmouth | Maytag | Miller | Nordyne | Nutone | Philco | Reznor | Tappan | Ventrol | Westinghouse
Example serial number styles/formats found:
- Style 1: FGA030310579
- Style 2: F3891 4228
- Style 3: G6R9905-05028
- Style 4: 21584-97B
- Style 5: M38778
- Style 6: A16789
Style 1: FGA030310579
Description: Twelve (12) character serial number. Begins with three (3) letter digits followed by nine (9) numerical digits.
Year of manufacture is 4th & 5th numerical digits combined.
Month of manufacture is 6th & 7th numerical digits combined.
![](https://building-center.org/wp-content/uploads/2016/04/WESTINGHOUSE-1-Serial-Number.jpg)
Style 2: F3891 4228
Description: Nine (9) character serial number (does not count the space). Begins with one (1) letter and ends with eight (8) numerical digits.
Year of manufacture is 3rd & 4th digits combined.
![](https://building-center.org/wp-content/uploads/2016/04/WESTINGHOUSE-2-Serial-Number.jpg)
![](https://building-center.org/wp-content/uploads/2016/04/WESTINGHOUSE-2-Serial_Model-Data-Plate.jpg)
Style 3: G6R9905-05028
Description: Twelve (12) character serial number. Begins with a single letter, followed by a single number, then another single letter and ends with four numerical digits, followed by a dash (-) and five numerical digits.
Year of manufacture is 4th & 5th digits of the serial number combined.
Month of manufacture is 6th & 7th digits of the serial number combined.
![](https://building-center.org/wp-content/uploads/2016/04/WESTINGHOUSE-3-Serial-Number.jpg)
Style 4: 21584-97B
Description: Nine (9) character serial number (includes the dash (-)) that begins with five (5) numerical digits followed by a dash (-), two more numerical digits and ends with a letter.
Year of manufacture 7th & 8th digits (1st two numbers following the dash) of the serial number combined.
Month of manufacture is the last or 9th digit of the serial number (See chart below).
![](https://building-center.org/wp-content/uploads/2016/04/WESTINGHOUSE-4-Serial-Number.jpg)
Style 5: M38778 (Used exclusively from January 1980 through December 1984)
Description: Six (6) character serial number. Serial number begins with a letter followed by five (5) numbers.
Month of manufacture is 1st digit (letter) of the serial number. (See chart below).
Year of manufacture 2nd digit (number) of the serial number.
![](https://building-center.org/wp-content/uploads/2016/04/WESTINGHOUSE-5-Serial-Number.jpg)
Style 5: A16789 (Used exclusively from January 1970 through December 1979)
Description: Six (6) character serial number. Serial number begins with a letter followed by five (5) numbers.
Month of manufacture is 1st digit (letter) of the serial number. (See chart below).
Year of manufacture 2nd digit (number) of the serial number.
![](https://building-center.org/wp-content/uploads/2016/04/WESTINGHOUSE-6-Serial-Number.jpg)
Page last updated: 19 April 2016