AAON® and AAONAIRE® HVAC age
How to determine the date of production/manufacture or age of AAON ® brand HVAC Systems.
The date of production/manufacture or age of AAON brand HVAC equipment can be determined from the serial number located on the data plate.
Parent Company: AAON
Example serial number styles/formats found:
- Style 1: 200108AKG26241
- Style 2: 97JKGK153
- Style 3: AKEC08701
Style 1: 200108AKG26241
Year of manufacture can be determined by using the 1st - 4th numerical digits
Month of manufacture can be determined by using the 5th - 6th numerical digits

Style 2: 97JKGK153
Year of manufacture can be determined using the 1st & 2nd numerical digits
Month of manufacture can be determined using the 3rd character (see chart)

Style 3: AKEC08701
Year of manufacture can be determined using the 6th &7th numerical digits
Month of manufacture can be determined using the 8th & 9th numerical digits

Page last updated: 08/07/2023
Brand History:
- 1988 - The company was founded with the purchase of John Zink Air Conditioning Division.
- 1991 - Formed AAON Coil Products, a subsidiary to AAON, Inc. and purchased the coil making assets of Coil Plus.
- 1992 - AAON Coil Products purchased 110,000 square feet plant in Longview, Texas.
- 2018 - Acquired WattMaster Controls, Inc.
- 2019 - Company broke ground on new R&D facility in Tulsa, OK
- Company has grown to a publicly traded company with over 3,000 employees. Headquartered in Tulsa, OK, with secondary locations in Longview, TX, and Kansas City, MO.