AAF® | AAF-McQuay® | Herman-Nelson® | Incremental® | McQuay® | Prefex® | Remington® | Singer® | Skyline® | Vision®
Parent Company: AAF-McQuay Group, Inc., a subsidiary company of DAIKIN, Industries (Thailand) Ltd.
How to determine the date of production/manufacture or age of AAF-McQuay Group, Inc. brand HVAC Systems.
The date of production/manufacture or age of AAF-McQuay Group, Inc. brand HVAC equipment can be determined from the serial number located on the data plate.
Example serial number styles/formats found:
- Style 1: AUB U 08 05 00386
- Style 2: 55A1234501
- Style 3: 5PB1234503
Style 1: AUB U 08 05 00386
Year of manufacture is 5th & 6th characters combined.
Week of manufacture is 7th & 8th characters combined.

Style 2: 55A123501
Year of manufacture is 2nd character.
Month of manufacture is 3rd character.

Style 3: 5PB1234503
Year of manufacture is 2nd character.
Month of manufacture is 3rd character.

Page last updated: 10/6/2016