Marley® Cooling Towers

How to determine the date of production/manufacture or age of Marley® Cooling Tower Systems.

The date of production/manufacture or age of Marley® HVAC equipment can be determined from the serial number located on the data plate.

Parent Company:  Marley – SPX

Example serial number styles/formats found:
  • Style 1:    AQ-10041433-A1 496M

  • Style 2:    1067198-A1-NC8405BG-13
Style 1:     AQ-10041433-A1 496M

Unfortunately we are unable to determine or verify the date of manufacture or age of these units.

We suspect the last four characters of the serial (496M in this example) likely indicate date of manufacture or reconstruction; however, we are unable to verify/confirm this data.

Perhaps you can assist us in our research with additional information.
Email us at: New Information Submission

Style 2:     1067198-A1-NC8405BG-13

The year of manufacture (or reconstruction) for this style can be determined from the last two digits in the serial number.

In this example, the last two digits are “13” or otherwise indicating 2013 as the year of manufacture or reconstruction.

Thank you to James at for providing Style 2 information.

Page last updated: 23 February 2023