Duromatic-Olsen®

How to determine the date of production/manufacture or age of Duromatic-Olsen® HVAC Systems.

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

Parent Company:  DMO Industries (Part of ECR International)

Example serial number styles/formats found:

  • Style 1:   850304091

Style 1:   850304091

Year of manufacture can be determined by using the 1st & 2nd numerical digits.
Month of manufacture can be determined by using the 3rd & 4th numerical digits.

Page last updated: 7/26/2017