Description: Fifteen (15) character Serial number begins with four (4) letter digits followed by eleven (11) numerical digits.
Year of manufacture can be determined by using the combined 5th & 6th numerical digits and reversing the order. NOTE: From 95-98 they used both a year reversal and non-reversed. (i.e. "59"(reversed) or "95" (non-reversed) both indicated the manufacture year of 1995).
Month of manufacture can be determined by using the combined 7th & 8th digits.
Style 2: 000 051696000014209
Description: Eighteen (18) digit numeriacal Serial number.
Month of manufacture can be determined by using the combined 4th & 5th numerical digits
Day of Month of manufacture can be determined using the combined 6th & 7th digits.
Year of manufacture can be determined using the combined 8th & 9th digits.
Style 3: MBAH0920110887
Description: Serial number begins with four (4) letter digits followed by varied amount of numerical digits.
The month, day and year of manufacture can be determined by using the first six numerical digits.
Any of the trademarks, service marks, collective marks, design rights or similar rights that are mentioned, used or cited in the articles of the Building Intelligence Center (www.buildingcenter.org) are the property of their respective owners. Their use here does not imply that you may use them for any purpose other than for the same or a similar informational use as contemplated by the original authors of these articles under the CC-BY-SA and GFDL licensing schemes. Unless otherwise stated Building Intelligence Center (www.buildingcenter.org) sites are neither endorsed by nor affiliated with any of the holders of any such rights and as such Building Intelligence Center (www.buildingcenter.org) cannot grant any rights to use any otherwise protected materials. Your use of any such or similar incorporeal property is at your own risk. This guide is intended to assist Commercial/Residential Building Inspectors, HVAC professionals, Facilities Managers, HOA’s, etc.., in determining the date of manufacture and/or age of HVAC equipment to determine the expected useful life (EUL). This web site should not be relied upon for commercial use or interpretations. Accuracy and reliability of the information provided is believed accurate but is not guaranteed. The burden for fitness of information provided relies solely and completely with the user. In no event will Building Intelligence Center or its representatives be liable for any loss or damages whatsoever for consequential, incidental, indirect, special, or tort damages of any kind, including but not limited to loss of data, lost profits, business interruption, loss of business information, or other pecuniary loss that might arise from the use of or reliance on the information provided within.
Your financial support is greatly appreciated to help us to continue maintaining this site! Please consider a donation.
Note – YOUR browser must be configured to accept and store Cookies for the Do Not Show Again option to work. Selecting this will disable this pop up for 30 days if cookies are enabled and not cleared.