Hamilton® – Winchester®

How to determine the date of production/manufacture or age of Hamilton® or Winchester® brand HVAC Systems.

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

Parent Company:  Hamilton Home Products

Example serial number styles/formats found:

  • Style 1:    01 01 101 2697 1000

Style 1:   01 01 101 2697 1000

Week of manufacture can be determined by using the 8th & 9th numerical digits.
Year of manufacture can be determined by using the 10th & 11th numerical digits.

Page last updated: 7/26/2017

Main Office:
8260 Howe Industrial Parkway, Suite F, Canal Winchester, OH 43110

Customer Service Phone:
(800) 879-0123

Customer Service Email:

Business Hours:
M-F 8:30 AM to 5:00 PM

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.

Help keep this site FREE to the public.

Please consider a single donation of $5, $10, $20, $50 or more…

Or join some of our generous donors who provide $2 to $10 automatic monthly donations!
Any amount will help and greatly appreciated to help us maintain this site for your use!