How to determine the date of production/manufacture or age of Comfortmaker® HVAC Systems.

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

Parent Company:  International Combort Products (ICP)., part of UTC Building & Industrial Systems,  a subsidiary company of United Technologies Corp.
Sister or similar Brands Include: Airquest® | Arcoaire® | ComfortMaker | Day & Night® | Dettson® | Heil® | ICP Commercial® | Keeprite® | Lincoln® | Tempstar®
Example serial number styles/formats found:
  • Style 1:     E072514528
  • Style 2:    R921500600
  • Style 3:    0000211401-P36-0098

Style 1:   E072514528

Description: Ten (10) character Serial number begins with a single letter followed by nine (9) numerical digits.
Year of manufacture is 2nd-3rd characters.
Month of manufacture is 4th-5th characters.

Style 2:   R921500600

Description: Ten (10) character Serial number begins with a single Letter (Normally an “R”)  and ends with nine (9) numerical digits.
Year of manufacture is 2nd-3rd numerical digit characters.
Week of manufacture is 4th-5th numerical digit characters.

Style 3:   See Below.


Page last updated: 29 March 2016

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!
650 Heil-Quaker Ave
Lewisburg, TN 37091
(934) 270-4100

ICP – Canada
6060 Burnside Court, Unit 1
Mississauga, Ontario L5T 2T5
(905) 795-8113

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 ( 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 ( sites are neither endorsed by nor affiliated with any of the holders of any such rights and as such Building Intelligence Center ( 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.