Every effort is undertaken to offer you correct and concise information to assist you in determining the age or manufacture date of HVAC equipment. Anytime anyone is dealing with numbers and letters in determining data, mistakes and misinterpretation are bound to happen. For this reason if you find during your research that we may have erred please contact us. In addition perhaps you have come across a brand, model or serial number format that we have not addressed. Email us information or pictures of data/nomenclature plates of the unit and we will attempt to assist you in your determinations. Email
This page was last updated: 25 July 2009
Coleman (April 1992 to Present)
Serial Number format: 97104119
(This serial number was transcribed from an actual unit during a home inspection).
Using the first, second, third and fourth digits of the serial number 97104119 you will find the year and month of manufacture. The first and second digits are the year and the third and fourth digits are the month. This unit was manufactured in October, 1997.
Year of manufacture: 97104119
Month of manufacture: 97104119
Coleman (Prior to April 1992)
Serial Number format: 01881234
(This serial number is fictitious).
Using the first, second, third and fourth digits of the serial number 01881234 you will find the month and year of manufacture. The first and second digits are the month and the third and fourth digits are the year. This unit was manufactured in January, 1988.
Year of manufacture: 01881234
Month of manufacture: 01881234