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
Slant Fin – Present day
Serial Number format: G0049257
(This serial number was transcribed from an actual unit during a home inspection).
Using the second thru fifth digits G0049257 you will find the year and week of manufacture. The first set of digits is the year and second set of digits are the week. This unit was manufactured in the 49th week of 2000.
Year of manufacture: G0049257
Week of manufacture: GSD0049257