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: 26 July 2009
Bryant (1980 - Present)
Date of Manufacture (1980 to Present): The manufacturing date code is the first, second, third and fourth digits of the Bryant serial number and represents the week and year of manufacture.
For example: 4086403525 indicate that this sample Bard unit was manufactured in the 40th week of 1986.
Year of manufacture: 4086403525
Week of manufacture: 4086403525
Bryant (1964 to 1979)
Date of Manufacture (1964 to 1979): The manufacturing date code is the first, second and third digits of the Bryant serial number and represent the week and year of manufacture.
To determine year: R = 1964; S = 1965; T = 1966; U = 1967; V = 1968; W = 1969; X = 1970; Y = 1971; “Z” was not used; A = 1972; B = 1973; C = 1974; D = 1975; E = 1976; F = 1977; G = 1978; H = 1979
For example: 12C123456 indicate that this sample Bryant unit was manufactured in the 12th week of 1974.
Year of manufacture: 12C123456
Month of manufacture: 12C123456