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
Bard (1980 - Present)
Date of Manufacture (1980 to Present): The manufacturing date code is the fourth, fifth and sixth digits of the Bard serial number, and represents the month and year of manufacture. To determine month: A = Jan; B = Feb; C = Mar; D = Apr; "E" was not used; F = May; "G" was not used; H = Jun; I was not used; J = Jul; K = Aug; L = Sep; M = Oct; N=Nov; "O" was not used; and P = Dec.
For example: 123A91123454502 indicate that this sample Bard unit was manufactured in January of 1999.
Year of manufacture: 123A91123454502
Month of manufacture: 123A91123454502
Bard (April 1, 1980 to June 1, 1980)
Date of Manufacture (April 1 to June 1, 1980): The manufacturing date code is the fourth and fifth digits of the Bard serial number, and represents the month and year of manufacture. To determine month: D = April and F = May. The year 1980 used the letter “A” for identification.
For example: 123DA456789 indicate that this sample Bard unit was manufactured in April, 1980.
Year of manufacture: 123DA456789
Month of manufacture: 123DA456789
Bard (1962 to April 1, 1980)
Date of Manufacture (1962 to April 1, 1980): The manufacturing date code is the last two digits of the Bard serial number (Displayed as letters), and represents the month and year of manufacture.
To determine month: A = Jan; B = Feb; C = Mar; D = Apr; E = May; F = Jun; G = Jul; H = Aug; I was not used; J = Sep; K = Oct; L = Nov; and M = Dec.
To determine year: B = 1962; C = 1963; D = 1964; E = 1965; F = 1966; G = 1967; H = 1968; “I” was not used; J = 1969; K = 1970; L = 1971; M = 1972; N = 1973; O = 1974; P = 1975; “Q” was not used; R = 1976; S = 1977; T = 1978; U = 1979; and V = 1980.
For example: 144321BV indicate that this sample Bard unit was manufactured in February, 1980.
Year of manufacture: 144321BV
Month of manufacture: 144321BV