How old is my Bard furnace?

Serial number age decoder for Bard furnaces: 5 format eras, the decode rule in plain English, transcribed tables, and the official lookup.

• Bard furnace serial numbers in the 1980 to present format encode the year as digits 5-6 (YY) -> 1995 and the month as letter at position 4 (table below) (source: building-center.org).
• Example: serial 000F950926066-1 decodes to May 1995.
• Bard furnace serial numbers in the 1980 to 1980 format encode the year as letter 5: A = 1980 and the month as letter 4: D = Apr, F = May (source: building-center.org).
• Example: serial 123DA45678 decodes to April 1980.
• Bard furnace serial numbers in the 1962 to 1980 format encode the year as last letter (table below) and the month as second-to-last letter (Bard month table) (source: building-center.org).
• Example: serial 28193MT decodes to October 1978.
• Bard's official lookup at bardhvac.com returns warranty / registration lookup.

Format eras

• 1980 to present VERIFIED
  ###A#########-#digits 5-6 (YY) -> 1995
• 1980 to 1980 VERIFIED
  ###AA#####letter 5: A = 1980
• 1962 to 1980 VERIFIED
  #####AAlast letter: B=1962 C=1963 D=1964 E=1965 F=1966 G=1967 H=1968 J=1969 K=1970 L=1971 M=1972
• era not stated VERIFIED
  ##### A##last 2 digits (YY) -> 1983
• era not stated VERIFIED
  #########digits 1-2 (YY) -> 1994

How to read the serial

1980 to present formatVERIFIED

Shape ###A#########-# · example 000F950926066-1 · confidence high

Year

digits 5-6 (YY) -> 1995

Week or month

month = letter at position 4: A=Jan B=Feb C=Mar D=Apr F=May H=Jun J=Jul K=Aug L=Sep M=Oct N=Nov P=Dec

Example: serial 000F950926066-1 decodes to May 1995.

1980 to 1980 formatVERIFIED

Shape ###AA##### · example 123DA45678 · confidence medium

Year

letter 5: A = 1980

Week or month

month = letter 4: D = Apr, F = May

Example: serial 123DA45678 decodes to April 1980.

1962 to 1980 formatVERIFIED

Shape #####AA · example 28193MT · confidence high

Year

last letter: B=1962 C=1963 D=1964 E=1965 F=1966 G=1967 H=1968 J=1969 K=1970 L=1971 M=1972 N=1973 O=1974 P=1975 R=1976 S=1977 T=1978 U=1979 V=1980 (I and Q skipped; O IS used)

Week or month

month = second-to-last letter (Bard month table)

Example: serial 28193MT decodes to October 1978.

era not stated formatVERIFIED

Shape ##### A## · example 36284 M83 · confidence medium

Year

last 2 digits (YY) -> 1983

Week or month

month = letter before the last 2 digits (Bard month table)

Example: serial 36284 M83 decodes to October 1983.

era not stated formatVERIFIED

Shape ######### · example 940128116 · confidence low

Year

digits 1-2 (YY) -> 1994

Week or month

not encoded

Example: serial 940128116 decodes to 1994.

Where the data plate is on a furnace

Inside the furnace: remove the upper (burner) access door and look on the inside of the door, on the blower compartment wall, or on a sticker facing you at the burner deck.

General guidance, not brand-specific: the owner's manual or the installer can point to the exact spot. See the data plate guide.

For scale only: the InterNACHI Standard Estimated Life Expectancy Chart for Homes lists Furnace at 15 to 25 years of expected service (nachi.org). That chart is a guideline, not a prediction for your unit.

What we could not confirm

• Five styles. Current style (since June 1980): 3 digits + MONTH LETTER + YY + sequence (-suffix). Month letters skip E, G, I, O (A B C D F H J K L M N P). bardhvac.com/resources/warranty/ = 200 (registration + warranty terms).

Sources

• https://www.building-center.org/bard-hvac-age/
• img: BARD-Date-of-Manufacture-Serial-Number-Style-1.jpg (transcribed)
• img: BARD-...-Style-2.jpg
• img: BARD-...-Style-3.jpg (transcribed)
• img: BARD-...-Style-4.jpg
• img: BARD-...-Style-5.jpg (plate photo)
• https://www.bardhvac.com/resources/warranty/official

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