How to read Peerless boilers serial numbers
This covers Peerless, PB Heat. The serial number is on the rating plate on the boiler jacket. The date is the group of digits after the dash in the serial number.
Reading it yourself
Since 2000: six digits, a dash, then six more. The six after the dash are the year, then the month: 200206 is June 2002.
Example:
399606-200206was made in June 2002.1984 to 1999: six digits, a dash, then four more, sometimes with letters in front. The four after the dash are the month, then the year: 0196 is January 1996. Boilers made before 1984 have no date in the serial.
Example:
ECT-020425-0196was made in January 1996.
This is the date the unit was made. It was usually installed soon after, but it can be later. If a serial doesn’t fit any of these patterns, look on the label for a printed manufacture date.
Sources
Checked in October 2026.
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