Originally Posted By: JayKline
This post was automatically imported from our archived forum.
I just got this info from Lochinvar. Thought some of you might find it useful. I asked for the key to their code for dating Water heaters with Model number or serial number. Here’s what they sent:
"The following is a list of the starting letter of the serial number, as it applies to the year of manufacture."
G=1990 H=1991 J=1992 K=1993 L=1994
M=1995 N=1996 P=1997 S=1998 T=1999
W=2000 X=2001 Y=2002 Z=2003 A=2004
B=2005 C=2006 D=2007 E=2008 F=2009