The funny thing about this was, this water heater was in a two-flat and sitting right next to the other identical water heater which had a proper extension.
http://nachi.org/forum/attachment.php?attachmentid=2492&stc=1&d=1143756213
http://nachi.org/forum/attachment.php?attachmentid=2493&stc=1&d=1143756243
