Hi Jim, sounds to me that you definitely have a leak. I'm going to try to see if there is any support for a group legal action against Pro-Fab as they have been very unresponsive to these issues. My email is [email protected].I was hopeing like all of you that these elite 100s were the answer. I get 3 to 4 hr burns now that it is below zero, cold boiler every morning and every night when I get home from work and I add a gallon to a gallon and a half of water a week. And you are right Pro Fab really doesn't care. I'm thinking offpeak electric and the heck with cutting all this wood. I just can't get ahead of my wood pile. That old Aqua therm that burnt anything in it sure looks good now. At least it kept my house warm. Just getting tired of the whole process. Jim