That info from Jay doesn't apply to me. I think he is talking to someone else. I don't have a traditional water heater. As I said, I have a hydronic system. Do I have a dip tube in my Side-Shot system? As I said before, we have been adjusting the thermo on the unit up, but my water doesn't get much hotter. Tap water gets to about 112. The heat in the house is fine. Could there be something wrong with the unit's water heating thermostat? I appreciate the help, before I call in a serviceman. Thanks.