I have a Lopi Answer and a question. It seems the secondary burn tubes (one in the front, one in the back) start to fire around 550F (thermometer on the pipe where it meets the stove) and with the air inlet closed 90%. Additionally, I am assuming that I should be trying to get them blowing as often as possible. ...however, I have the manuel and have been scrounging the forums, but I cannot find an answer to this question: how exactly do the secondary burn tubes work? Obviously air comes out to more fully complete the burn, but where is that air coming from, how does it move through the stove, and what can I do to fully utilize it's action? Basically, I would like to know what the heck is going on so I can better manage my burning technique. Thanks and sorry for a basic question, but I am sure it is important.