I have a Regency i1200 insert. this ofcorse is completely inclosed with my surround. I have a thermomoter that I stick on the body right above the top corner of the door....I get good heat at around 300 to 350, " with fan going" only once in awhile does it get to 400. Have never seen over 425. my question would be ??? do you think I am burning hotter than what this thermonotor is reading? and does anyone know how I could get a accurate reading on this burner? I can't help but to beleive it is burning hotter.... another thing is , how hot does it have to be for the wash system to work effientiantly? because it doesn't seem to wash as well as I would expect it to? and if it isn't....does this mean I am not burning it hot enough? minor things....I do get good heat...but these little things drive me crazy and yes...I do have pretty good season wood, had to but some ..!@!^%*^&$% what I had wasn't dry enough