thanks rust. I agree. I have tried from low to high it doesn't make much of a difference. I have the t-stat in the middle and medium fan when I go to bed on a cold night. loaded full or loaded half doesn't make too much of a difference. I do not own a thermometer that measures the temp on the insert face. I think a bunch of heat is going up the chimney.
Either pick up a cheap IR temp gun or a magnetic thermometer. It'd be nice to know if the stove is actually getting up to temp. If the stove is getting up to temp and the house is still cold we'll have to figure out where all that heat is going! I'm sure some is going up the chimney, I can't imagine that's where all of it's going if the top of the chimney is sealed off.