default 6-4-1 and 1-2. ran it 3.5 hours and then 1 hour at 1-3. I did notice through paint/oil/metal smell, especially at first, but now it is a pellet smell but no visible smoke coming out anywhere. I probably could have run it hotter but seemed to be working at where I had it. the smell comes out of the room blower. almost tolerable but builds up in an hour. when the stove was on 3.5 hours I thought it had gone away almost.