Number 3 of 6 settings? I have low med and high and then the adjustment of the feed. Currently almost low feed as you can go as I said and med. Just going to keep it running. Especially the next 2 days. Full clean on Sunday. My first year. Love the pellet heat. My family too. High 70's upstairs and low 70's downstairs. Have to figure what works best for the house and the stove etc.