We have just a small backdraft on occasion now. It requires lighting it up and quickly closing the door. Less than three minutes and there's enough draft to pull the smoke. I then crack the door for five minutes while it takes off. Sadly this front room is the only place to put the stove and I can only get about 16' without it getting crazy outside in height. Right now I have about 7' exposed. Enough to clear the ridge and have my horizontal clearance. I don't really want to have to go higher. I think I'll add sections later if needed.