Been burning 24/7 since November with this thing and it is a great stove! Have yet to turn my heat on even during the coldest days so far! Great investment as far as I am concerned. The last week or so though, I have noticed that if I shut down the primary air all the way I am getting secondary burn type flames shooting out of the boost manifold in the lower front portion of the stove as well as some slow dancing flame around the lower portion of the door area. Just started doing this a week ago and has me somewhat concerned. Any other Summit Series B owners notice this as well???