In my Osburn, about 10 - 20 minutes after adding several logs, the secondary burn flame seems to be pretty much filling the entire firebox, even with the draft control at it's lowest setting. Lots of heat coming out of the stove, and at times the rearmost burn tube can have a slight glow to it. I do get concerned about over firing. I know the new EPA rated stoves aren't designed to smoulder like older stoves, is this just the way they all are? Seems like after the wood has burned for 20 minutes or so things settle down a bit, but it sure gets hot for a while. Typical?