I just replaced my twenty six year old Regency FM2400 with a Pacific Energy Super LE. On my first lighting I had a hell of a time keeping the flame going with draft wide open and very dry wood. It's going now on kindling but when I open door, I get a good puff of smoke coming out. The temps out side are around 10C (50F). They did have to put in an elbow at top for clearance purposes. I'm wondering if that could be the issue. My regency would lite up no problem. So could it be 1) new stove and needs to dry out 2) the elbow 3) let the pipe get up to temp before opening door to reload?