Offset of verticle stove pipe between stoveand...

Question

The wood burning stove is connected to the chimney using four ft.of double wall and two 90 degree double wall elbows at the chimney which travels another 12 feet through the roof This oause ffset is required to aligne the stove with the cgimney. It is not possible to reposition either stove or chimney. the problem Is that the fire is hard to start and smokes badly until the fire and stove are hot. My question is thie cause due to this pipe installation or is there another reason? If this is the problem would replaceing the two 90 degree elbows with two 45 degree elbows improve the performance? If this is the solution how is it accomplished? This is a Canadian made stove. made by LTD. Barrie Ontario Canada Model EPA 1400 EPA # 027870 DATE CODE 04/17/01 WARNOCK HERSEY