new member here, looking for help. i have an earth stove, wood burning, free standing. putting it in a shop with concrete floor and metal walls and roof with thin insulation. need to know if it is best to run pipe straight up and out the roof or elbow it through the wall and then run pipe up outside, also what kind of pipe do i use, insulated or regular, how high above the roof line, what all will i need, and about how much will it cost. thanks a bunch...........