I finally have just about everything narrowed down that I want to purchase, including the Englander 30-NC, 18 ft. of class a chimney pipe, and a kit to go through the wall. My question is once I go through the wall will I require an elbow to avoid a 12 inch overhang from my second story wall? At 8 feet from the ground, the second story siding protrudes approximately 12 inches and then goes straight up to the roof. If I install the through the wall support, will I be able to meet the 2 inch minimum requirement when I get to the 2nd story, or will I need to offset it with an elbow kit? I attached a picture to give a better representation of what I mean. Thank you!