Doug_N

Thanks for the links and tips

I saw a comment about fewer chimneys due to high efficiency gas appliances but fire places are still prevalent in single family houses. Most of my work is renovation so I have to duplicate what is there now. I am not sure about how to use poly lines because I a a noobee to AC

I have a renovation project where I am doing as built drawings for demo etc. There is a fireplace on the ground floor that is quite wide. The chimney protrudes out through the exterior wall, which is brick, and at the second floor, the chimney narrows down from a rectangle to a square before going through the roof plane. How can I do that? Doug Norton Whitby Ontario Canada