I (will) have an EVL of 28 (22 vertical=12, 3 90's=15, 1 horizontal=1). I am using 4 inch piping by Selkirk and 20 feet of the vertical is up and out of the chimney (the other 2 feet is nside the house). Do you think I will have issues? I will run an OAK. It's a basement (finished) install and I am hooking into an existing chimney (masonry) at it's lowest point (which is above the stove). Sort of like this...