I have only 2 small basement windows about 18” by 10”. Would I have to take one of those out? I read that stove piping can’t go through windows or masonry. Perhaps part of the steel chimney is attached through the window?
Ussually during the installation a hole is made in an outside wall. You might want to get some stove guys in to give you some different options, or go to a stove shop and look at several applications.