I have a Waterford 100b. I have given up on the idea that it can somewhat heat my 1200 sq ft ranch home. The Heritage 2, I removed from my buddy's house, upon measuring will not fit . The ash pan will not clear the side wall. So now I am at impasse. Any advice? And if it involves a new stove, which one? I have looked at the jotuls f3 and f400.