I can't seem to find any info relating to this concern. I finally tore out the old broken heater in my 1974
Boler. The fibrous material around the heater itself looked like asbestos. And I'm nervous that the fibrous material that remains in the heater space is also asbestos. It is beige paper-like material that lines the entire space. I sealed it up for now but I'd love to use the space for a book shelf. Anyone know what this stuff is? I'm in Ottawa, maybe I can get a sample tested somewhere?? Thanks so much.