I would dang sure have it smelling different. Especially after a work day. The interior would have either a nice fly ash smell. Or smell like coal dust mixed with sweat. Depending on where in the plant I was working.
Got to be careful around that fly ash. It will kill you deader than dirt. Quicker than two jiggles of a jack rabbits ass. Its basically all the stuff they filter out of the smoke before it gets released through the smoke stack. Best I recall it contains: inorganic arsenic, lead, copper, hexavalent chromium, and lots of other healthy goodies.