Worked for 4 hours removing my flue liner all 17'-2" of it. Bloody, Bruised, Banged up but I now have an empty chimney. Ready for lining. After I got both feet firmly planted on the ground and was picking up the debris I found the little sticker . . . .Type Ht UL 103 . . . does this mean I yanked a perfectly good zero/zero clearance Liner? I appologize for the slight seizmic disturbance in Central Indiana this morning when that sucker broke loose.