But his chimney is lined just with clay. Yes an insulated stainless liner would be better. But clay liners can be just fine.Yeah, why get certified if the only people who care are a bunch of nerds on hearth.com? I guess it comes down to the individual and not the paper, as in many other cases.
If the 8"x11" measurements he gave earlier are O.D. that might draft OK for many 6" stoves. But the BKs need good draft..but not too good. If he had the moolah for a BK, you'd think he'd have enough for a liner. Anything less than a lined chimney is half-arsin' it in my book.