Magic, Bill. Magic. I'm a natural man....I see it, I feel it. Mike asked, reasonably and thoughtfully, what folks made of this situation. So I said what I thought. For those unable to read words for what they are without projecting meaning upon them, I said it looks small. No "determination" was made one way or the other. For those that work a particular locale for a couple decades and have seen a few thousand Chicago 8" tile liner chimneys pressed into service for fireplace use with a complete lack of draft, it's a reasonable guess. Thousands upon thousands of Chicago houses had/have these nearly fake fireplaces. Lacking adequate fireboxes, smoke shelves, properly sized liners, or any other semblance of an actual fireplace accoutrement properly applied in the quest to bring Prometheus' gift into one's living room......they all choke and back smoke into the house. The actual reasons for the lack of draft can be explained with a little high school physics, but because I paid little to no attention in high school physics, instead following my muse in tracing the path of the great Gaugin, I can't explain it in high school physics terms without brushing up on my homework. So I guessed and said it looked small. Because there's tens of thousands of them throughout Chicago. And they're all too small.