Quote:
Originally Posted by thinkxingu
If you don't already have one, you might consider a block-off plate covered with Roxul to retain a lot/most of the heat. You might also consider a fan to move the hot air out rather than up. Depending on the situation, it may actually be too much heat, though.
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There is a 6" stainless steel liner and a flat stainless closure plate with 6" collar at the top of the tile flue. That is all sealed well. Also a chimney cap with mesh sides. There is essentially no upward air flow outside of the 6" liner. Overall a bit more efficient than the original fireplace.