On either side of my firebox in my fireplace, I have these metal doors that go out to vents on the outside. They are horribly drafty and pretty much falling out. I want to know why they originally put them in and if it's OK if I seal them up with brick and mortar? I have never seen them on any other fireplace ever. In case it's applicable I have 2 full flues in this chimney, one on the first floor and one in the walk out basement.
Thanks!
Thanks!
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