Fireplace fresh-air intake w/good seal?


Jay Levitt

My masonry, wood-burning fireplace has a fresh air intake on the back
wall; it's just a cast-iron plate that slides on rails across a round
metal duct, which vents straight to the outside.

This makes it much easier to start a fire, without having to open a
window, but it is quite drafty when it's closed - the plate has about a
1/4" gap behind it. Even with sealing fireplace doors, I get a draft in
the room. I assumed the draft was coming from the (slotted!) damper,
but after getting a top-sealing damper, I'm still seeing it.

Can anyone recommend an outside-air intake that seals well, or is there
no such thing? An exhaustive Google search failed to come up with


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