smoke shelf

American  

noun

1. a ledge at the bottom of a smoke chamber, so made as to deflect or break downdrafts from the chimney.

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Example Sentences

By default, this creates the smoke shelf behind it.

From Seattle Times • Jan. 16, 2023

The smoke shelf comes immediately above the throat and is formed by recessing the brickwork of the back the full width of the chimney for at least four inches.

From If You're Going to Live in the Country by Lieberman, Frank

They are the throat, smoke shelf, and smoke chamber.

From If You're Going to Live in the Country by Lieberman, Frank

The throat will in this case be in the middle of the chimney with the smoke shelf on either side of it.

From Making a Fireplace by Saylor, Henry H. (Henry Hodgman)

There is also the sheet-steel smoke chamber which comes complete with throat damper and smoke shelf and is put in place above the lintel where it extends to the point where the flue commences.

From If You're Going to Live in the Country by Lieberman, Frank