Fireplace vents?

[Scott A. Hand]

What exactly are these vents above the fireplace in this picture? It is a metal firebox and the ducts angle down toward box.

[David P. Valley]

Scott,

Those vents simply conduct the heat (from the fireplace below) into the living area.

[Larry D. Kage]

Exactly, those vents allow heated air to flow into the room. Typically, you will see some intake venting lower.

[Scott A. Hand]

Thanks Larry & David. I figured as much. This is the first of it's kind I have run across. Wanted to confirm what I figured was the purpose.