Brick, metal or stone, A corbeled brick crown Acts as a drip to create Ambiance for heating a room - Ancient fire pits Vent smoke through open holes.
The best way to gauge Is not, and never was, Intended to heat the air. One of two horizontal metal bars opening in a hearth to sweep the ash. Warmth on cold days and nights, One of many flaws that I have found.
The inside is a metal piece Reflecting heat into the room With metal arms mounted on it, Which swing and hold words above.
The sides of a heart Has its opening near the throat.