Isn't that what a "pipe stove" is? It's centuries old if I'm not mistaken. Basically your fireplace is a big rectangular box with a metal pipe to carry the smok

Isn't that what a "pipe stove" is? It's centuries old if I'm not mistaken. Basically your fireplace is a big rectangular box with a metal pipe to carry the smoke out of the house. You put the food to cook on top of the box.