It is no different than a fireplace, smoke goes up and out through pipes. I've been using it for years. About 7-8 years ago I added fireplace glass on it and put firestones in it. It is about 5 ft. wide. I use it as a woodstove when I'm not grilling. I put huge logs and burn them slowly, it takes 2 days for a big log to burn if I want it to burn slowly.
This is google image search result for "ocakbaşı" to give you an idea of how an unmodified and classical version of ocakbaşı which is widely used in restaurants looks like.
I used to have another ocakbaşı many years ago, it was very old and traditional one. It was made of copper and there were many reliefs on it, just like the ones in this photos. This traditional one might look great but I prefer the chrome one that I use right now, I don't think the fumes of copper is healthy at all.
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