In my home I have an old style fireplace. It is in an island in between the livingroom and dining room. Glass doors on each side as it is a see through type with openings to both rooms. Essentially it is about as inefficient as it could be. No way to control the heat or burn rate and the bulk of the heat simple goes up the large masonry chimney. It does heat the rooms but requires a lot of firewood to do so. We like the looks and ambiance it creates but in a difficult time we would like to be able to do SOME house heating with it more efficiently. I know a fireplace insert would be a good way to go but we would like to keep it as is for now. I am wondering if there would be any problem with simply acquiring a small woodstove and simply set it into the fireplace and stick a pipe up the chimney a few feet when needed? Do any of you know if there would be an issue with doing this as needed? I am wondering if there would be any issues with creating the proper updraft or convection or whatever to get the smoke to go up the chimney properly. I have only owned one woodstove before in a cabin so i have limited experience. Any advice would be appreciated.