We have 2 open fires and a huge house that can be cold unless the heating is cranked up at great cost, for some reason, both our fires throw out tons of heat, I lit our big fire within mins yesterday and after 10 mins the room was very warm and later the room hot. We had friends around and we turned the heat off a few weeks ago and we were all roasting yet open the door and its like going into a chest freezer...even the man who did the survey was surprised how good our fires were, he has tried everything to get his fire drawing well, he recons its trial and error. We moved from a house that was on higher footings with floor boards and although the fire was warm, it used to draw big draughts up through the floor boards around your ankles....the house we have now is on the ground virtually, its built in 1750 when that's what they did. Not sure what we will find in our next house but we will start off with an open fire as the chimney is still there and the current owners blocked it off to use the room as a bedroom. Then we will see how we get on and put in a log burner if necessary, the good thing about open fires you can burn larger logs and other stuff.......