I bought and moved into an oil heated home in Massachusetts around Thanksgiving. Got quite a surprise with oil bills. There is a single chimney in the home with back to back fireplaces in the family room and formal living room, so the chimney is not on an outside wall. A third fireplace is off the same chimney in the master bedroom. The only one I'm considering converting is in the casual family room on the first floor. Most so-called "large" wood burning inserts I have researched are rated for up to 3,000 square feet, which, if that's the high end, it is what it is. My fireplace opening is also large with an arched top. One dealer told me that the top piece of the surround would have to be supplemented with another piece by fabricating something to look the same. Didn't like the sound of that. I would also need a hearth extension, even for an insert, based on what I'm told about current code. What's the biggest and baddest wood burning insert that people have been happy with or is there something else I should be looking at? I've seen other posts about a free standing stove, but don't have room for that in front of this fireplace.