An insert will be much more efficient at putting heat into the room, and with a big window you will still be able to enjoy a nice view of the fire.What if I I just decided to use the fireplace? Which would technically save the heat more a fire place or a stove?
You need to cut out enough to fit a flexible 6" liner down through that area. All of them that I have done have enough room without cutting any more than a tube or 2. But yours may be different. I also rivet sheet metal over the holes left by the cut tube to stop airflow.A couple more questions. With in those pictures, you can see that the current pipe for the pellet stove has to curve around this steel barrier for the fireplace blowers. Does all that have to come out? Also, somebody told me that piping has to go all the way to the top of the fireplace. Is that true?