We have a zero clearance fireplace with a pre fabricated metal insert. I'm told that the inside of the insert is on the small side and it would be hard to fit a wood insert. I'm also told that the duct work to connect the stove to my flue would clog up and have to be cleaned often. I'm wondering what advice others might have for me. I really want a wood stove as I have a free source of firewood from a family member. I can post pictures of my fireplace if that would help you to advise me... Thanks in advance!