I am interested in construction a new fireplace for my home. I currently do not have any sort of flue etc. I love the idea of having a wood burning fire place as well as the efficiency of an insert. I have tried searching the internet to see if it is safe/possible to construct a fireplace around a wood insert. Can this be safely done without a traditional masonry firebox? will metal studs and or a hardyback material be sufficient, or should i go with a zero clearance unit?