Hi- I'm planning on putting my new (to me) Hearthstone III in my fireplace - Hearthstone calls this a "hearth mode" installation - funny term, but I like it. Anyway, I hadn't really considered the clearance from the top of the stove to the mantel, which is made of wood. Turns out it's about 19" which I don't think meets the stove's specs for clearance. So a couple of questions: 1) Can I install a mantel shield to reduce the minimum clearance from the top of the stove to the mantel? 2) If so, do I have to install the mantel shield against the wood mantel (with space for air flow) or can I install it above the fireplace opening? 3) Could I get one made of copper with the same clearance reductions? Also, the floor in the room where I'll be putting the wood stove is slate (on top of concrete); do I need to be concerned about extending the hearth at all? Thanks for any help!