Ok, I see lots of questions on the Mark123 unit but not what I'm looking for so I hope someone can give me a hand. I have a Model3036 in this house that I bought 2 years ago. Now I want to remodel the family room where the unit is, including a new mantel surround and tiling of the face of the unit. As long as I don't block any of the vents with tile, is it okay to tile the metal exterior of the unit? Also, this has a "hood" on it. You can take the hood off and there are no vents there, so what is it's purpose? Can I remove this hood and tile that surface?