What kind of walls can I mount my ethanol fireplace on?

For the wall mount models, only mount them on a sturdy, flat, vertical wall surface. You can mount it against brick, drywall, stone, tile, and wallpapered walls. Do not mount it on any wall with a fabric or cloth covering. Make sure the provided spacers are screwed onto the back side of the fireplace as directed so that the fireplace is not directly against the wall. Always refer to the installation instructions for the particular model you are interested in as they may very by manufacturer.