Interior Designer Brian Gregory came to me with the request to engineer and build a 10' tall by 12' long solid walnut shelving unit with a fireplace installed in its center - all with minimal support. Many fire-tests, weight-tests, anchor-tests, and patience-tests later, we came up with this. The ethanol-burning fireplace by EcoSmart is designed to have zero-tolerance fire rating and may be installed into a construction using combustible materials (when done properly and by a professional). Neither gas lines nor flue are necessary. The Stainless steal fire box touches no wood and 'floats' in a 7" air-envelope that circulates any excess heat into the wall cavity. A granite frame that surrounding the hearth helps deflect the rising heat away from the wooden structure.