OZOFireTM was created especially for Indoor Ventless Fireplaces and is totally safe for you and the planet. It is a clean, sustainable Bio-Ethanol fuel specially formulated to provide the cleanest fire possible while complying with all regulations required by U.S. Government Agencies. The only byproducts created when burning OZOFireTM fuel are water vapor and very small amounts of carbon dioxide; no toxins or offensive fumes are emitted. The flame is clean and odorless. OZOFireTM burns efficiently and there is no oily residue left in the tank as with other Bio-Ethanol fuels which contain petroleum distillates.