e-NRG Bioethanol Fuel for Ventless Fireplaces (20 Gallons) The only bioethanol approved for use in EcoSmart Fire bioethanol burners Uniquely formulated to burn clean with no smoke, no soot, and little to no odor Produces the brightest, most vibrant orange flame with the longest burn time available Includes proprietary flame arrester for the safest fueling possible Quick and reliable delivery to your door, easy to use, and simple to store