Ethanol bio fuel is a pure plant derivative made from only the purest ethyl alcohol and is of the highest quality fuels available on the market today. Ethanol is the recommended fuel for all bio ethanol fireplaces and is a non-toxic, smokeless, odorless and environmentally friendly fuel. One Quart of Ethanol burns for approximately 2 and 5 hours dependant on room conditions, model of fireplace and size of flame. Ethanol burns perfectly clean giving off CO2 and steam in similar proportions as that exhaled by humans. It is tested rigorously and consistently to ensure that air quality complies with the strict international government regulations. Ethanol has been diligently working with laboratories and was thoroughly tested by the U.S. government (TTB) and received a certificate as a safe fireplace fuel for non-vented decorative fireplaces acceptable for use in North America. Made in U.S.A.