Gel fuel is an alcohol-based compound that doesn't give off toxic smoke or noxious odor when burned. Its primary use is in fireplaces, but it also has applications in catering and other indoor events where odorless fires could prove helpful. One of the best things about gel fuel is its simplicity. Just like wax candles, gel fuel can be created in large quantities using alcohol gelling agents such as calcium acetate, celluloses, amines, etc. Through careful formulary, gel fuels can be formulated to burn with a crackling sound like a normal wood-burning fire. An 8oz. container of gel fuel burns for about three hours. Installing a fireplace for gel fuel doesn't even require demolition or installation in the house.