The fuels used in fondue pots include butane, ethyl alcohol, isopropyl alcohol, candles and gel fuel. Users should read the manufacturer's instructions that came with the fondue pot to determine the best fuels for that particular model.
Liquid fuels, such as alcohol and butane, create a hotter flame than gels and candles. The liquid fuel options should be used for fondue recipes that contain meat and dairy products to ensure food safety.
Candles and tea lights are sometimes used in low-heat fondue pots for chocolate fondue and other desserts. The candle keeps the liquid warm and pourable.
For some fondue pots, such as those manufactured by Le Creuset, gel packs are used to heat the pot. These gel packs last for one or two recipes, after which they must be replaced.