Can you use denatured alcohol in an ethanol fireplace?
Yes. Denatured alcohol is essentially alcohol that has been rendered undrinkable. Generally speaking, biofuels sold as suitable for ethanol fireplaces will have been denatured to protect users and to ensure the fuel is as cost-effective as possible (denatured alcohol is cheaper to sell than consumption-grade alternatives). In this way, using denatured alcohol in a bioethanol fireplace is perfectly acceptable.