Real Flame ventless fireplaces and personal firepots are an alternative to the hassles of wood burning fire places or the handling of propane bottles. Real Flame products use a safe burning, environmentally friendly gel fuel made from isopropyl alcohol. The flame burns clean and free from smoke, soot and flying embers.The Real Flame gel produces a bright and robust red, yellow and orange fire. They are engineered to crackle just like a real burning log. The gel fuel comes in cans that fit into the recepticle built in to each fireplace, or personal firepot. Each can burns for as much as 3 hours. While they are not intended for a heat source, they do produce about 3000 BTU's per hour. If your relaxing session does not last for three hours, simply use the snuffer and close the lid. This saves the remaining fuel to use at another time.