It is important that you use the correct quality fuel in order to avoid malfunctioning. Zibro offers you a choice of two types: Zibro Extra is a low odour fuel with 80% less sulphur than normal petroleum and Zibro Kristal is a fully synthetic isoparaffin which is even odourless. The use of these pure fuels developed specially for heaters is healthier for you and less of a burden on the environment. Moreover, you can save for extra warranty on your heater, because it has a longer useful working life thanks to the use of Zibro fuels. Make sure there is sufficient ventilation. Fresh air is essential for you and for good combustion.