Kerosene is used primarily for heating, cooking, and lighting. Kerosene is also known as furnace oil, lamp oil, paraffin oil, range oil, and stove oil. Kerosene is a light petroleum distillate which is burned in stoves, water heaters, portable space heaters, and wick fed lamps. Kerosene contains a lot of the same physical attributes as jet fuel and gas turbine fuel. There are quite a few different kerosene grades, mainly based on sulfur content. The sulfur content of kerosene is important because it forms harmful pollutants when burned. Apart from sulfur content, kerosene grades have practically identical properties. 1-K kerosene is clear with ultra low sulfur content and is recommended for indoor use, while 2-K kerosene (higher sulfur content) is recommended for applications where there is an exhaust connected to whatever burning device is being used. Kerosene produces carbon monoxide when burned, which makes having an exhaust or ventilation system to the outside very important, regardless of the grade. Below is a little more information about some of the different kerosene grades and their uses.