Ceramic heaters are suited for smaller areas such as kitchens or bathrooms. These units use electricity to power ceramic elements to conduct heat efficiently. Coil/Ribbon heaters work by using electricity to heat up coils within the unit. These coils radiate warmth throughout the area and are often found in fan heaters. Halogen heaters are designed to emit infrared heat efficiently from halogen bulbs. This works much like the heat you get from a light bulb but only much stronger. Halogen heaters use radiant technology which warms like the sun - they heat surfaces, not the air. As surface temperatures rise above the air temperature, they in turn warm the air. Open flame heater use natural gas or kerosene as a fuel that burns with a real flame. These kinds of heaters can often have a dry air effect in enclosed, small sized rooms. Oil filled describes radiators, these heaters do not burn any fuel but use electricity to heat oil encased in a metal frame.