<P> Ceramic heaters are usually portable and typically used for heating a room or small office, and are of similar utility to metal - element fan heaters . </P> <P> PTC ceramic material is semi-conductive and when voltage is applied to it, the power decreases quickly as it reaches a certain temperature according to the particular composition of the ceramic . This means its temperature is self - regulating . </P> <P> The ceramic elements are in contact with aluminium fins, thereby heating the fins up . A fan blowing across the fins heats the air . </P> <P> Electric heating elements made of resistance wire also have a positive temperature coefficient of resistivity, but do not increase their resistance enough to be self - regulating; they are typically used with the wires red - hot . The ceramic, on the other hand, increases its resistance sharply at the Curie temperatures of the crystalline components, typically 120 degrees Celsius, and remains below 200 degrees Celsius, providing a significant safety advantage . </P>

What's the difference between a ceramic heater and a fan heater