If your home has central heating, you might be able to save on your electric bill by lowering the thermostat to 60 degrees and using space heaters for the areas that are occupied. When using these heaters, safety is the most important aspect to keep in mind. Make sure you get a unit with a switch that automatically turns it off in case it gets tipped over. Safety experts also warn you never to use an extension cord with a radiant heater. Finally, place your heater in a spot that's well away from drapes, furniture, or other combustible materials. Not only is this a fire hazard, but these articles can be discolored or otherwise damaged by excess heat. There are several types of heaters on the market. The most basic is the radiant heater that has a simple reflector behind the heating element. These are most efficient in small areas, since the reflector is the only way of projecting heat into the room. More effective models produce heat from metal or ceramic heating elements, then use a fan to blow warmth into a room. Most radiant heaters have protective grills, but they still get hot enough that small children shouldn't be allowed around them.