A radiant heater is a heater that can heat an object without making contact with it. A wide variety of radiant heaters are available, and the infrared radiation method is used for various thermoelectric parts. Types include ceramic heaters and quartz glass tube heaters that use far-infrared rays, and quartz heaters that use near-infrared rays. Quartz glass tube heaters include those that come in a set consisting of a reflector and mounting holders. Quartz heaters have reflector and holder varieties that can be selected. Since they can heat the ambient air temperature to heat a wide area, these products are also used for drying or retaining heat.